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

Served by Baseten (fp4)
retired

baseten serves 5 models.

Tracking status

LTno logprobs — This endpoint does not return logprobs, so logprob tracking is impossible.
B3ITretired · no bis — Monitoring was retired: we could not find enough border inputs for this endpoint. (since 2026-07-31)

Endpoint details

from the OpenRouter catalog snapshot
Pricing (per Mtok)
$0.60 in · $2.40 out
Listed since
2026-06-04
Claims temperature
yes
Claims logprobs
no

Spend

what OpenRouter billed for tracking this endpoint. Spend recorded since 2026-07-18
Total to date
$0.20
Last 30 days
$0.00048
Queries
15,075
  • B3IT (onboarding)$0.20100%
  • Vetting$0.00099<1%
Vetting is the one-off probe that checks the endpoint's billed cost against its advertised price. B3IT (onboarding) is the initial border-input search; B3IT (monitoring) and LT are the recurring daily checks.

Timothée Chauvin, Erwan Le Merrer, François Taïani, Gilles Tredan (2026), "Log Probability Tracking of LLM APIs". ICLR 2026. https://arxiv.org/abs/2512.03816

Timothée Chauvin, Clément Lalanne, Erwan Le Merrer, Jean-Michel Loubes, François Taïani, Gilles Tredan (2026), "Token-Efficient Change Detection in LLM APIs". ICML 2026. https://arxiv.org/abs/2602.11083

@inproceedings{
chauvin2026log,
title={Log Probability Tracking of {LLM} {API}s},
author={Timothee Chauvin and Erwan Le Merrer and Francois Taiani and Gilles Tredan},
booktitle={The Fourteenth International Conference on Learning Representations},
year={2026},
url={https://openreview.net/forum?id=hFxivbAgVP}
}

@inproceedings{
chauvin2026tokenefficient,
title={Token-Efficient Change Detection in {LLM} {API}s},
author={Timothee Chauvin and Cl{\'e}ment Lalanne and Erwan Le Merrer and Jean-Michel Loubes and Francois Taiani and Gilles Tredan},
booktitle={Forty-third International Conference on Machine Learning},
year={2026},
url={https://openreview.net/forum?id=7cMlZZYZT0}
}