NVIDIA Nemotron 3 Ultra 550B A55B BF16 vs GPT-5.5
At a Glance
| Compare |  GPT-5.5OpenAI | |
|---|---|---|
| Intelligence, Cost, and Efficiency | ||
| IntelligenceHigher is better · MM Intelligence v2.5 | UnrankedNot in the 46-model eligible cohort | #7 of 4683.9 score · 3/3 sources · complete |
| CostLower is better · Published-token output estimate | #19 of 44$0.092 per LiveBench case | #38 of 44$0.341 per LiveBench case |
| EfficiencyHigher is better · MM Efficiency v1.5 | UnrankedNot in the 38-model eligible cohort | #18 of 3853.4 score · 3/3 sources · complete |
| Pricing and Limits | ||
| Input priceFrom · USD / 1M tokens | $0.50Openrouter ↗ · Aug 29, 2026 | $5.00Openai ↗ · Sep 3, 2026 |
| Output priceFrom · USD / 1M tokens | $2.20Openrouter ↗ · Aug 29, 2026 | $30.00Openai ↗ · Sep 3, 2026 |
| Context windowMaximum documented tokens | 262K | 1,050K |
| Model facts checked | Aug 28, 2026View model evidence → | Sep 3, 2026View model evidence → |
Token prices are the lowest available sourced USD rates; input and output may use different providers. Cost ranking estimates output spend on LiveBench, not a full request bill. Ranking methodology →
Available Benchmarks
| Benchmark | NVIDIA-Nemotron-3-Ultra-550B-A55B-BF16 | GPT-5.5 |
|---|---|---|
| LiveBench2026-06-25 · overall · leader | 73.4987% of row best · percent · nemotron-3-ultra-550b-a55b · 41,654 output tokens / case | 84.54100% of row best · percent · gpt-5.5-xhigh · 11,355 output tokens / case |
| ToneBench2026-09-11-10-task-4ef099199c9c · overall_score · unverified | 76.3392% of row best · points · Nemotron 3 Ultra 550B (reasoning) · 2,940 output tokens / case | 82.60100% of row best · points · GPT-5.5 (xhigh) · 4,050 output tokens / case |
| Overall ResultCounted from the protocol-matched rows above | 0 benchmark winsNo overall winner | 1 benchmark winNo overall winner |
Third-party benchmark Only like-for-like primary-publisher results are shown; raw scores, relative scores, configuration, and token spend remain visible.
Side-by-Side Facts
| Field | NVIDIA-Nemotron-3-Ultra-550B-A55B-BF16 | GPT-5.5 |
|---|---|---|
| Developer | NVIDIA | OpenAI |
| Family | Nvidia Nemotron 3 Ultra 550b A55b Bf16 | Gpt 5 5 |
| Model | NVIDIA-Nemotron-3-Ultra-550B-A55B-BF16 | GPT-5.5 |
| Version | NVIDIA-Nemotron-3-Ultra-550B-A55B-BF16 | GPT-5.5 |
| Lifecycle | active | active |
| Released | 2026-06-04 | 2026-04-23 |
| Knowledge cutoff | Unknown | 2025-12-01 |
| Input modalities | Text | Text, Image |
| Output modalities | Text | Text |
| Context window | 262K | 1,050K |
| Total parameters | 560.5B | Unknown |
| Active parameters | 55B | Unknown |
| License | other | Unknown |
| Open weights | Yes | No |
| API available | Yes | Yes |
| Self-hostable | Yes | No |
| Provider access | Fireworks Ai (Standard), Hugging Face (Standard), Openrouter (Standard) | Openai (Standard), Openrouter (Standard) |
| Capabilities | chat, generation, reasoning, tools | chat, generation, reasoning, structured_outputs, tools |
NVIDIA Nemotron 3 Ultra 550B A55B BF16 Capabilities
GPT-5.5 Capabilities
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Primary Evidence
Sources and Freshness
Questions
NVIDIA Nemotron 3 Ultra 550B A55B BF16 vs GPT-5.5 FAQs
Is NVIDIA Nemotron 3 Ultra 550B A55B BF16 or GPT-5.5 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both NVIDIA Nemotron 3 Ultra 550B A55B BF16 and GPT-5.5, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, NVIDIA Nemotron 3 Ultra 550B A55B BF16 or GPT-5.5?+
NVIDIA Nemotron 3 Ultra 550B A55B BF16 is $0.50 and GPT-5.5 is $5.00 per million tokens, so NVIDIA Nemotron 3 Ultra 550B A55B BF16 is cheaper on this metric. NVIDIA Nemotron 3 Ultra 550B A55B BF16 is $2.20 and GPT-5.5 is $30.00 per million tokens, so NVIDIA Nemotron 3 Ultra 550B A55B BF16 is cheaper on this metric.
Which has a larger context window, NVIDIA Nemotron 3 Ultra 550B A55B BF16 or GPT-5.5?+
GPT-5.5 has the larger sourced context window. NVIDIA Nemotron 3 Ultra 550B A55B BF16 supports 262K and GPT-5.5 supports 1,050K.
Which performs better in benchmarks, NVIDIA Nemotron 3 Ultra 550B A55B BF16 or GPT-5.5?+
There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.
Can NVIDIA Nemotron 3 Ultra 550B A55B BF16 or GPT-5.5 be self-hosted?+
NVIDIA Nemotron 3 Ultra 550B A55B BF16 is the only model in this pair currently marked as self-hostable. NVIDIA Nemotron 3 Ultra 550B A55B BF16 is open weight; GPT-5.5 is not marked open weight.
Can NVIDIA Nemotron 3 Ultra 550B A55B BF16 and GPT-5.5 understand images?+
NVIDIA Nemotron 3 Ultra 550B A55B BF16 is not documented with image input; GPT-5.5 is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, NVIDIA Nemotron 3 Ultra 550B A55B BF16 or GPT-5.5?+
Neither has a larger sourced maximum output. NVIDIA Nemotron 3 Ultra 550B A55B BF16 is — and GPT-5.5 is 128K.
Do NVIDIA Nemotron 3 Ultra 550B A55B BF16 and GPT-5.5 support reasoning and tool use?+
NVIDIA Nemotron 3 Ultra 550B A55B BF16: reasoning and tool calling. GPT-5.5: reasoning, tool calling, and image input. Feature support does not establish relative quality.
Which is available from more inference providers, NVIDIA Nemotron 3 Ultra 550B A55B BF16 or GPT-5.5?+
NVIDIA Nemotron 3 Ultra 550B A55B BF16 has 3 sourced provider routes; GPT-5.5 has 2, so NVIDIA Nemotron 3 Ultra 550B A55B BF16 has broader tracked availability.
Which offers better value, NVIDIA Nemotron 3 Ultra 550B A55B BF16 or GPT-5.5?+
There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.