503RADARINCIDENT ARCHIVEMETHODOLOGY
RESOLVED

Anthropic outage — June 3, 2026

Elevated errors for Claude Opus 4.8

Anthropic’s Claude.ai was disrupted for 47d 9h on June 3, 2026.

Key facts

DetectedJune 3, 2026 · 07:13 UTC
Confirmed07:13 UTC
Resolved16:24 UTC
Duration47d 9h
ServiceClaude.ai
Official recordhttps://stspg.io/b4rjxhq1j4nb

Timeline

  1. 07:13Z

    Detected · Signal

    1 crowd signal for Claude.ai on ANTHROPIC crossed the signal threshold.
  2. 07:13Z

    Confirmed · Official

    An official ANTHROPIC status-page notice corroborated the event the same cycle.
  3. 16:24Z

    Resolved

    Signal volume fell back below the threshold; the event was closed.

What people reported

“Claude AI is reportedly down for hundreds of users right now. Are you one of them? #ClaudeDown #Anthropic #ClaudeAiDown https://community.designtaxi.com/topic/3”bluesky_jetstream · 14:20 UTC

How this was detected

1 independent evidence class for claude-ai on ANTHROPIC. 1 crowd report across bluesky (single platform — not corroborating), z=+0.4σ vs the cell baseline. Official notice confirms it.