# Claude: Unable to enable extended thinking on first message

> Claude status incident “Unable to enable extended thinking on first message” on 2025-11-30: impact minor (vendor’s label), 23 min, 1 update(s). Archived by Rewindex.

Canonical: https://rewindex.com/company/claude/incidents/xdd8z923lknw
Last updated: 2025-11-30T19:38:00Z

- Impact (vendor’s label): minor
- Status: resolved
- Started: 2025-11-30 19:15 UTC · Resolved: 2025-11-30 19:38 UTC · Duration: 23 min
- Updates: 1
- [Vendor status page: https://status.claude.com/incidents/xdd8z923lknw](https://status.claude.com/incidents/xdd8z923lknw)
- [Company: Claude](https://rewindex.com/company/claude.md)

## Timeline of updates

- **resolved** 2025-11-30 19:38 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._

## Cite this

Status incident (vendor impact label: minor) posted by Claude, started 2025-11-30 19:15 UTC, resolved after 23 min, 1 update(s).

- Canonical URL: https://rewindex.com/company/claude/incidents/xdd8z923lknw
- Citation: Claude, “Unable to enable extended thinking on first message” (2025-11-30 19:15 UTC). Archived by Rewindex: https://rewindex.com/company/claude/incidents/xdd8z923lknw (CC BY 4.0).
- Markdown link: `[Claude: Unable to enable extended thinking on first message (2025-11-30)](https://rewindex.com/company/claude/incidents/xdd8z923lknw)`


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Canonical: https://rewindex.com/company/claude/incidents/xdd8z923lknw · Markdown: https://rewindex.com/company/claude/incidents/xdd8z923lknw.md · JSON: https://rewindex.com/api/v1/companies/claude/incidents/xdd8z923lknw · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-04T13:08:03.229Z