We saw this model disappear from the catalogue on 2026-09-01, and the catalogue carried no shutdown date for it beforehand.
Whatever price and context window this page showed before are no longer current, so they are not shown.
If a call to this id started failing with a model-not-found error or an HTTP 404, this removal is the reason - not your API key and not your request.
Everything that is going away - announced shutdowns and the rest of the silent removals. Other Anthropic models that are still listed.
What to use instead - the nearest replacement from the same vendor still listed with at least as much context:
anthropic/claude-opus-5 · $25.00 (was $50.00) / 1M out
Every change we have observed since tracking began.
| Detected | Change | Detail |
|---|---|---|
| 2026-09-01 19:14 | Model Removed | Anthropic: Claude Opus 4.8 (Fast) |
Something in your code referenced a model that no longer exists. The same check runs over a whole repository:
curl -sO https://neosignal-ai.vercel.app/check.py
python check.py .
Check this model and the rest of your stack It opens with this id already filled in. Nothing is stored - the list lives in the link.