This addressing variant is no longer listed in the catalogue, so a call to this exact id will not resolve.
The model itself did not go anywhere. Drop the suffix and the same model answers.
Call this id instead: anthropic/claude-opus-4.1
We are not counting this as a removal. Every base model in that group stayed listed, so it is a change in how the catalogue addresses them rather than a retirement.
| Input | $15.00 |
| Output | $75.00 |
| Cache read | $1.50 |
| Cache write | $18.75 |
Other calls in the same code may use the same suffix:
curl -sO https://neosignal-ai.vercel.app/check.py
python check.py .
It names every model your repository calls that is already gone, and exits non-zero so the next one fails the build instead of production.