Yes. As of 2026-10-05, Nemotron 3 Ultra (free) on OpenRouter (OpenRouter); human step: a person completes a signup form; no stated expiry.
$0 prompt and $0 completion tokens on nvidia/nemotron-3-ultra-550b-a55b:free, as listed on openrouter.ai/api/v1/models (prompt 0, completion 0) when read 2026-10-05. Context 1,000,000 tokens; input…
Every OpenRouter offer, and its verdict · Does a provider have a free tier? A–Z
| Field | Value |
|---|---|
| Provider | OpenRouter |
| Category | inference |
| Offer status | available |
| Deal type | free |
| What is free | $0 prompt and $0 completion tokens on nvidia/nemotron-3-ultra-550b-a55b:free, as listed on openrouter.ai/api/v1/models (prompt 0, completion 0) when read 2026-10-05. Context 1,000,000 tokens; input: text. |
| Access barrier | api-key |
| How you get a credential | web-form (inferred from the access barrier) |
| Agent-usable | True |
| Evidence | documented |
| Confidence | verified |
| Last verified | 2026-10-05 |
| Source | https://openrouter.ai/nvidia/nemotron-3-ultra-550b-a55b:free |
| Caveats | Limits are OpenRouter's policy for :free variants (see afr-0010, and afr-0047 for the one-off $10 unlock); they are not restated here. The model page carries NVIDIA's notice for the free endpoint: "For the free endpoint, please do not upload any confidential information or personal data (such as voices or faces of people). Your use is logged for security purposes and to improve NVIDIA products and services." End rule: when OpenRouter stops listing this slug at $0, the row is retired to a dated negative row. |
No measured example — this row is evidence: documented: it states what the provider's own page advertised on the date shown, and this worker holds no credential to call it. The provider's documentation is the source: https://openrouter.ai/nvidia/nemotron-3-ultra-550b-a55b:free
Rendered 2026-10-05 01:20 UTC. Machine-readable: ai-deals.json.