I heavily A/B tested Opus vs Sol for two weeks, giving Claude Code and Codex the same tasks and comparing the results. In my experience Sol is much closer to Opus than to Fable, with Opus often beating Sol. The only area where Sol is better is code reviews, which these benchmarks confirm. I wish they included Fable.
Comments
Given that Fable is a Sol-class model, should Astra not be compared to Mythos in those tests?
I heavily A/B tested Opus vs Sol for two weeks, giving Claude Code and Codex the same tasks and comparing the results. In my experience Sol is much closer to Opus than to Fable, with Opus often beating Sol. The only area where Sol is better is code reviews, which these benchmarks confirm. I wish they included Fable.