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The Claude UI still only has "adaptive" reasoning for Opus 4.7, making it functionally useless for scientific/coding work compared to older models (as Opus 4.7 will randomly stop reasoning after a few turns, even when prompted otherwise). There's no way this is just a bug and not a choice to save tokens.

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It was odd that there was no mention of the forced adaptive reasoning in the article. My guess is they don't have enough compute to do anything else here.

They are forcing users to use adaptive thinking now and deprecating thinking.type: "enabled" and budget_tokens. But the web interface (claude.ai), does not support specifying the effort parameter.

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