Companies / Anthropic / changes
Anthropic change history: Elevated errors for multiple models
| When (UTC) | Change | Kind |
|---|---|---|
| Major incident: Elevated errors for multiple models Anthropic reported a major outage with elevated request errors affecting Claude Mythos 5 and 5.1, Claude Fable 5 and 5.1, and Claude Opus 5. The incident started 2026-09-22 00:57 UTC and resolved at 2026-09-22 02:35 UTC (1 h 37 min); Anthropic stated actual impact occurred from 00:50 UTC to 02:10 UTC. | Major incident |