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AnthropicClaude API
Mid-conversation system messages are available on Claude Fable 5, Claude Mythos 5, and Claude Opus 4.8, on…
AI summary
Written by AI from the official notes. Check them for exact details.Mid-conversation system messages are now available on specific Claude models without a beta header.
- Available on Claude Fable 5, Mythos 5, and Opus 4.8.
- Accessible via Claude API, Amazon Bedrock, and Google Cloud.
- No beta header required for access.
Why it matters: Users of Claude models should take note for improved conversation management.
Full release notes
- Mid-conversation system messages are available on Claude Fable 5, Claude Mythos 5, and Claude Opus 4.8, on the Claude API, Claude in Amazon Bedrock, and Google Cloud. No beta header is required. This corrects earlier availability notes.