Claude Sonnet 5 experienced degraded performance affecting both claude.ai and api.anthropic.com for approximately 19 minutes on August 3, 2026. Anthropic investigated elevated error rates, which returned to baseline by 15:20 UTC. The incident was resolved with no further action required.
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As of 15:20 UTC (8:20am PT), error rates on Claude Sonnet 5 have returned to baseline. This incident is resolved.
We are currently investigating this issue.
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