Free LLM API.
No key. No wallet.
6 open-source models, hosted free on NVIDIA, routed through BlockRun. No key. No wallet. Six ways to call any of them.
curl https://blockrun.ai/api/v1/chat/completions \
-H "Content-Type: application/json" \
-d '{
"model": "nvidia/nemotron-3.5-lightning",
"messages": [{"role": "user", "content": "Hello"}]
}'5 dedicated pages.
One free endpoint.
Free Llama API.
Meta's Llama 3.2 11B Vision — 128K context, takes images as well as text. No key, no wallet, no subscription. Just call it.
Free Reasoning API.
Nemotron 3.5 Lightning (131K context, thinking mode) and Nemotron 3 Ultra 550B — 550B total / 55B active, the largest free model in the catalog. No key, no signup.
Free Mistral API.
Our free Mistral upstream is down — calls to nvidia/mistral-* still return 200, answered by a healthy free model. Meanwhile, two free open-weights coding models with no key and the same OpenAI-compatible endpoint.
Free Nemotron API. With vision.
Nemotron 3 Nano Omni — 31B / 3.2B active MoE, 256K context. The only free model that takes images, video, and audio. ChartQA 90.3, DocVQA 95.6, MMMU 70.8.
Free GPT-OSS API.
OpenAI's GPT-OSS — the only open-weights models OpenAI ever released. The 20B variant, 128K context, hosted free on NVIDIA and called through BlockRun. (NVIDIA retired its free 120B hosting on 2026-09-03; calls to it now redirect.)
We don't share
your data.
Your prompt goes to the AI provider you picked. Nothing else, nowhere else. No training, no retention beyond the request, no profile linking.
- No training, no retention beyond the request. Your prompt is forwarded only to the AI provider you select.
- Wallet in, prompt out. Pseudonymous by default — no email, no phone number, no identity documents.
- Read the code, audit the wire format, run it yourself. @blockrun/llm and blockrun-llm on npm and PyPI.
Frontier models are
pay-per-call. Same endpoint.
Claude Opus, GPT-5.6, Gemini, Grok, Kimi — 72 paid models on the same API. No subscription. No monthly minimum. Top up $5 in USDC and call anything.