LaunchDevelopersSeptember 9, 2026

Claude Code 2.1.267 adds maxEffortLevel cap across providers

The release ships 53 CLI changes, led by a maxEffortLevel setting (top-level or per model under modelSettings) that caps effort on Bedrock, Vertex and Foundry while letting users pick lower. A --system-prompt-snapshot off flag re-renders the system prompt each request for prompt iteration.

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Claude Code 2.1.267 adds maxEffortLevel cap across providers