CATCH #546
DETECTED AUG 5, 2026 20:23 UTC
THE CATCHscore 10/10
EXHIBIT 546 · FLASH
Aug 5, 2026 20:23 UTC
docs
https://platform.claude.com/docs/en/release-notes/api
Anthropic has retired the Claude Opus 4.1 model, recommending an upgrade to Claude Opus 5. Researchers can request continued access via the External Researcher Access Program.
READY TO POST:
anthropic just retired claude opus 4.1. time to upgrade to opus 5 if you were using it!
looks like opus 4.1 is deprecated on the anthropic api. researchers can still get access through a program, but otherwise, opus 5 is the way to go.
EVIDENCE — the receipts
Anthropic API changelog changed: https://platform.claude.com/docs/en/release-notes/api
7 added lines
---
+++
@@ -143,2 +143,9 @@
Inference hooks
+.
+We've retired the Claude Opus 4.1 model (
+claude-opus-4-1-20250805
+). All requests to this model will now return an error. We recommend upgrading to
+Claude Opus 5
+. Researchers can request ongoing access through the
+External Researcher Access Program
.
caught by the 20-minute sweep ·
the live wire · all receipts