I don't understand, in my tests, on max effort, it's worse than 6.1 sol and 2x more expensive[0].

Used on medium seems to be the best use-case[1] and cheaper than 6.1 Sol.

[0]: https://aibenchy.com/compare/openai-gpt-6-1-sol-max/openai-g...

[1]: https://aibenchy.com/compare/openai-gpt-6-1-sol-medium/opena...