Claude Fable 5.2 and Mythos 5.2

I didn't realize that Opus 5.5 was more capable than Fable 5.1 in virtually every category.

So does it cure cancer now?

> However, during the model’s training, we took steps to limit advances in the specific research capabilities that could most directly accelerate AI development. Thus, in relevant areas, including accelerator kernel optimization and improving large language model architectures, Fable 5.2 and Claude Mythos 5.2 perform at about the level of Opus 5.5.

So they are nerfing ML research.

It's pretty sad that they obviously have better models in the pipeline and don't release them yet for strategic reasons.

I knew it, Claude was pretty dumb from last days until now

Very interesting that they set the flagship's version number to 5.2, but their penultimate model is 5.5. Do they want people to to continue to think that Opus is based on more advanced technology? The decision these AI companies make continues to baffle me.

Anyone tried making games with it yet?

Curious to see the Maxxbench score for these

Why dont I feel any urge to even try Fable 5.2 and Mythos 5.2 unless it will force up on me?

Compared Opus 5.5 200 usd a month with Codex 200 usd (Astra High) and Kimi Pro 100 usd a month ... and now have a new conspiracy theory - more their suck your code the better outcome even just over few days time on large code base.

Horrible experience correcting course of Codex and Kimi flow compare to Opus. Opus much more responsive

Dont feel any gain of Codex 200 usd over Codex 100 usd

Kimi Pro feels like a fake Louis Vuitton bag with extreme high material quality and yet still fake ... a bit trash talk ... but clearly seen not so distant future where I can live without Codex and Claude

Using this in CC and immediately getting a cartoonish number of compactions.

The disdain frontier labs have for their users really sucks.

It's shocking to me that when I check threads for new frontier model releases on HN, it's full of people complaining. I, for one, am happy to see the frontier being advanced. These tools are life changing, and I'm extremely thankful for them.

It's weird that they folded Project Glasswing into the CVP, but they're still limiting the new versions of Mythos to "vetted organizations". So Project Glasswing still exists then? Oh well.

Ok come on let’s do a pelican

Every single time I click on these announcements the frontier model ALWAYS scores around ~60-80%. Every. Single. Time. Like, I just went back to the Opus 4.6 + 5 announcements, they were also scoring 60-80%.

https://www.anthropic.com/news/claude-opus-4-6 https://www.anthropic.com/news/claude-opus-5 https://openai.com/index/introducing-gpt-5-3-codex/

For every single announcement, not only do the top models always score 60-80%, the older models somehow start scoring 20-30% (even though previously they were scoring 60%). It's completely unclear whether the methodology changes, how these scores are even evaluated or which domains are being tested. What's worse is that the "benchmarks" keep being updated with no explanation or due process.

google's agy usage is so generous, it might not matter

god bless token resets!

damn

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The end of software is so close, very soon the code itself will be nearly obsolete, there will be schedulers, queues, a database, and the model

stop OPUS 5.5 FUCK, DAMMIT, THEY DIDN’T JUST NERF HIM—THEY ABSOLUTELY OBLITERATED HIM, THE FUCKING MISANTHROPES! I EVEN MADE A MISTAKE IN MY ENGLISH IN THE PREVIOUS SENTENCE—NOW THAT FUCKING CLAUDE IS TEACHING ME ABOUT BUGS!

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cool, and how good does it kill little girls in the middle east?

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