Anthropic engineer on Claude Code effort levels: low for staying in the loop, max for security audits
trq212 · x · 2026-09-26
Anthropic engineer trq212 published a deep dive on effort levels in Claude Code: the newest Claude models respond to effort without breaking the prompt cache, but users are unsure which level to pick. His practice: effort low is used a lot when staying in the loop; effort max is basically only for fully hands-off runs or hunting security vulnerabilities. The article digs into evals to explain why effort exists and how models behave at each level.
Related event: Anthropic Staff Explains How to Choose Claude Code's Effort Setting(5 posts)→
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