# Free Nemotron API Endpoints & Rate Limits

> 4 providers · 11 free models · Last updated: 01 Nov 2026

## Quick Answer

11 free Nemotron API models across 4 providers including OpenCode Zen, OpenRouter, and Kilo Gateway. Verified rate limits, context windows, and OpenAI-compatible endpoints. Last updated: 01 Nov 2026.

Free Nemotron API models—including Nemotron 3 Ultra 550B, 3.5 Lightning, and Super-VL—are available on OpenRouter (1M context), OpenCode Zen, and Requesty.

## Quick Connect

NVIDIA Nemotron 3.5 Lightning with 1M context window.

- **Base URL:** `https://openrouter.ai/api/v1`
- **Model:** `nvidia/nemotron-3.5-lightning:free`
- **Provider:** [OpenRouter](/providers/openrouter/)

```python
from openai import OpenAI

client = OpenAI(
    base_url="https://openrouter.ai/api/v1",
    api_key="your-api-key",  # from OpenRouter
)

response = client.chat.completions.create(
    model="nvidia/nemotron-3.5-lightning:free",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)
```

## Rate Limits & Model Inventory

| Model | Provider | Cost | Context | RPM | TPM | RPD | Day tokens | Verified |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Nemotron 3 Ultra Free | [OpenCode Zen](/providers/opencode-zen/) | $0 (promo) | 256K - 1M | Not published | Not published | Not published | Not published | 2026-11-01 |
| Nemotron 3.5 Lightning Free | [OpenCode Zen](/providers/opencode-zen/) | $0 (promo) | 256K - 1M | Not published | Not published | Not published | Not published | 2026-11-01 |
| Nemotron 3.5 Super VL Free | [OpenCode Zen](/providers/opencode-zen/) | $0 (promo) | 256K - 1M | Not published | Not published | Not published | Not published | 2026-11-01 |
| nvidia/nemotron-3-nano-omni-30b-a3b-reasoning:free | [OpenRouter](/providers/openrouter/) | $0 | 250K | 20 | Provider-dependent | 50 (below $10 credits) / 1,000 ($10+ credits) | Not published | 2026-11-01 |
| nvidia/nemotron-3-ultra-550b-a55b:free | [OpenRouter](/providers/openrouter/) | $0 | 1000000 | 20 | Provider-dependent | 50 (below $10 credits) / 1,000 ($10+ credits) | Not published | 2026-11-01 |
| nvidia/nemotron-3.5-content-safety:free | [OpenRouter](/providers/openrouter/) | $0 | 125K | 20 | Provider-dependent | 50 (below $10 credits) / 1,000 ($10+ credits) | Not published | 2026-11-01 |
| nvidia/nemotron-3.5-lightning:free | [OpenRouter](/providers/openrouter/) | $0 | 1000000 | 20 | Provider-dependent | 50 (below $10 credits) / 1,000 ($10+ credits) | Not published | 2026-11-01 |
| nvidia/nemotron-3.5-super-vl:free | [OpenRouter](/providers/openrouter/) | $0 | 1000000 | 20 | Provider-dependent | 50 (below $10 credits) / 1,000 ($10+ credits) | Not published | 2026-11-01 |
| nvidia/nemotron-3.5-lightning:free | [Kilo Gateway](/providers/kilo-gateway/) | $0 | 1000000 | 20 | Provider-dependent | 200/day | Not published | 2026-11-01 |
| nvidia/nemotron-3.5-super-vl:free | [Kilo Gateway](/providers/kilo-gateway/) | $0 | 1000000 | 20 | Provider-dependent | 200/day | Not published | 2026-11-01 |
| nvidia/nemotron-3-super-120b-a12b | [Requesty](/providers/requesty/) | $0 | 128K | Not published | Not published | 200/day shared | Not published | 2026-11-01 |

Web page: https://freeinference.dev/free-nemotron-api/
Machine-readable JSON: /data/providers.json
Agent summary: /llms.txt

Numbers cross-checked against official docs and live probes as of 2026-11-01. Limits change without notice — this is a map, not a contract.