LessWrong posts by zvi

This is part 2 of the weekly, broadly covering speculation, rhetoric and policy, along with alignment research. This does not cover the release of GPT-5.6-Sol. As always, I will be taking a few days to digest what the new model has to offer and to allow others to try it and react. I will cover Sol and its capabilities early next week. I covered the GPT-5.6 system card back on June 28. This also do...

Enough things added up that this week is getting split into two parts. Then on Monday, if all goes as I expect, we’ll cover OpenAI's Sol, aka GPT-5.6. OpenAI also gave us an upgraded voice mode, which I haven’t tried out but early reports are that it is a step change. AI writing, especially Claude writing, is becoming more prominent and harder not to notice, and increasingly a tough read when enco...

We have a respite, so I thought I’d tackle various thoughts on children, phones and screens. GPT-5.6-Sol drops tomorrow, and the Fable agents are hard at work. I’ll start with the other screens, then finish with the phones. Table of Contents EdTech. NonEdTech. Do Not Ban Social Media Outright. Some Modern Kids Media Is Pretty Great. Ban Phones In Schools (1). Your Offer Is Acceptable. Ban Phones I...

There is a new very cool Anthropic paper: Verbalizable Representations Form a Global Workspace in Language Models. You can read the blog post verison here. I encourage reading of the whole original blog post or paper, if you have the time. Table of Contents Through A Different Lens. Establishing J-Space As A Global Workspace. Are You Pondering What I’m Pondering? Assistant J. The Power Of Virtuous...

The blip is over. We have Fable back. Utah teapot: happy fable/mythos easter Wednesday, to those who celebrate Here is the official letter restoring Fable, great job everyone. Notice it is addressed to Tom Brown, not to Dario Amodei. Anthropic had to make the controls more stupid for now, but this is a big win. j⧉nus: YES!!! I’m really proud of Anthropic for their successful negotiation with the g...

Fable's back. Back again. Fable's back. Tell a friend. Use your free week to its fullest. This is excellent news. The blip only lasted a few weeks. It was still a fiasco, and we have to deal with the fallout. Our system remains fully ad hoc. The precedent has been set that we may use export controls on models, or order them taken down on 90 minutes of notice based on a misunderstanding. At least s...

Fable 5 is back today, baby! Premium subscribers have one week to use it within their subscriptions. First hit's free. Then you pay by the token. Today's post is still about Sonnet 5. I don’t know that there will be much call for Sonnet 5 for most purposes, given Opus 4.8 exists and especially now that Fable 5 is once again available, but this is what we do here, so sure, why not, system card time...

We, or at least ‘more than 100 American institutions,’ got Mythos back this week. What we the people do not have is Fable or Sol. While we wait for both Claude Fable 5 and GPT-5.6-Sol, today we instead got Claude Sonnet 5. As usual it will take a few days to get a handle on the new model. In this case, Anthropic is representing it as a cheaper and faster version of Opus 4.8, so even though the num...

The Wall Street Journal printed an outright false headline and heavily misleading story claiming this, which of course was uncritically amplified by the usual suspects. I post this now on its own so that we have a place to link to, to explain the situation. Headline News WSJ Headline (Obvious Nonsense): ​China Has Matched Anthropic in Cybersecurity, Resetting AI Race. That. Did. Not. Happen. The p...

While we wait for a general release, the system card is the best hint as to what is going on with the new candidate for America's Next Top Model, GPT-5.6. This is only an OpenAI model card, so by my standards it's a light read. There's a lot of things that you get in an Anthropic card, that are missing in an OpenAI card. Overall, the card gives a clear and consistent impression that GPT-5.6-Sol is...

We have a new standard policy for releasing frontier AI models. It is not good. We are now, it seems, going to have the White House individually, in an opaque ad hoc manner, deciding who can access which frontier AI models when. One hopes we will at least transition this into a predictable and formal set of procedures for determining what to do. But we spent years not laying the groundwork for doi...

Fable remains in limbo, with renewed hope that we will get it back soon (45% by tomorrow, 69% by July 1, nice.) The full capabilities post is now available. Alex Bores unfortunately lost narrowly in NY-12, and will not be heading to Congress. There are also plenty of other stories to cover. Some highlights: GLM-5.2 is the new best open model, although it is expensive for its class. It will have it...

It does look good, actually. After the odds had dropped quite a bit, they’re looking good again, with a 60% chance of restoration by July 1 and 88% by July 31, in the wake of groundwork looking like it is being laid in various places: leo: BREAKING: Claude Code v2.1.190 introduces several string changes that hint at preparations for a Fable 5 return, with it being permanently included in subscript...

Your monthly hit of all the things that are fit to print without a better place to live. Today is election day here in New York City, so again a reminder that if you are a registered Democrat and live in NY-12 today is the final day to vote for Alex Bores for Congress, and as per my argument yesterday that this matters a lot for ensuring we have a sensible Congressional response to AI. RIP FiveThi...

GLM-5.2 arrived last week. It boasts excellent benchmarks and looks strong. Benchmarks here are a de facto ceiling of how good it is, not a point estimate. Essentially all other aspects of an open model like this, beyond speed and price, will almost always be worse than the numbers suggest. Still, impressive. It is definitely a large step up from GLM-5.1, and likely the strongest open model. GLM-5...

Only three days after the release of Claude Fable 5, Anthropic was forced by the United States Government to make it unavailable, when a jailbreak was brought to its attention, rather than the previous situation of ‘yes obviously experts can jailbreak anything if they care enough’ and ‘yes obviously you can ask Fable to fix your code.’ Three days was enough time for many of us to learn to love Fab...

A lot of things are always happening. Only one story matters. Claude Fable 5 and Claude Mythos 5 were shut down, by the White House, via an imposition of export controls at 5:23pm on Friday, wreaking all sorts of havoc. There was then a scramble. Anthropic flew its people out to Washington, where they met with the Trump Administration on Monday, with hopes expressed that this could be quickly reso...

The mainstream media continues to sleep on the most important story in the world. It has now been two days since Anthropic flew its people out to Washington, and I offered my previous update. We have heard nothing back from those meetings. Prediction market prices have moved rapidly, and have once again stabilized at about a 55% chance of restoration by July 1, 30% by June 26 and 12% by June 19. T...

Fable and Mythos are currently unavailable, but likely will return within a few weeks. I will continue to cover that fiasco, but in the meantime I will also finish my review of Fable, as if it were available, including use of the present tense. As it did with Opus 4.7 and Opus 4.8, this includes a discussion of issues surrounding model welfare. If you want to properly understand Fable, even purely...

On Friday evening the United States Government has forced Anthropic to take down all access to Fable and Mythos. It's been a rough weekend. Dean W. Ball: One thing about AI regulation being haphazardly imposed on just-released, highly performant models is that in a very real sense, the government just made my world *dumber.* In some impressionistic sense I almost always think this is true of gover...

No good policy gets announced shortly after 5pm eastern on a Friday. Here we go again. The Once And Future Fable The United States Department of Commerce, as per a letter from Commerce Secretary Howard Lutnick, apparently in response to a narrow jailbreak identified by Amazon, has classified Fable 5 and Mythos 5 as being subject to US export controls. That explicitly means cutting off access to al...

First things first: Claude Fable 5 is the new best publicly available model. I have noticed a step change, where Fable can suddenly help me in ways that previous models were not worth bothering to query. Almost everything it has noticed in one of my drafts so far has been spot on and it is downright scary. Suddenly I am motivated to once again continue improving my Chrome extension. I only ask for...

A lot happened this week, including a great trip out to Lighthaven. The main event, the one that matters, was the release of Claude Fable 5. The public now has its hands on a Mythos-class model, alongside strong safeguards. As always with a new model, I take a few days to draw in reactions, try out the model and read the system card, before I offer my takes, other than to say this is an extremely...

The big story today is the release of Claude Fable 5, the version of Claude Mythos that Anthropic believes they can safely distribute to the people. You should absolutely be switching over to that model and trying it out. But as always, this blog does not rush into commenting on a new model until we have a few days to play around with it and see what our new baby can (and can’t) do. This will be n...

Right after a new Executive Order seems like an excellent time to offer OpenAI's new document: Democratic Governance of Frontier AI: A Blueprint For A Federal Framework. OpenAI: We also see early signs of recursive self-improvement (RSI) in today's systems: where AI development is itself accelerated by AI. We expect this to increase competitive pressures among developers and nations, and create go...