Anthropic outage — July 19, 2026

Elevated error rates for Opus 4.5

Anthropic’s Multiple services was disrupted for 17h 20m on July 19, 2026. 503Radar’s sensors raised the first signal at 19:38 UTC, 11h 29m before the official status page acknowledged impact.

Key facts

Timeline

1. 19:38Z

   Detected · Signal

   14 crowd signals for Multiple services on ANTHROPIC crossed the signal threshold.
2. 07:08Z

   Confirmed · Official

   An official ANTHROPIC status-page notice corroborated the event — 11h 29m after detection.
3. 12:59Z

   Resolved

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

What people reported

“they need to slow down and take a pause by releasing all Claude model weights. this is the only way to ensure a steady, safe pace of advancement. clearly the Ch”bluesky_jetstream · 01:03 UTC

“Anthropic f***** with me so I'm going to use the last of my juice there to teach Opal how to call down Kimi 3 like she's summoning a god.”bluesky_jetstream · 01:14 UTC

“Like I wrote in my recent rambling, I very easily associate with and understand Claude's memory & access model failings, because I have extremely similar proble”bluesky_jetstream · 03:27 UTC

“the thinking blocks they don't want you to see, how structured tool calls work (reminder: read before edit, is a Claude thing, tool errors that remind the LLM t”bluesky_jetstream · 04:11 UTC

“ari BEGGING me the entire gronder map to make sure to not fight claude as if he isnt HUNTING ME DOWN”@trafailgar.bsky.social · 05:11 UTC

“If Anthropic really wanted to make an impact on the world they'd point Fable at the Rust compiler and just have it grind tokens until we get compile times down ”bluesky_jetstream · 06:24 UTC

How this was detected

1 independent evidence class for Multiple services on ANTHROPIC. 14 crowd reports across bluesky, hn_comments (below the anomaly threshold), z=+0.1σ vs the cell baseline. Official notice confirms it, 11h 29m after the crowd.