System Card: Claude Mythos Preview [pdf]

Post by TypesWillSaveUs » Tue, Apr 07, 2026, 8:01 PM UTC

cedws wrote: post #80

Jcampuzano2 wrote: post #59

Earlier quoted context omitted.

A jump that we will never be able to use since we're not part of the seemingly minimum 100 billion dollar company club as requirement to be allowed to use it. I get the security aspect, but if we've hit that point any reasonably sophisticated model past this point will be able to do the damage they claim it can do. They might as well be telling us they're closing up shop for consumer models. They should just say they…

More than killer AI I'm afraid of Anthropic/OpenAI going into full rent-seeking mode so that everyone working in tech is forced to fork out loads of money just to stay competitive on the market. These companies can also choose to give exclusive access to hand picked individuals and cut everyone else off and there would be nothing to stop them. This is already happening to some degree, GPT 5.3 Codex's security capabil…

Post by simianwords » Tue, Apr 07, 2026, 8:02 PM UTC

ollin wrote: post #93

simianwords wrote: post #61

Earlier quoted context omitted.

The real part is SWE-bench Verified since there is no way to overfit. That's the only one we can believe.

My impression was entirely the opposite; the unsolved subset of SWE-bench verified problems are memorizable (solutions are pulled from public GitHub repos) and the evaluators are often so brittle or disconnected from the problem statement that the only way to pass is to regurgitate a memorized solution. OpenAI had a whole post about this, where they recommended switching to SWE-bench Pro as a better (but still imperf…

Post by FeepingCreature » Tue, Apr 07, 2026, 8:03 PM UTC

IceWreck wrote: post #114

mpalmer wrote: post #4

> Claude Mythos Preview’s large increase in capabilities has led us to decide not to make it generally available. A month ago I might have believed this, now I assume that they know they can't handle the demand for the prices they're advertising.

Didn't OpenAI say something similar about GPT-3? Too dangerous to open source and then afew years later tehy were open sourcing gpt-oss because a bunch of oss labs were competing with their top models.

Post by bornfreddy » Tue, Apr 07, 2026, 8:04 PM UTC

jdthedisciple wrote: post #140

Opus 4.6 is already incredible so this leap is huge. Although, amusingly, today Opus told me that the string 'emerge' is not going to match 'emergency' by using `LIKE '%emerge%'` in Sqlite Moment of disappointment. Otherwise great.

Post by unglaublich » Tue, Apr 07, 2026, 8:06 PM UTC

NinjaTrance wrote: post #66

Interesting reading. They are still focusing on "catastrophic risks" related to chemical and biological weapons production; or misaligned models wreaking havoc. But they are not addressing the elephant in the room: * Political risks, such as dictators using AI to implement opressive bureaucracy. * Socio-economic risks, such as mass unemployement.