Nemotron 3 Ultra 550B A55B is free on 4 providers today. Permanent free tiers come first, then one-time trials.
| Provider | API model ID | Context | Free limits | Sign-up |
|---|---|---|---|---|
| Kilo AI Gateway | nvidia/nemotron-3-ultra-550b-a55b:free |
1M | 200 requests/hour per IP on free models (anonymous use allowed) | No card |
| NVIDIA NIM | nvidia/nemotron-3-ultra-550b-a55b |
1M | ~40 RPM (varies per model, not published) | Phone |
| AIHubMix (free models) | nemotron-3-ultra-550b-a55b-free |
1M | 5 RPM per account on most *-free routes | Free account |
| LLMTR | nvidia/nemotron-3-ultra-550b-a55b |
1M | Not published; lower allowance in an account's first 24h | Free account |
Free lists change often. Each provider page shows its full limits and code examples, and every change is logged in the changelog. Want to call it from Claude Code or Cursor? Use the setup generator.