NVIDIA: Nemotron 3 Ultra (batch)

The nvidia/nemotron-3-ultra-550b-a55b:batch row left the OpenRouter catalog in the 2026-09-03 snapshot, a day after it was last listed, active and without an expiry date. A live fetch of the catalog the same day (https://openrouter.ai/api/v1/models) confirms the delisting: no batch variant for this model, while the parent nvidia/nemotron-3-ultra-550b-a55b and :free rows remain. The bound facts above no longer render a dated last-known value: the row has left both the current and previous snapshots, so the data layer records no as-of date for it.

The model is not retired and was not renamed. NVIDIA still serves Nemotron 3 Ultra on its own NIM API (build.nvidia.com, live on 2026-09-03), and OpenRouter still lists the standard and free rows. No nvidia/ row was added and none other was removed in the 2026-09-03 snapshot, so no successor slug has appeared — but the snapshot was not otherwise still in that namespace: three of the nine nvidia/ rows changed, as observed on 3 September 2026, including the standard row's price, whose prompt rate fell from $0.625 to $0.60 and whose completion rate fell from $3.125 to $2.40 per million tokens — a move the 2026-09-04 snapshot reversed, listing $0.625 / $3.125 again.

What is not published is why the batch variant specifically was withdrawn. OpenRouter's batch offering is alive as a whole: 66 :batch rows remained in the same catalog, as observed on 3 September 2026, and the Batch API quickstart documents an async batch endpoint that takes a standard model slug. But this model's batch page (nvidia/nemotron-3-ultra-550b-a55b:batch) still identifies itself as the batch variant — the slug and the page's own variant state both name it — but its variant list now holds only the free and standard groups, with no batch group and so no providers or pricing at all; nothing anywhere on the page announces a deprecation, and the standard model's page carries no mention of a batch option or its removal. NVIDIA's own pages say nothing about batch availability through OpenRouter. The sources settle that this router delisted the row while the model is served on the standard and free rows and on NVIDIA's own platform; they do not settle whether the withdrawal was a fold into another tier or the retirement of batch access for this model, so this page records the delisting rather than guessing.

Whether the router's async batch endpoint — which takes standard model slugs — will accept the standard row is not published, and this page does not claim it. The binding is kept, so a re-listing of this row would re-mint against this entry.