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We've retired the Claude Opus 4.1 model (claude-opus-4-1-20250805).

We've retired the Claude Opus 4.1 model (claude-opus-4-1-20250805). All requests to this model will now return an error. We recommend upgrading to Claude Opus 5. Researchers can request ongoing access

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We've retired the Claude Opus 4.1 model (claude-opus-4-1-20250805).

We've retired the Claude Opus 4.1 model (claude-opus-4-1-20250805). All requests to this model will now return an error. We recommend upgrading to Claude Opus 5. Researchers can request ongoing access through the External Researcher Access Program.

출처: Claude Platform 릴리스 노트 (원문 보기)

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