# Anthropic in November 2025: incidents, uptime and changes

> Anthropic in November 2025: 26 incidents on its status page (7 major or critical), 97.73% free of major or critical incidents (vendor-reported). From Rewindex’s archive of Anthropic’s status, pricing and policy pages.

Canonical: https://rewindex.com/company/anthropic/2025/11
Last updated: 2025-12-01T00:00:00Z

- Incidents posted: 26 (major/critical: 7) · Maintenance: 0
- By vendor impact label: critical 1, major 6, minor 14, none 5
- Uptime (vendor-reported): 97.73% free of major/critical incidents, 93.00% free of any incident; outage time 16 h 18 min, incident time 2.1 days
- Price changes: 0 · Pricing/legal/trust page changes: 0 · Deprecations: 0 · CVEs: 0
- Previous month: [October 2025](https://rewindex.com/company/anthropic/2025/10.md) · Next: [December 2025](https://rewindex.com/company/anthropic/2025/12.md) · [All months](https://rewindex.com/company/anthropic/reports.md) · [Anthropic](https://rewindex.com/company/anthropic.md)

_Uptime: Derived from the incidents the vendor posted on its own status page, not measured by us. A minute counts as an outage minute when a major or critical incident (as the vendor labelled it) was open; incident minutes include minor ones too. Maintenance and incidents marked "no impact" are left out, overlapping incidents are merged, a resolved incident counts for at most 7 days, and one still open with no resolution counts for at most 24 hours._

## Major and critical incidents

| Incident | Impact (vendor label) | Started (UTC) | Resolved (UTC) | Duration | Status |
| --- | --- | --- | --- | --- | --- |
| [Elevated errors on claude.ai](https://rewindex.com/company/anthropic/incidents/p0svq4j6sk04.md) | critical | 2025-11-18 12:03 UTC | 2025-11-18 15:20 UTC | 3.3 h | resolved |
| [Issues with Claude.ai Research](https://rewindex.com/company/anthropic/incidents/9gm98llzp382.md) | major | 2025-11-17 14:56 UTC | 2025-11-17 18:33 UTC | 3.6 h | resolved |
| [Elevated errors on Sonnet 4, Sonnet 4.5 and Haiku 4.5](https://rewindex.com/company/anthropic/incidents/xbbf1wq2dlz7.md) | major | 2025-11-20 08:10 UTC | 2025-11-20 12:03 UTC | 3.9 h | resolved |
| [Elevated error rates on the API](https://rewindex.com/company/anthropic/incidents/538r2y9cjmhk.md) | major | 2025-11-23 13:05 UTC | 2025-11-23 14:11 UTC | 1.1 h | resolved |
| [Elevated Error Rates on the API](https://rewindex.com/company/anthropic/incidents/1y63m9yzpjn2.md) | major | 2025-11-25 09:34 UTC | 2025-11-25 10:42 UTC | 1.1 h | resolved |
| [Elevated errors for requests to Claude Opus 4.5](https://rewindex.com/company/anthropic/incidents/5g213mxxlbsw.md) | major | 2025-11-25 20:56 UTC | 2025-11-25 23:44 UTC | 2.8 h | resolved |
| [Elevated errors for requests to Claude Haiku 4.5](https://rewindex.com/company/anthropic/incidents/1wr14y0b18bj.md) | major | 2025-11-30 14:06 UTC | 2025-11-30 14:35 UTC | 29 min | resolved |

## All incidents

| Incident | Impact (vendor label) | Started (UTC) | Resolved (UTC) | Duration | Status |
| --- | --- | --- | --- | --- | --- |
| [Elevated errors for requests to Claude 4 Sonnet](https://rewindex.com/company/anthropic/incidents/tfh4xcb9jzn3.md) | minor | 2025-11-01 06:21 UTC | 2025-11-01 06:55 UTC | 34 min | resolved |
| [Degraded outputs quality from Haiku 4.5](https://rewindex.com/company/anthropic/incidents/4k5y2v7rx9hb.md) | minor | 2025-11-04 22:09 UTC | 2025-11-05 17:41 UTC | 20 h | resolved |
| [Elevated errors on claude.ai/code (Claude Code on the web)](https://rewindex.com/company/anthropic/incidents/3tyq3gbfj0k6.md) | minor | 2025-11-05 03:06 UTC | 2025-11-05 03:07 UTC | 1 min | resolved |
| [Elevated errors for requests to Claude Sonnet 4.5](https://rewindex.com/company/anthropic/incidents/hf246wspvzdt.md) | minor | 2025-11-07 06:57 UTC | 2025-11-07 08:32 UTC | 1.6 h | resolved |
| [Elevated errors for requests to Claude 4, 4.5 Sonnet and 4.5 Haiku](https://rewindex.com/company/anthropic/incidents/tgtw1sqs9ths.md) | none | 2025-11-07 14:29 UTC | 2025-11-07 14:56 UTC | 27 min | resolved |
| [Elevated error rates on Files API](https://rewindex.com/company/anthropic/incidents/5l56lb3k3p1t.md) | none | 2025-11-07 17:59 UTC | 2025-11-07 19:26 UTC | 1.4 h | resolved |
| [Elevated error rates for code execution tool](https://rewindex.com/company/anthropic/incidents/tp0pm7zqm5lg.md) | minor | 2025-11-07 22:47 UTC | 2025-11-07 22:47 UTC | 0 min | resolved |
| [Elevated errors on Claude.ai](https://rewindex.com/company/anthropic/incidents/4kv6xfjg5cz2.md) | none | 2025-11-11 12:59 UTC | 2025-11-11 13:39 UTC | 40 min | resolved |
| [Elevated errors on Claude.ai](https://rewindex.com/company/anthropic/incidents/h46s65s799ch.md) | minor | 2025-11-11 20:50 UTC | 2025-11-11 22:44 UTC | 1.9 h | resolved |
| [Elevated error rates with Sonnet 4.5 and Opus 4.1](https://rewindex.com/company/anthropic/incidents/4t6zrdblnxdy.md) | none | 2025-11-14 00:15 UTC | 2025-11-14 00:40 UTC | 25 min | resolved |
| [Elevated errors for requests to Claude 4.1 Opus](https://rewindex.com/company/anthropic/incidents/v12r33t2y7w8.md) | minor | 2025-11-14 09:56 UTC | 2025-11-14 10:46 UTC | 50 min | resolved |
| [issues with Claude Code remote and claude.ai file creation](https://rewindex.com/company/anthropic/incidents/ry83c33qm9kt.md) | minor | 2025-11-17 14:00 UTC | 2025-11-17 15:14 UTC | 1.2 h | resolved |
| [Issues with Claude.ai Research](https://rewindex.com/company/anthropic/incidents/9gm98llzp382.md) | major | 2025-11-17 14:56 UTC | 2025-11-17 18:33 UTC | 3.6 h | resolved |
| [Elevated error rates to Sonnet 4.5 on Claude Code](https://rewindex.com/company/anthropic/incidents/4bvvh93qjl25.md) | minor | 2025-11-18 08:55 UTC | 2025-11-18 09:52 UTC | 57 min | resolved |
| [Elevated errors on claude.ai](https://rewindex.com/company/anthropic/incidents/p0svq4j6sk04.md) | critical | 2025-11-18 12:03 UTC | 2025-11-18 15:20 UTC | 3.3 h | resolved |
| [Increased error rate on Claude 4 Sonnet](https://rewindex.com/company/anthropic/incidents/k1tz1gsmm4b1.md) | minor | 2025-11-19 02:00 UTC | 2025-11-19 05:27 UTC | 3.5 h | resolved |
| [Elevated errors on Sonnet 4, Sonnet 4.5 and Haiku 4.5](https://rewindex.com/company/anthropic/incidents/xbbf1wq2dlz7.md) | major | 2025-11-20 08:10 UTC | 2025-11-20 12:03 UTC | 3.9 h | resolved |
| [Elevated error rates on the API](https://rewindex.com/company/anthropic/incidents/538r2y9cjmhk.md) | major | 2025-11-23 13:05 UTC | 2025-11-23 14:11 UTC | 1.1 h | resolved |
| [Elevated Errors on Claude Code](https://rewindex.com/company/anthropic/incidents/j7lh1qm56hwr.md) | none | 2025-11-24 16:00 UTC | 2025-11-24 16:00 UTC | 0 min | resolved |
| [Model usage attribution issues](https://rewindex.com/company/anthropic/incidents/4w17zgs3tflt.md) | minor | 2025-11-24 18:15 UTC | 2025-11-24 19:43 UTC | 1.5 h | resolved |
| [Elevated Error Rates on the API](https://rewindex.com/company/anthropic/incidents/1y63m9yzpjn2.md) | major | 2025-11-25 09:34 UTC | 2025-11-25 10:42 UTC | 1.1 h | resolved |
| [Elevated errors for requests to Claude Opus 4.5](https://rewindex.com/company/anthropic/incidents/5g213mxxlbsw.md) | major | 2025-11-25 20:56 UTC | 2025-11-25 23:44 UTC | 2.8 h | resolved |
| [Elevated errors for requests to Claude 4.5 Sonnet 1M](https://rewindex.com/company/anthropic/incidents/k01mpjb8k6r4.md) | minor | 2025-11-27 09:10 UTC | 2025-11-27 09:40 UTC | 30 min | resolved |
| [Elevated errors for requests to Claude Haiku 4.5](https://rewindex.com/company/anthropic/incidents/1wr14y0b18bj.md) | major | 2025-11-30 14:06 UTC | 2025-11-30 14:35 UTC | 29 min | resolved |
| [Elevated errors on Sonnet 4.5](https://rewindex.com/company/anthropic/incidents/55p5hxp0wf3h.md) | minor | 2025-11-30 18:57 UTC | 2025-11-30 21:16 UTC | 2.3 h | resolved |
| [Unable to enable extended thinking on first message](https://rewindex.com/company/anthropic/incidents/xdd8z923lknw.md) | minor | 2025-11-30 19:15 UTC | 2025-11-30 19:38 UTC | 23 min | resolved |

## Cite this

Anthropic posted 26 status incidents in November 2025 (7 major or critical); 0 price changes and 0 notable page changes observed.

- Canonical URL: https://rewindex.com/company/anthropic/2025/11
- Citation: Anthropic, “Anthropic in November 2025” (2025-11-01 00:00 UTC). Archived by Rewindex: https://rewindex.com/company/anthropic/2025/11 (CC BY 4.0).
- Markdown link: `[Anthropic: Anthropic in November 2025 (2025-11-01)](https://rewindex.com/company/anthropic/2025/11)`


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Canonical: https://rewindex.com/company/anthropic/2025/11 · Markdown: https://rewindex.com/company/anthropic/2025/11.md · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-04T13:30:18.794Z