NVIDIA Nemotron 3 Ultra 550B A55B
Released 4 Jun 20261M context550B A55BopenAlso written as Nemotron 3 Ultra 256K, NVIDIA-Nemotron-3-Ultra-550B-A55B-BF16
1 result on 1 of 13 boards, latest measured Jul 2026. Compare with other models
Results
Each line sits on its own board's scale. Tall tick: the board leader.
EHR and workflow agents
- CHI-BenchListed as openai-agents + Nemotron 3 Ultra 256KAll Domains pass@1; openai-agents; Tinker 256K0.0Rank 43 of 43 here, 45 models on the boardLeader erius + claude-opus-5 54.7
Sources
The quote, page and document for each of the 1 result
43CHI-Bench All Domains pass@1 0.0
Printed as 0.0%Official leaderboard, measured Jul 2026Configuration: All Domains pass@1; openai-agents; Tinker 256KCHI-Bench leaderboard (actAVA) official leaderboard, actAVA, 12 Aug 2026. CHI-Bench v1.0.0, All Domains, rank 44, Agent/Model and Accuracy columns; PA/UM/CM follow; board last updated 2026-08-12; board Date column 2026-07-24; accessed 2026-09-30. Linked submission provenance: run 2026-07-22T22:31:29.302007Z to 2026-07-22T23:37:41.111758Z; submitted_at 2026-08-12T20:20:00Z.44 | openai-agents | Nemotron 3 Ultra 256K | Open-source | 0.0% | 0.0% | 0.0% | 0.0% | 2026-07-24
Every result from this document- Also printed in CHI-Bench submission manifest: openai-agents + nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B-BF16:peft:262144, submission.model; provenance.started_at / finished_at; results.overall.pass_at_1; retrieved 2026-09-30
Other NVIDIA models: Nemotron 3.5 Lightning, Nemotron 3 Ultra