NVIDIA Nemotron 3 Ultra 550B A55B BF16 vs GPT-5 Nano
Benchmark Performance
Available Benchmarks
Technical Differences
Side-by-Side Facts
| Field | NVIDIA-Nemotron-3-Ultra-550B-A55B-BF16 | GPT-5 Nano |
|---|---|---|
| Developer | NVIDIA | OpenAI |
| Family | Nvidia Nemotron 3 Ultra 550b A55b Bf16 | Gpt 5 |
| Model | NVIDIA-Nemotron-3-Ultra-550B-A55B-BF16 | GPT-5 Nano |
| Version | NVIDIA-Nemotron-3-Ultra-550B-A55B-BF16 | GPT-5 Nano |
| Lifecycle | active | active |
| Released | 2026-06-04 | 2025-08-07 |
| Knowledge cutoff | Unknown | 2024-05-31 |
| Input modalities | Text | Text, Image |
| Output modalities | Text | Text |
| Context window | 262K | 400K |
| 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 |
14 comparable fields · 11 material differences · Pair passes the primary-source comparison gate
NVIDIA Nemotron 3 Ultra 550B A55B BF16 Capabilities
GPT-5 Nano Capabilities
Internal Comparison Graph
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Primary Evidence
Sources and Freshness
Questions
NVIDIA Nemotron 3 Ultra 550B A55B BF16 vs GPT-5 Nano FAQs
Is NVIDIA Nemotron 3 Ultra 550B A55B BF16 or GPT-5 Nano 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 Nano, 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 Nano?+
NVIDIA Nemotron 3 Ultra 550B A55B BF16 is $0.50 and GPT-5 Nano is $0.025 per million tokens, so GPT-5 Nano is cheaper on this metric. NVIDIA Nemotron 3 Ultra 550B A55B BF16 is $2.20 and GPT-5 Nano is $0.20 per million tokens, so GPT-5 Nano is cheaper on this metric.
Which has a larger context window, NVIDIA Nemotron 3 Ultra 550B A55B BF16 or GPT-5 Nano?+
GPT-5 Nano has the larger sourced context window. NVIDIA Nemotron 3 Ultra 550B A55B BF16 supports 262K and GPT-5 Nano supports 400K.
Which performs better in benchmarks, NVIDIA Nemotron 3 Ultra 550B A55B BF16 or GPT-5 Nano?+
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 Nano 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 Nano is not marked open weight.
Can NVIDIA Nemotron 3 Ultra 550B A55B BF16 and GPT-5 Nano understand images?+
NVIDIA Nemotron 3 Ultra 550B A55B BF16 is not documented with image input; GPT-5 Nano 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 Nano?+
Neither has a larger sourced maximum output. NVIDIA Nemotron 3 Ultra 550B A55B BF16 is — and GPT-5 Nano is 128K.
Do NVIDIA Nemotron 3 Ultra 550B A55B BF16 and GPT-5 Nano support reasoning and tool use?+
NVIDIA Nemotron 3 Ultra 550B A55B BF16: reasoning and tool calling. GPT-5 Nano: 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 Nano?+
NVIDIA Nemotron 3 Ultra 550B A55B BF16 has 3 sourced provider routes; GPT-5 Nano 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 Nano?+
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.