aiAI Status Monitor

Degraded performance for multiple models

DegradedResolved · started Aug 18, 2026, 4:20 PM UTC (49d ago)

Was Claude down? Anthropic reported “Degraded performance for multiple models” on Aug 18, 2026, 4:20 PM UTC. Full timeline below. This incident affects Claude — see live Claude status. Source: official vendor status feed.

Timeline

  1. Aug 18, 2026, 7:01 PM UTC

    The issue affecting Claude Opus 5 has been resolved. Impact occurred from 16:11 to 18:23 UTC.

  2. Aug 18, 2026, 6:26 PM UTC

    A fix has been implemented and we are monitoring the results.

  3. Aug 18, 2026, 5:12 PM UTC

    We are investigating elevated errors on requests to Claude Opus 5. We will provide an update as soon as possible.

  4. Aug 18, 2026, 4:20 PM UTC

    We are investigating elevated errors on requests to Claude Mythos 5, Claude Fable 5, Claude Opus 5, Claude Sonnet 5, Claude Haiku 4.5, and other Claude models. We will provide an update as soon as possible.

  5. Aug 18, 2026, 4:20 PM UTC

    We are investigating reports of degraded performance affecting multiple models. We will provide an update as soon as possible.

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