# Anthropic: New chats defaulting to Claude Opus

- Impact (vendor’s label): major
- Status: resolved
- Started: 2025-12-16 19:30 UTC · Resolved: 2025-12-16 20:52 UTC · Duration: 1.4 h
- Updates: 1
- [Vendor status page: https://status.anthropic.com/incidents/z9kwvvpg0hy0](https://status.anthropic.com/incidents/z9kwvvpg0hy0)
- [Company: Anthropic](https://rewindex.com/company/anthropic.md)

## Timeline of updates

- **resolved** 2025-12-16 20:52 UTC: This incident has been resolved.

_From the vendor’s published history: only the final update text is available for incidents before Rewindex began polling this page._


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Canonical: https://rewindex.com/company/anthropic/incidents/z9kwvvpg0hy0 · Markdown: https://rewindex.com/company/anthropic/incidents/z9kwvvpg0hy0.md · JSON: https://rewindex.com/api/v1/companies/anthropic/incidents/z9kwvvpg0hy0 · Generated 2026-10-18T09:45:49.088Z