Anthropic
claude-2.1
☠ Dead
Yes. claude-2.1 was shut down on July 21, 2025. Requests to it fail.
Recommended replacement: claude-opus-4-8
Source: Anthropic deprecation page, announced January 21, 2025.
Is it still in your code?
Paste a file or a public GitHub repo URL into the scanner. It finds every model ID that is dead or dying, with the file and line, in your browser.
Scan my code for claude-2.1 and the rest →
Or one line in a terminal or in CI (fails if a dead ID is found): curl -sL https://lira-ia.github.io/model-check/check.py | python3 - . · GitHub Action