LaunchDevelopersSeptember 25, 2026

Claude Code 2.1.283 adds gateway prompt-ID headers and model allowlists

Read original source →code.claude.com

Version 2.1.283 adds x-claude-code-prompt-id gateway hint headers (opt in via CLAUDE_CODE_GATEWAY_HINT_HEADERS=1) so LLM gateways can group requests serving one prompt. New managed settings availableModelsMatch:"exact" and deniedModels restrict which model versions are permitted.

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