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Nemotron 3 Ultra (free)
nvidia·nvidia/nemotron-3-ultra-550b-a55b-free·GA·Open weights·nemotron series·NEW
Largest Nemotron 3 model for maximum open-weight reasoning and agent accuracy
At a glance
Reference price$0 / $0 per 1M
Cache read — · OpenRouter
Lowest paidNo paid channels
2 more $0 channels
Context1,000,000
Output limit65,536
Capabilities
✓ Reasoning✓ Tool useStructured output✓ TemperatureAttachments
Modalities
Text
Knowledge cutoff2026-02
Released / updated2026-06-04 / 2026-06-04
Quality & performance
Artificial Analysis doesn't cover this model (267 of 2059 have data). Quality data comes from independent evals covering widely used models.
Available at 2 providers0 with public prices · 2 free
| Provider | Tier | Input | Output | Cache read | Cache write | Context | Output limit | Status |
|---|---|---|---|---|---|---|---|---|
| OpenRouter nvidia/nemotron-3-ultra-550b-a55b:free | Gateway | Free | — | — | 1,000,000 | 65,536 | ||
| OpenCode Zen nemotron-3-ultra-free | Gateway | Free | $0 | — | 1,000,000 | 128,000 |
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.
Your usage cost
This model is $0 across all listed channels (OpenRouter, OpenCode Zen).
Benchmark
No upstream benchmark data for this model. For quality, see the Artificial Analysis intelligence score above.
Reasoning control
Toggle (on / off)effort = mediumeffort = highbudget_tokens
1 / 2 providers expose no reasoning control (reasoning_options: []).
Related models
nemotron-lightning-3.5-30b-a3bsame series$0.045 / $0.18Nemotron 3.5 Lightning 30B A3Bsame series$0 / $0Nvidia Nemotron 3.5 Lightningsame series$0.05 / $0.20
Price historyone sample accumulated per data sync
Input listOutput listMin blended