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Anthropic Says Claude Hit by Elevated Errors Across Multiple Models

Anthropic confirmed Sept. 3 outages on Claude models including Opus 5 and Mythos 5.1; a fix is underway.

Android Authority reported that a growing number of users were also reporting problems on the same day. The publication said it would update its article once all services were back online.

Editor's Summary

Anthropic acknowledged elevated error rates affecting multiple Claude models on Sept. 3, 2026. The company said it identified the cause and is working on a fix. The outage touched both flagship and older models, including Opus 5 and Mythos 5.1.