Anthropic Hit by Major Claude Outage Across Web and API

Anthropic is investigating a major outage affecting claude.ai, its API and degraded Claude Opus 5 performance with elevated error rates. The engineering team is working on the issue and has promised updates soon.

2026-08-17 ~ 2026-08-17 · 4 related posts

• Major outage reported at Anthropic — shaunralston · 2026-08-17
• Anthropic Updates on Claude Service Outage — ClaudeAI-mod-bot · 2026-08-17
• Anthropic Claude experiencing major outage — Polymarket · 2026-08-17
• Claude Opus 5 experiences degraded performance; Anthropic investigating — ClaudeAI-mod-bot · 2026-08-17