Sinn Féin is to bring forward legislation to remove a three-day wait period for abortions in early pregnancy. At present, there is a three-day waiting period between GP consultations prior to a termination. Sinn Féin leader Mary Lou McDonald announced the party will move legislation in the Dáil on Tuesday to remove this provision. She said: “We believe that this legislation will be passed. The three-day wait should never have been introduced and has had serious consequences. “It is time for the law to change and this would be a significant move towards compassion and ensuring barriers to women accessing healthcare are removed.” McDonald added: “Since the passing of abortion legislation, following the Repeal referendum, there have been concerns expressed at the mandatory three-day wait and the negative implications that it has had for women. “Any woman taking this decision will have given it deep thought and removing the mandatory wait does not mean that a woman cannot take more time if she wishes. “That option is always there. But forcing a woman to adhere to a three-day mandatory wait is not acceptable and has had a very negative impact. “It has meant that some women cannot get access to care because of difficulty getting a GP in their county. “It has also had serious consequences for women in very difficult circumstances where they are victims of domestic violence or sexual assault.”

By Dan Walsh

Uisce Éireann crews are working to repair a major burst in Enniscorthy and restore water to customers affected. Repairs are expected to be completed by 2pm today. 

The burst is impacting customers in Nunnery Road, The Moyne, Moran Park, Old Dublin Road, Sean Browne Court, Coolnahorna, Ballinahallin, Greenville Lane, Bohreen Hill and surrounding areas in Enniscorthy.

Uisce Éireann’s Padraig Lyng has assured customers that every effort is being made to restore a full water supply as quickly as possible.  

“We understand the inconvenience of an unplanned interruption, and we thank customers for their support while our works continue.” 

Typically, it takes two to three hours following repairs for normal supply to restore to all customers affected by an unplanned outage. However, it may take longer for normal supply to be restored to customers at the end of the network or on higher ground as the system recharges.  

Don't trust large context windows I recently watched a video that put a name on something I'd been feeling. The author splits an LLM's context window into two zones. There's the smart zone, where the model is sharp, and the dumb zone, where attention drops off and the model starts forgetting what you told it five minutes ago. The cutoff sits somewhere around 100k tokens. It doesn't matter how big the advertised context window is. This matters because coding agents will happily walk you straight into the dumb zone. A modern agent burns through tokens fast. A few file reads, a long debug session, a sprawling test run, and you're at 100k before lunch. Meanwhile vendors keep advertising windows of 200k, 1M, even 2M, as if those numbers represented a usable working set. They don't. Studies like RULER and Chroma's report on context rot show that effective context is a fraction of the advertised number, and that performance degrades gradually as you fill the window. Large context windows are mostly a marketing number. The architectures behind them work, but they paper over a problem the underlying attention mechanism doesn't really solve. The number on the box gets bigger every release. The usable part doesn't keep up. Modern agents are getting smart about this. Tools like Claude Code now auto-compact: when the session gets long, the agent summarizes the history and starts fresh. That helps. But auto-compaction kicks in after you've already spent time in the dumb zone, and the summary is itself produced by a model that's already degraded. Better than nothing, but I'd rather avoid the situation altogether. What I do is open a new session and pass it a spec I wrote myself. That's a much higher signal handoff than any automated summary, because I get to decide what matters going forward. It's the breadcrumb approach applied to agents. Leave an artifact that the next session, or the next person, can pick up cleanly. You can take this further. Projects like obra/superpowers and mattpocock/skills structure entire agent workflows around small, named artifacts. PRDs, plans, skills, sub-agent handoffs. Each one is a way to keep the working session in the smart zone by deliberately moving information out of the session into something the next session can read. So I treat my context window like a budget. I assume only the first chunk is really working for me, and everything I can move out of the live session and into a written artifact is one less thing for attention to fight over.

Back in the ancient AI days of 2023, my co-authors and I invented a term to describe the weird ability of AI to do some work incredibly well and other work incredibly badly in ways that didn’t map very well to our human intuition of the difficulty of the task. We called this the “Jagged Frontier” of AI ability, and it remains a key feature of AI and an endless source of confusion. How can an AI be superhuman at differential medical diagnosis or good at very hard math (yes, they are really good at math now, famously outside the frontier until recently) and yet still be bad at relatively simple visual puzzles or running a vending machine? The exact abilities of AI are often a mystery, so it is no wonder AI is harder to use than it seems.

I think jaggedness is going to remain a big part of AIs going forward, but there is less certainty over what it means. Tomas Pueyo posted this viral image on X that outlined his vision. In his view, the growing frontier will outpace jaggedness. Sure, the AI is bad at some things and may still be relatively bad even as it improves, but the collective human ability frontier is mostly fixed, and AI ability is growing rapidly. What does it matter if AI is relatively bad at running a vending machine, if the AI still becomes better than any human?

While the future is always uncertain, I think this conception misses out on a few critical aspects about the nature of work and technology. First, the frontier is very jagged indeed, and it might be that, because of this jaggedness, we get supersmart AIs which never quite fully overlap with human tasks. For example, a major source of jaggedness is that LLMs do not remember new tasks and learn from them in a permanent way. A lot of AI companies are pursuing solutions to this issue, but it may be that this problem is harder to solve than researchers expect. Without memory, AIs will struggle to do many tasks humans can do, even while being superhuman in other areas. Colin Fraser drew two examples of what this sort of AI-human overlap might look like. You can see how AI is indeed superhuman in some areas, but in others it is either far below human level or not overlapping at all. If this is true, then AI will create new opportunities working in complement with human beings, since we both bring different abilities to the table.

These are conceptual drawings, but a group of scientists recently tried to map the shape of AI ability and found that it was growing unevenly, just as the jagged frontier would predict. Reading, math, general knowledge, reasoning — all were things that AI was improving on rapidly. But memory, as we discussed, is a weak spot with very little improvement. Better prompting or better models (and GPT-5.2 is much better than GPT-5) might change the shape of the frontier, but jaggedness remains.

Bottlenecks

And even small amounts of jaggedness can create issues that make super-smart AIs unable to automate a task. A system is only as functional as its worst components. We call these problems bottlenecks. Some bottlenecks are because the AI is stubbornly subhuman at some tasks. LLM vision systems aren’t good enough at reading medical imaging so they can’t yet replace doctors; LLMs are too helpful when they should push back so they can’t yet replace therapists; hallucinations persist even if they have become rarer which means they can’t yet do tasks where 100% accuracy is required; and so on. If the frontier continues to expand, some of these problems may disappear, but weaknesses are not the only form of bottleneck.

Some bottlenecks are because of processes that have nothing to do with ability. Even if AI can now identify promising drug candidates dramatically faster than traditional methods, clinical trials still need actual human patients who take actual time to recruit, dose, and monitor. The FDA still requires human review of applications. Even if AI increases the rate of good drug ideas by ten times or more, the constraint becomes the rate of approval, not the rate of discovery. The bottleneck migrates from intelligence to institutions, and institutions move at institution speed.

And even where the AI is almost completely superhuman, humans may be needed for edge cases. As an example, take a study that used AI to reproduce Cochrane reviews, the famous deeply researched meta-studies that synthesize many medical studies to figure out the scientific consensus on a topic. A team of researchers found that GPT-4.1, when properly prompted and supported, “reproduced and updated an entire issue of Cochrane reviews (n=12) in two days, representing approximately 12 work-years of traditional systematic review work.” The AI screened over 146,000 citations, read full papers, extracted data, and ran statistical analyses. It actually outperformed human reviewers on accuracy. Oddly, much of the hard intellectual work — finding relevant studies, pulling the right numbers, synthesizing results — is solidly inside the frontier. But the AI can't access supplementary files and it can't email authors to request unpublished data, things human reviewers do routinely. This makes up less than 1% of errors in the review, but those errors mean you can't fully automate the process. Twelve work-years become two days, but only if a human with expertise in how science is actually done handles the edge cases.

This is the pattern: jaggedness creates bottlenecks, and bottlenecks mean that even very smart AI cannot easily substitute for humans. At least not yet. This is likely good in some ways (preventing rapid job loss) but frustrating in others (making it hard to speed up scientific research as much as we might hope). Bottlenecks also concentrate the work of AI companies into making the AI better at things that are holding it back, the way math ability rapidly improved once it became an obvious barrier. The historian Thomas Hughes had a term for this. Studying how electrical systems developed, he noticed that progress often stalled on a single technical or social problem. He called these “reverse salients” - the one technical or social problem holding back the system from leaping ahead.

Reverse Salients

Bottlenecks can create the impression that AI will never be able to do something, when, in reality, progress is held back by a single jagged weakness. When that weakness becomes a reverse salient, and AI labs suddenly fix the problem, the entire system can jump forward.

The most powerful example of this from the last month is Google’s new image generation AI, Nano Banana Pro (yes, AI companies are still bad at naming things). It combines two advances: a very good image creation model and a very smart AI that can help direct the model, looking up information as needed. For example, if I prompt Nano Banana Pro for the ultimate version of my otter test: “Scientists who are otters are using a white board to explain ethan mollicks otter on a plane using WiFi test of AI (you must search for this) and demonstrating it has been passed with a wall full of photos of otters on planes using laptops.” I get this:

Coherent words, different angles, shadows, no major misspellings. Pretty amazing stuff. Remember, the prompt “otter on a plane using wifi” got this image in 2021:

But it turns out that really good image generation was the bottleneck for a lot of new capabilities. For example, take PowerPoint decks. Every major AI company has been trying to get their AI to make PowerPoint, and they have done this by having the AIs write computer code (which they are very good at) to create a PowerPoint from scratch. This is a hard process, but both Claude and ChatGPT have improved a lot, even if their slides are a little dull. For example, I took my book, Co-Intelligence, and threw it into Claude and asked for a slide deck summary. The model is very smart, but the PowerPoint deck is limited by the fact that it has to be written in code.

Now here is the same thing in Google’s NotebookLM application, using its smart Gemini AI model combined with Nano Banana Pro. It isn’t using code, it is creating each slide as a single image. When image quality was low, this would have been impossible. Suddenly, it isn’t.

And since images are very flexible, I can play with style and approach. I had NotebookLM do a deep research report on science-backed methods of learning and then turn that into dense slide decks meant for reading in a variety of styles: one that looked hand-drawn, one that was inspired by 1980s punk, one that was “very dramatic and high contrast slides with a bright yellow background,” and, of course, one with an otter-on-a-plane theme.

In many ways, the hard stuff is inside the frontier for both Claude and Gemini, they can just take source materials, a topic, and an idea and summarize it in a slide. Hallucinations are very rare, and the sources are correct. It can create otter analogies or come up with a punk-themed description. This is the intellectually demanding part, and AIs have been capable of it for over a year. But making slides or other visual presentations was a bottleneck to making walls of text useful. The problem isn’t completely solved: images are not perfect, and you can’t edit them (apparently this will be fixed soon), but you can see where things are going.

Many lurches

Even if AI becomes superhuman at analysis and PowerPoint, I don’t think that means AI necessarily replaces the jobs of consultants and designers. Those jobs consist of many different tasks along the jagged frontier that AI is bad at and which humans excel: can you collect information and get buy-in from the many parties involved? Can you understand the unwritten rules that determine what people actually need? Can you come up with something unique to address a deep issue, that stands out from AI material? The jagged frontier offers many opportunities for human work.

Yet, we should expect to see lurches forward, where focusing on reverse salients leads to sudden removals of bottlenecks. Areas of work that used to be only human become something that AI can do. If you want to understand where AI is headed, don’t watch the benchmarks. Watch the bottlenecks. When one breaks, everything behind it comes flooding through. Image generation was holding back presentations, documents, visual communication of all kinds. Now it isn’t. What’s the next bottleneck? Memory? Real-time learning? The ability to take actions in the physical world?

Somewhere, right now, an AI lab is treating each of these bottlenecks as a reverse salient. We won’t get much warning when they break through. But a jagged frontier cuts both ways. So far, every lurch forward leaves yet more edges in which humans are needed. There will be many lurches ahead. There will also be many opportunities. Pay attention to both.

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Every few months I write an opinionated guide to how to use AI1, but now I write it in a world where about 10% of humanity uses AI weekly. The vast majority of that use involves free AI tools, which is often fine… except when it isn’t. OpenAI recently released a breakdown of what people actually use ChatGPT for (way less casual chat than you’d think, way more information-seeking than you expected). This means I can finally give you advice based on real usage patterns instead of hunches. I annotated OpenAI’s chart with some suggestions about when to use free versus advanced models.

If the chart suggests that a free model is good enough for what you use AI for, pick your favorite and use it without worrying about anything else in the guide. You basically have nine or so choices, because there are only a handful of companies that make cutting-edge models. All of them offer some free access. The four most advanced AI systems are Claude from Anthropic, Google’s Gemini, OpenAI’s ChatGPT, and Grok by Elon Musk’s xAI. Then there are the open weights AI families, which are almost (but not quite) as good: Deepseek, Kimi, Z and Qwen from China, and Mistral from France. Together, variations on these AI models take up the first 35 spots in almost any rating system of AI. Any other AI service you use that offers a cutting-edge AI from Microsoft Copilot to Perplexity (both of which offer some free use) is powered by one or more of these nine AIs as its base.

How should you pick among them? Some free systems (like Gemini and Perplexity) do a good job with web search, while others cannot search the web at all. If you want free image creation, the best option is Gemini, with ChatGPT and Grok as runners-up. But, ultimately, these AIs differ in many small ways, including privacy policies, levels of access, capabilities, the approach they take to ethical issues, and “personality.” And all of these things fluctuate over time. So pick a model you like based on these factors and use it. However, if you are considering potentially upgrading to a paid account, I would suggest starting with the free accounts from Anthropic, Google, or OpenAI. If you just want to use free models, the open weights models and aggregation services like Microsoft Copilot have higher usage limits.

Now on the hard stuff.

Picking an Advanced AI System

If you want to use an advanced AI seriously, you’ll need to pay either $20 or around $200 a month, depending on your needs (though companies are now experimenting with other pricing models in some parts of the world). The $20 tier works for the vast majority of people, while the $200 tier is for people with complex technical and coding needs.

You will want to pick among three systems to spend your $20: Claude from Anthropic, Google’s Gemini, and OpenAI’s ChatGPT. With all of the options, you get access to advanced, agentic, and fast models, a voice mode, the ability to see images and documents, the ability to execute code, good mobile apps, the ability to create images and video (Claude lacks here, however), and the ability to do Deep Research. They all have different personalities and strengths and weaknesses, but for most people, just selecting the one they like best will suffice. Some people, especially big users of X, might want to consider Grok by Elon Musk’s xAI, which has some of the most powerful AI models and is rapidly adding features, but has not been as transparent about product safety as some of the other companies. Microsoft’s Copilot offers many of the features of ChatGPT and is accessible to users through Windows, but it can be hard to control what models you are using and when. So, for most people, just stick with Gemini, Claude, or ChatGPT.

Just picking one of these three isn’t enough, however, because each AI system has multiple AI models to select. Chat models are generally the ones you get for free and are best for conversation, because they answer quickly and are usually the most personable. Agent models take longer to answer but can autonomously carry out many steps (searching the web, using code, making documents), getting complex work done. Wizard models take a very long time and handle very complex academic tasks. For real work that matters, I suggest using Agent models, they are more capable and consistent and are much less likely to make errors (but remember that all AI models still have a lot of randomness associated with them and may answer in different ways if you ask the same question again.)

Picking the model

For ChatGPT, no matter whether you use the free or pay version, the default model you are given is “ChatGPT 5”. The issue is that GPT-5 is not one model, it is many, from the very weak GPT-5 mini to the very good GPT-5 Thinking to the extremely powerful GPT-5 Pro. When you select GPT-5, what you are really getting is “auto” mode, where the AI decides which model to use, often a less powerful one. By paying, you get to decide which model to use, and, to further complicate things, you can also select how hard the model “thinks” about the answer. For anything complex, I always manually select GPT-5 Thinking Extended (on the $20 plan) or GPT-5 Thinking Heavy (if you are paying for the $200 model). For a really hard problem that requires a lot of thinking, you can pick GPT-5 Pro, the strongest model, which is only available at the highest cost tier.

For Gemini, you only have two options: Gemini 2.5 Flash and Gemini 2.5 Pro, but, if you pay for the Ultra plan, you get access to Gemini Deep Think (which is in another menu). At this point, Gemini 2.5 is the weakest of the major AI models (though still quite capable and Deep Think is very powerful), but a new Gemini 3 is expected at some point in the coming months.

Finally, Claude makes it relatively easy to pick a model. You probably want to use Sonnet 4.5 for everything, with the only question being whether you select extended thinking (for harder problems). Right now, Claude does not have an equivalent to GPT-5 Pro.

If you are using the paid version of any of these models and want to make sure your data is never used to train a future AI, you can turn off training easily for ChatGPT and Claude without losing any functionality, but at the cost of some functionality for Gemini. All of the AIs also come with a range of other features like projects and memory that you may want to explore as you get used to using them.

Getting better answers

The biggest uses for AI were practical guidance and getting information, and there are two ways to dramatically improve the quality your results for those kinds of problems: by either triggering Deep Research mode and/or connecting the AI to your data (if you feel comfortable doing that).

Deep Research is a mode where the AI conducts extensive web research over 10-15 minutes before answering. Deep Research is a key AI feature for most people, even if they don’t know it yet, and it is useful because it can produce very high-quality reports that often impress information professionals (lawyers, accountants, consultants, market researchers) that I speak to. Deep Research reports are not error-free but are far more accurate than just asking the AI for something, and the citations tend to actually be correct. Also note that each of the Deep Research tools work a little differently, with different strengths and weaknesses. Even without deep research, GPT-5 Thinking does a lot of research on its own, and Claude has a “medium research” option where you turn on Web Search but not research.

Connections to your own data are very powerful and increasingly available for everything from Gmail to SharePoint. I have found Claude to be especially good in integrating searches across email, calendars, various drives, and more - ask it “give me a detailed briefing for my day” when you have connected it to your accounts and you will likely find it impressive. This is an area where the AI companies are putting in a lot of effort, and where offerings are evolving rapidly.

Multimodal inputs

I have mentioned it before, but an easy way to use AI is just to start with voice mode. The two best implementations of voice mode are in the Gemini app and ChatGPT’s app and website. Claude’s voice mode is weaker than the other two systems. Note the voice models are optimized for chat (including all of the small pauses and intakes of breath designed to make it feel like you are talking to a person), so you don’t get access to the more powerful models this way.

All the models also let you put all sorts of data into them: you can now upload PDFs, images and even video (for ChatGPT and Gemini). For the app versions, and especially ChatGPT and Gemini, one great feature is the ability to share your screen or camera. Point your phone at a broken appliance, a math problem, a recipe you’re following, or a sign in a foreign language. The AI sees what you see and responds in real-time. It makes old assistants like Siri and Alexa feel very primitive.

Making Things for You: Images, Video, Code, and Documents

Claude and ChatGPT can now make PowerPoints and Excel files of high quality (right now, Claude has a lead in these two document formats, but that may change at some point). All three systems can also produce a wide variety of other outputs by writing code. To get Gemini to do this reliably, you need to select the Canvas option when you want these systems to run code or produce separate outputs. Claude has a specialized artifacts section to show some examples of what it can make with code. There are also very powerful specialized coding tools from each of these models, but those are a bit too complex to cover in this guide.

ChatGPT and Gemini will also make images for you if you ask (Claude cannot). Gemini has the strongest AI image generation model right now. Both Gemini and OpenAI also have strong video generation capabilities in Veo 3.1 and Sora 2. Sora 2 is really built as a social media application that allows you to put yourself into any video, while Veo 3.1 is more generally focused. They both produce videos with sound.

As many of you know, my test of any new AI image or video model is whether it can make an otter using Wi-Fi on an airplane. That is no longer a challenge. So here is Sora 2 showing otter on an airplane as a nature documentary... and an 80s music video... and a modern thriller... and a 50s low budget SciFi film... and a safety video, and a film noir... and anime... and a 90s video game cutscene... and a French arthouse film.

I have been warning about this for years, but, as you can see, you really can’t trust anything you see online anymore. Please take all videos with a grain of salt. And, as a reminder, this is what you got if you prompted an AI to provide the image of an otter on an airplane four years ago. Things are moving fast.

Quick Tips

Beyond the basics of selecting models, there are a few things that come up quite often that are worth considering:

• Hallucinations: In many ways, hallucinations are far less of a concern than they used to be, as newer AI models are better at not hallucinating. However, no matter how good the AI is, it will still make errors and mistakes and still give you confident answers where it is wrong. They also can hallucinate about their own capabilities and actions. Answers are more likely to be right when they come from advanced models, and if the AI did web searches. And remember, the AI doesn’t know “why” it did something, so asking it to explain its logic will not get you anywhere. However, if you find issues, the thinking trace of AI models can be helpful.

• Sycophancy and Personality: All of the AI chatbots have become more engaging and likeable. On one hand, that makes them more fun to use, on the other it risks making AIs seem like people when they are not, which creates a danger that people may form stronger attachments to AI. A related issue is sycophancy, where the AI agrees with what you say. The reasons for this are complicated but when you need real feedback, explicitly tell the AI to act as a critic. Otherwise, you might be talking to a very sophisticated yes-man.

• Give the AI context to work with. Though memory features are being added, most AI models only know basic user data and the information in the current chat, they do not remember or learn about you beyond that. So, you need to provide the AI with context: documents, images, PowerPoints, or even just an introductory paragraph about yourself can help - use the file option to upload files and images whenever you need, or else use the connectors we discussed earlier.

• Don’t worry too much about prompting “well”: Older AI models required you to generate a prompt using techniques like chain-of-thought. But as AI models get better, the importance of this fades and the models get better at figuring out what you want. In a recent series of experiments, we have discovered that these techniques don’t really help anymore (and no, threatening them or being nice to them does not seem to help on average).

• Experiment and have fun: Play is often a good way to learn what AI can do. Ask a video or image model to make a cartoon, ask an advanced AI to turn your report or writing into a game, do a deep research report on a topic that you are excited about, ask the AI to guess where you are from a picture, show the AI an image of your fridge and ask for recipe ideas, work with the AI to plot out a dream trip. Try things and you will learn the limits of the system.

Where this goes

I started this guide mentioning that 10% of humanity uses AI weekly. By the time I write the next update in a few months, that number will likely be higher, the models will be better, and some of the specific recommendations I made today will be outdated. What won’t change is the fact that people who learn to use these systems well will find ways to benefit from them, and to build intuition for the future.

The chart at the top of this post shows what people use AI for today. But I’d bet that in two years, that chart looks completely different. And that isn’t just because AI changed what it can do, but also because users figured out what it should do. So, pick a system and start with something that actually matters to you, like a report you need to write, a problem you’re trying to solve, or a project you have been putting off. Then try something ridiculous just to see what happens. The goal isn’t to become an AI expert. It’s to build intuition about what these systems can and can’t do, because that intuition is what will matter as these tools keep evolving.

The future of AI isn’t just about better models. It’s about people figuring out what to do with them.

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Every few months I put together a guide on which AI system to use. Since I last wrote my guide, however, there has been a subtle but important shift in how the major AI products work. Increasingly, it isn't about the best model, it is about the best overall system for most people. The good news is that picking an AI is easier than ever and you have three excellent choices. The challenge is that these systems are getting really complex to understand. I am going to try and help a bit with both.

First, the easy stuff.

Which AI to Use

For most people who want to use AI seriously, you should pick one of three systems: Claude from Anthropic, Google’s Gemini, and OpenAI’s ChatGPT. With all of the options, you get access to both advanced and fast models, a voice mode, the ability to see images and documents, the ability to execute code, good mobile apps, the ability to create images and video (Claude lacks here, however), and the ability to do Deep Research. Some of these features are free, but you are generally going to need to pay $20/month to get access to the full set of features you need. I will try to give you some reasons to pick one model or another as we go along, but you can’t go wrong with any of them.

What about everyone else? I am not going to cover specialized AI tools (some people love Perplexity for search, Manus is a great agent, etc.) but there are a few other options for general purpose AI systems: Grok by Elon Musk’s xAI is good if you are a big X user, though the company has not been very transparent about how its AI operates. Microsoft’s Copilot offers many of the features of ChatGPT and is accessible to users through Windows, but it can be hard to control what models you are using and when. DeepSeek r1, a Chinese model, is very capable and free to use, but is missing a few features from the other companies and it is not clear that they will keep up in the long term. So, for most people, just stick with Gemini, Claude, or ChatGPT

Great! This was the shortest recommendation post yet! Except… picking a system is just the beginning. The real challenge is understanding how to use these increasingly complex tools effectively.

Now what?

I spend a lot of time with people trying to use AI to get stuff done, and that has taught me how incredibly confusing this is. So I wanted to walk everyone through the most important features and choices, as well as some advice on how to actually use AI.

Picking a Model

ChatGPT, Claude, and Gemini each offer multiple AI models through their interface, and picking the right one is crucial. Think of it like choosing between a sports car and a pickup truck; both are vehicles, but you'd use them for very different tasks. Each system offers three tiers: a fast model for casual chat (Claude Sonnet, GPT-4o, Gemini Flash), a powerful model for serious work (Claude Opus, o3, Gemini Pro), and sometimes an ultra-powerful model for the hardest problems (o3-pro, which can take 20+ minutes to think). The casual models are fine for brainstorming or quick questions. But for anything high stakes (analysis, writing, research, coding) usually switch to the powerful model.

Most systems default to the fast model to save computing power, so you need to manually switch using the model selector dropdown. (Except for Gemini, the free versions of these systems do not give you access to the most powerful model, so if you do not see the options I describe, it is because you are using the free version)

I use o3, Claude 4 Opus, and Gemini 2.5 Pro for any serious work that I do. I also have particular favorites based on individual tasks that are outside of these models (GPT-4.5 is a really interesting model for writing, for example), but for most people, stick with the models I suggested most of the time.

For people concerned about privacy, Claude does not train future AI models on your data, but Gemini and ChatGPT might, if you are not using a corporate or educational version of the system. If you want to make sure your data is never used to train an AI model, you can turn off training features easily for ChatGPT without losing any functionality, and at the cost of some functionality for Gemini. You may also want to turn on or off “memory” in ChatGPT’s personalization option, which lets the AI remember scattered details about you. I find the memory system to be too erratic at this point, but you may have a different experience.

Using Deep Research

Deep Research is a key AI feature for most people, even if they don’t know it yet. Deep Research tools are very useful because they can produce very high-quality reports that often impress information professionals (lawyers, accountants, consultants, market researchers) that I speak to. You should be trying out Deep Research reports in your area of expertise to see what they can do for you, but some other use cases include:

• Gift Guides: “what do I buy for a picky 11-year-old who has read all of Harry Potter, is interested in science museums, and loves chess? Give me options, including where to buy at the best prices.”

• Travel Guides “I am going to Wisconsin on vacation and want to visit unique sites, especially focusing on cheese, produce a guide for me”

• Second opinions in law, medicine, and other fields (it should go without saying that you should trust your doctor/lawyer above AI, but research keeps finding that the more advanced AI systems do very well in diagnosis with a surprisingly low hallucination rate, so they can be useful for second opinions).

Deep Research reports are not error-free but are far more accurate than just asking the AI for something, and the citations tend to actually be correct. Also note that each of the Deep Research tools work a little differently, with different strengths and weaknesses. Turning on the web search option in Claude and o3 will get them to work as mini Deep Research tools, doing some web research, but not as elaborately as a full report. Google has some fun additional options once you have created a report, letting you turn it into an infographic, a quiz or a podcast.

An Easy Approach to AI: Voice Mode

An easy way to use AI is just to start with voice mode. The two best implementations of voice mode are in the Gemini app and ChatGPT’s app and website. Claude’s voice mode is weaker than the other two systems. What makes voice mode great is that you can just have a natural conversation with the app while in the car or on a walk and get quite far in understanding what these models can do. Note the models are optimized for chat (including all of the small pauses and intakes of breath designed to make it feel like you are talking to a person), so you don’t get access to the more powerful models this way. They also don’t search the web as often which makes them more likely to hallucinate if you are asking factual questions: if you are using ChatGPT, unless you hear the clicking sound at 44 seconds into this clip, it isn’t actually searching the web.

Voice mode's killer feature isn't the natural conversation, though, it's the ability to share your screen or camera. Point your phone at a broken appliance, a math problem, a recipe you're following, or a sign in a foreign language. The AI sees what you see and responds in real-time. I've used it to identify plants on hikes, solve a problem on my screen, and get cooking tips while my hands were covered in flour. This multimodal capability is genuinely futuristic, yet most people just use voice mode like Siri. You're missing the best part.

Making Things for You: Images, Video, Code, and Documents

ChatGPT and Gemini will make images for you if you ask (Claude cannot). ChatGPT offers the most controllable image creation tool, Gemini uses two different image generation tools, Imagen, a very good traditional image generation system, and a multimodal image generation system. Generally, ChatGPT is stronger. On video creation, however, Gemini’s Veo 3 is very impressive, and you get several free uses a day (but you need to hit the Video button in the interface)

All three systems can produce a wide variety of other outputs, ranging from documents to statistical analyses to interactive tools to simulations to simple games. To get Gemini or ChatGPT to do this reliably, you need to select the Canvas option when you want these systems to run code or produce separate outputs. Claude is good at creating these sorts of outputs on its own. Just ask, you may be surprised what the AI systems can make.

Working with an AI

Now that you have picked a model, you can start chatting with it. It used to be that the details of your prompts mattered a lot, but the most recent AI models I suggested can often figure out what you want without the need for complex prompts. As a result, many of the tips and tricks you see online for prompting are no longer as important for most people. At the Generative AI Lab at Wharton, we have been trying to examine prompting techniques in a scientific manner, and our research has shown, for example, that being polite to AI doesn’t seem to make a big difference in output quality overall1. So just approach the AI conversationally rather than getting too worried about saying exactly the right thing.

That doesn’t mean that there is no art to prompting. If you are building a prompt for other people to use, it can take real skill to build something that works repeatedly. But for most people you can get started by keeping just a few things in mind:

• Give the AI context to work with. Most AI models only know basic user information and the information in the current chat, they do not remember or learn about you beyond that. So you need to provide the AI with context: documents, images, PowerPoints, or even just an introductory paragraph about yourself can help - use the file option to upload files and images whenever you need. The AIs can do some of these ChatGPT and Claude can access your files and mailbox if you let them, and Gemini can access your Gmail, so you can ask them to look up relevant context automatically as well, though I prefer to give the context manually.

• Be really clear about what you want. Don’t say “Write me a marketing email,” instead go with “I'm launching a B2B SaaS product for small law firms. Write a cold outreach email that addresses their specific pain points around document management. Here's the details of the product: [paste]” Or ask the AI to ask you questions to help you clarify what you want.

• Give it step-by-step directions. Our research found this approach, called Chain-of-Thought prompting, no longer improves answer quality as much as it used to. But even if it doesn’t help that much, it can make it easier to figure out why the AI came up with a particular answer.

• Ask for a lot of things. The AI doesn’t get tired or resentful. Ask for 50 ideas instead of 10, or thirty options to improve a sentence. Then push the AI to expand on the things you like.

• Use branching to explore alternatives. Claude, ChatGPT, and Gemini all let you edit prompts after you have gotten an answer. This creates a new “branch” of the conversation. You can move between branches by using the arrows that appear after you have edited an answer. It is a good way to learn how your prompts impact the conversation.

Troubleshooting

I also have seen some fairly common areas where people get into trouble:

• Hallucinations: In some ways, hallucinations are far less of a concern than they used to be, as AI has improved and newer AI models are better at not hallucinating. However, no matter how good the AI is, it will still make errors and mistakes and still give you confident answers where it is wrong. They also can hallucinate about their own capabilities and actions. Answers are more likely to be right when they come from the bigger, slower models, and if the AI did web searches. The risk of hallucination is why I always recommend using AI for topics you understand until you have a sense for their capabilities and issues.

• Not Magic: You should remember that the best AIs can perform at the level of a very smart person on some tasks, but current models cannot provide miraculous insights beyond human understanding. If the AI seems like it did something truly impossible, it is probably not actually doing that thing but pretending it did. Similarly, AI can seem incredibly insightful when asked about personal issues, but you should always take these insights with a grain of salt.

• Two Way Conversation: You want to engage the AI in a back-and-forth interaction. Don’t just ask for a response, push the AI and question it.

• Checking for Errors: The AI doesn’t know “why” it did something, so asking it to explain its logic will not get you anywhere. However, if you find issues, the thinking trace of AI models can be helpful. If you click “show thinking” you can find out what the model was doing before giving you an answer. This is not always 100% accurate (you are actually getting a summary of the thinking) but is a good place to start.

Your Next Hour

So now you know where to start. First, pick a system and resign yourself to paying the $20 (the free versions are demos, not tools). Then immediately test three things on real work: First, switch to the powerful model and give it a complex challenge from your actual job with full context and have an interactive back and forth discussion. Ask it for a specific output like a document or program or diagram and ask for changes until you get a result you are happy with. Second, try Deep Research on a question where you need comprehensive information, maybe competitive analysis, gift ideas for someone specific, or a technical deep dive. Third, experiment with voice mode while doing something else — cooking, walking, commuting — and see how it changes your ability to think through problems.

Most people use AI like Google at first: quick questions, no context, default settings. You now know better. Give it documents to analyze, ask for exhaustive options, use branching to explore alternatives, experiment with different outcomes. The difference between casual users and power users isn't prompting skill (that comes with experience); it's knowing these features exist and using them on real work.

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