# Anthropic outage

> Anthropic posted “Elevated errors for Claude Mythos 5, Claude Fable 5, and Claude Sonnet 5” at 14:33 UTC.

Canonical: https://rewindex.com/events/2026-08-13-anthropic
Last updated: 2026-08-13T15:00:00Z

Anthropic posted “Elevated errors for Claude Mythos 5, Claude Fable 5, and Claude Sonnet 5” at 14:33 UTC.
- Window: 2026-08-13 14:00 UTC to 2026-08-14 01:00 UTC
- Provider: Anthropic
- Linked: 5 incidents at 4 vendors; 4 vendors named the provider, 4 as the cause
- Day roundup: [2026-08-13](https://rewindex.com/outages/2026-08-13.md) · [All events](https://rewindex.com/events.md)

A link means an incident named the provider (or another affected vendor, or is a known dependency); it is not a confirmed cause.
## Linked incidents

| Started (UTC) | Vendor | Incident | Impact (vendor label) | Link |
| --- | --- | --- | --- | --- |
| 2026-08-13 14:33 UTC | Anthropic / Claude | [Elevated errors for Claude Mythos 5, Claude Fable 5, and Claude Sonnet 5](https://rewindex.com/company/anthropic/incidents/j160kkjmm2n1.md) | major | provider’s own post |
| 2026-08-13 14:40 UTC | Bolt.new | [\[Dependency Check\] Anthropic](https://rewindex.com/company/bolt-new/incidents/01KZXS1Y8G2BX7RABVJWQD3SP7.md) | none | named the provider as cause |
| 2026-08-13 14:43 UTC | GitHub / GitHub Copilot | [Errors with the Fable 5 Model in Copilot](https://rewindex.com/company/github/incidents/24t8gsgqx2qb.md) | minor | named the provider as cause |
| 2026-08-13 14:45 UTC | GitHub / GitHub Copilot | [Incident with Webhooks](https://rewindex.com/company/github/incidents/k8vbzwqjkxzn.md) | minor | timing only |
| 2026-08-13 14:46 UTC | xAI | [Investigating service degradation — Automations, Cloud Agents, and IDE](https://rewindex.com/company/xai/incidents/8gbqbmsmq7cy.md) | minor | named the provider as cause |
| 2026-08-14 00:36 UTC | Anthropic / Claude | [Service disruption on Claude Code on the web and related services](https://rewindex.com/company/anthropic/incidents/whnd2z49x3xf.md) | minor | provider’s own post |
| 2026-08-14 00:45 UTC | Bolt.new | [\[Dependency Check\] Anthropic](https://rewindex.com/company/bolt-new/incidents/01KZYVNTB89M9G256RGQBJ35JS.md) | none | named the provider as cause |

## Also happening (same window, not linked)

| Started (UTC) | Vendor | Incident |
| --- | --- | --- |
| 2026-08-13 14:46 UTC | Cursor | [Investigating service degradation — Automations, Cloud Agents, and IDE](https://rewindex.com/company/cursor/incidents/8gbqbmsmq7cy.md) |


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Canonical: https://rewindex.com/events/2026-08-13-anthropic · Markdown: https://rewindex.com/events/2026-08-13-anthropic.md · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-11T05:27:13.832Z