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Claude API · SOURCE REVIEWED 2026-09-29

claude-mythos-preview

Direct provider API only; other hosting platforms may use different schedules.

Retirement timeline

Shutdown date
No confirmed shutdown date
Announcement date
2026-06-09
Recommended replacement
Consult current provider guidance
Read official announcement ↗

Your migration checklist

This is a planning checklist, not a guarantee of drop-in compatibility.

  1. Find this exact model ID in your environment variables, code, and scheduled jobs.
  2. Read the provider’s current model documentation and confirm access to the replacement.
  3. Test prompts, tools, structured output, latency, and cost with representative requests.
  4. Roll out gradually, monitor failures, and keep a tested rollback path.
Provider model documentation ↗

Calendar includes 90-, 30-, and 7-day reminders. Your calendar app controls notification delivery.

Dates apply to Claude API. Verify separately for Azure, Bedrock, Vertex AI, and consumer chat apps.