Largest Nemotron 3 model for maximum open-weight reasoning and agent accuracy
Nemotron 3 Ultra 550B A55B by nvidia is offered by 15 providers on this page. Public prices are shown for 12 of them. Its official list price is $0.50 per 1M input tokens and $2.50 per 1M output tokens. The lowest paid channel is routing.run at $0.10 / $0.10 per 1M, about 10× below the list price. That channel is a third-party gateway, so confirm its availability and rate limits before depending on it. It also has 3 free ($0) channels; free tiers usually carry rate limits, and subscription-covered access bills $0 per token only after the subscription fee.
Artificial Analysis rates it 22.9 on the Intelligence Index, with 49.3 for coding and 20.1 for agentic tasks. Against its lowest blended price of $0.10 per 1M, that is roughly 229 index points per dollar, which is the value ratio the leaderboards rank on. Median output speed is 180 tokens per second, with 1.2s to the first token. Running one task of the Artificial Analysis suite costs about $0.5976, which reflects how many tokens its reasoning consumes rather than the unit price alone.
The context window is 1,000,000 tokens at the reference host, but hosts report different limits, from 131,072 to 1,048,576, so the usable window depends on the provider you pick. It supports reasoning, tool use, and structured output. The weights are open, so it can also be self-hosted or served through a gateway of your choice.
Quality is independently evaluated by Artificial Analysis. Speed/latency are model-level medians.
| Provider | Tier | Input | Output | Cache read | Cache write | Context | Output limit | Status |
|---|---|---|---|---|---|---|---|---|
| UnoRouter nemotron-3-ultra-550b-a55b:free | Gateway | Free | — | — | 1,000,000 | 128,000 | ||
| Kenari | Gateway | Free | — | — | 1,000,000 | 128,000 | ||
| Requesty | Gateway | Free | — | — | 1,048,576 ⚠ | 65,536 | ||
| routing.run nemotron-3-ultra | Gateway | $0.10 | $0.10 | — | — | 131,072 ⚠ | 32,000 | |
| Kilo Gateway | Gateway | $0.50 | $2.20 | $0.10 | — | 262,144 ⚠ | 16,384 | |
| OpenRouter | Gateway | $0.50 | $2.20 | $0.10 | — | 262,144 ⚠ | 16,384 | |
| DevPass (LLM Gateway) nemotron-3-ultra-550b | Gateway | $0.50 | $2.20 | $0.10 | — | 1,048,576 ⚠ | 128,000 | |
| Eden AI | Gateway | $0.50 | $2.20 | $0.10 | — | 262,144 ⚠ | 128,000 | |
| NvidiaOfficial | Cloud | $0.50 | $2.50 | $0.15 | — | 1,000,000 | 65,536 | |
| Pioneer nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B-BF16 | Gateway | $0.50 | $2.50 | $0.15 | $0.50 | 1,000,000 | 65,000 | |
Sorted by blended price (input×0.75 + output×0.25) asc. The official channel always shows regardless of rank. Whether a gateway's low price is actually usable can't be verified.
Interleaved thinking (reasoning between tool calls) is declared by 2 of 15 providers.
3 / 15 providers expose no reasoning control (reasoning_options: []).
3 more channels offer $0 (UnoRouter, Kenari, Requesty); free tiers usually have rate limits and no SLA, excluded from ranking.
| Name | Conditions | Score | Metric | Source |
|---|---|---|---|---|
| SWE-Bench Verified | — | 70.7 | resolved | Source ↗ |
| SWE-Bench Multilingual | — | 67.7 | resolve rate | Source ↗ |
| Terminal-Bench | v2.1 | 56.4 | success rate | Source ↗ |
| GPQA | variant: no tools | 87 | accuracy | Source ↗ |
| Humanity's Last Exam | variant: no tools | 26.7 | accuracy | Source ↗ |
| Humanity's Last Exam | variant: with tools | 37.4 | accuracy | Source ↗ |
| LiveCodeBench | vv6 | 89 | pass@1 | Source ↗ |
| MMLU-Pro | — | 86.8 | accuracy | Source ↗ |
| BrowseComp | — | 44.4 | accuracy | Source ↗ |
| IFBench | variant: prompt loose | 81.7 | accuracy | Source ↗ |
| GDPval | — | 46.7 | wins or ties | Source ↗ |
The same benchmark scores very differently across harness / dataset, so the qualifying conditions must be shown together.
Individual evaluations run by Artificial Analysis, on the same reasoning tier as the intelligence score above. Each benchmark has its own task set and harness, so rows are not comparable with one another. The Intelligence Index above draws on a different, newer set of evaluations.