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Inside Claude Opus 4.7 Adaptive Thinking: How Effort Levels Actually Work

Adaptive thinking replaced manual budget_tokens in Claude Opus 4.7. Here's the architecture: how the five effort levels (low/medium/high/xhigh/max) map to internal token allocation, how task_budget interacts with effort, the thinking display state machine, and the design decisions behind each behavior.

Published May 3, 2026
14 min read
AI

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