NVIDIA: nemotron-3-ultra-550b-a55b:free
nemotron-3-ultra-550b-a55b:free
131.1K context16.4K outToolsCacheStructured
Released Jun 4, 2026Updated Jun 4, 2026
Largest Nemotron 3 model for maximum open-weight reasoning and agent accuracy
Tokenizer Othernvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B-BF16
Pricing
Input price
$0.00/ 1M tokens
Output price
$0.00/ 1M tokens
Context window 131.1K tokensCompatible endpoints openaiVendor NVIDIA
Performance
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Usage & Ranking
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Supported parameters
All providers = every upstream serving this model supports it. Some providers = depends on which upstream handles the request. Default = the value sent when you leave the parameter unset.
| Parameter | Providers | Default |
|---|---|---|
| frequency_penalty | All providers | Not sent by default |
| include_reasoning | All providers | - |
| logit_bias | All providers | - |
| max_tokens | All providers | - |
| min_p | Some providers | - |
| presence_penalty | All providers | Not sent by default |
| reasoning | All providers | - |
| repetition_penalty | All providers | Not sent by default |
| response_format | All providers | - |
| seed | Some providers | - |
| stop | All providers | - |
| structured_outputs | All providers | - |
| temperature | All providers | 1 |
| tool_choice | All providers | - |
| tools | All providers | - |
| top_k | All providers | Not sent by default |
| top_p | All providers | 0.95 |