It seems I was wrong. American AI companies might actually be benchmaxxing harder.
All models have probably memorized significant swaths of solution sets for popular benchmarks at this point, either accidentally or intentionally, so it's all relative at this point. However, in our experience, Chinese models do benchmax harder. This is also consistent with interacting with Chinese labs soliciting data/environments, who literally asked us for datasets and tasks modeled around and formatted like popular benchmarks.
Opus 5 will be uploaded tomorrow, but we already have the tests locally and it is truly as capable as Fable, but at 81% of the real cost. (And from subjective usage, it has a very different personality)
Data at https://gertlabs.com/rankings
Now I am not really specifically accusing Anthropic of anything here, I'm just saying their behavior is suspicious. Since you tested Fable, they wouldn't even have to lie to have optimized for your specific benchmarks, since they absolutely had permission to read your sessions if they wanted to. But obviously, that's only the situation if we take them at their word. Personally I would be a bit surprised if they just flat out were lying and secretly retaining data they say they are not, but not that surprised. The penalties for doing this are probably worth the rewards if it keeps them super far ahead in the benchmarks for years without anyone catching on.
(In actuality though, even if they really were trying to sneakily grab samples of benchmark tests via their Fable data retention rules, I don't really suspect there would've been very much time to optimize Opus 5 on it. So consider me bothered.)