Elasticsearch outage: Elevated error rates for Claude Sonnet 4.5 EIS inference endpoints

Affected components

• Elastic Inference Service

1. resolvedMar 30, 2026, 19:57 UTC

   Endpoints are operating normally

2. investigatingMar 30, 2026, 18:46 UTC

   We're seeing elevated 5xx error rates for the Claude Sonnet 4.5 model in EIS. The following default inference endpoints are affected: - .anthropic-claude-4.5-sonnet-chat_completion - .anthropic-claude-4.5-sonnet-completion - .gp-llm-v2-chat_completion - .gp-llm-v2-completion We're investigating and will update again in 2 hours or if there's a change in status.

What APIStatus.watch saw

Our 5-minute checks didn't record a change in Elasticsearch's overall status around this incident. Smaller or regional incidents often leave a provider's overall status green.

Other services with incidents at the same time

Overlapping incidents aren't necessarily related.

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How often does Elasticsearch have incidents?

Elasticsearch reported 23 incidents in the last 90 days, 20 of them major or critical. A typical incident lasted 3h 35m. See Elasticsearch's uptime and incident history