nvidia/nemotron-3-ultra-550b-a55b:batch

We saw this model disappear from the catalogue on 2026-09-03, 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Whatever price and context window this page showed before are no longer current, so they are not shown.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 NVIDIA models that are still listed.

What to use instead - the nearest replacement from the same vendor still listed with at least as much context:

nvidia/nemotron-3-super-120b-a12b · $0.40 (was $3.60) / 1M out

Change history

Every change we have observed since tracking began.

DetectedChangeDetail
2026-09-03 19:14Model RemovedNVIDIA: Nemotron 3 Ultra (batch)
2026-08-19 19:14Pricing ChangeOutput $1.80 -> $3.60 (+100.0%) · Cache price (read) $0.100 -> $0.200 (+100.0%) · Input $0.300 -> $0.600 (+100.0%)
2026-08-06 19:14Model AddedNVIDIA: Nemotron 3 Ultra (batch)

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.