AI Briefing
KO

Opus 4.7 Switches to Adaptive Thinking

·2026.04.17 02:29

Key point

Manual extended thinking has disappeared in Opus 4.7, leaving only adaptive thinking.

Details

Anthropic has removed the manual extended thinking configuration in Claude Opus 4.7, supporting only adaptive thinking.

Now, instead of a fixed thinking token budget, Claude decides on its own when and how much reasoning to use depending on the complexity of the request.

  • Opus 4.7: no longer accepts manual thinking configuration
  • Opus 4.6 / Sonnet 4.6: adaptive thinking available
  • Claude Mythos Preview: automatically applied when thinking is empty
  • Opus 4.6 has effectively been operating as a pilot for adaptive thinking for the past 2 weeks

The post argues that this change directly affects users doing complex work, and that users should be able to choose the reasoning intensity and token consumption per message.

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