Free LLM API (OpenAI-Compatible)
These models bill $0 per token on OpenPaths, so a new account with an empty balance can call them right away. Paid models on the same key unlock when you add credits. Free routes are best-effort and rate limited per key.
Free LLM API models and pricing
| Model | Provider | Context | Price |
|---|---|---|---|
Crouton Alpha or/crouton-alpha | OpenRouter | 1024K | Free |
NVIDIA: Nemotron 3 Ultra (free) or/nemotron-3-ultra-550b-a55b:free | OpenRouter | 1M | Free |
Thinking Machines: Inkling (free) or/inkling:free | OpenRouter | 1024K | Free |
NVIDIA: Nemotron 3.5 Super VL (free) or/nemotron-3.5-super-vl:free | OpenRouter | 1M | Free |
Dots Studio: Dots3-Note Preview (free) or/dots-3-note-preview:free | OpenRouter | 500K | Free |
Cohere: North Mini Code (free) or/north-mini-code:free | OpenRouter | 250K | Free |
Google: Gemma 4 31B (free) or/gemma-4-31b-it:free | OpenRouter | 256K | Free |
XingChen: Xing4.0 29B A4B (free) or/xing4.0-29b-a4b:free | OpenRouter | 256K | Free |
Thinking Machines: Inkling Small (free) or/inkling-small:free | OpenRouter | 1024K | Free |
NVIDIA: Nemotron 3.5 Lightning (free) or/nemotron-3.5-lightning:free | OpenRouter | 1M | Free |
Google: Gemma 4 26B A4B (free) or/gemma-4-26b-a4b-it:free | OpenRouter | 256K | Free |
Recursive: Flint (free) or/flint-v1.0:free | OpenRouter | 256K | Free |
NVIDIA: Nemotron 3 Nano Omni (free) or/nemotron-3-nano-omni-30b-a3b-reasoning:free | OpenRouter | 250K | Free |
Free Models Router or/openrouter-free | OpenRouter | 195K | Free |
DeepSeek V4 Flash (NVIDIA, free) nvidia/deepseek-v4-flash | NVIDIA | 1M | Free |
MissingNo missingno | Nous Research | 256K | Free |
Meituan: LongCat 2.5 Preview nous/meituan/longcat-2.5-preview:free | Nous Research | 1024K | Free |
StepFun: Step 5 Preview nous/stepfun/step-5-preview:free | Nous Research | 977K | Free |
Upstage: Solar Mini 4 nous/upstage/solar-mini4:free | Nous Research | 512K | Free |
Poolside: Laguna S 2.1 nous/poolside/laguna-s-2.1:free | Nous Research | 256K | Free |
Poolside: Laguna XS 2.1 nous/poolside/laguna-xs-2.1:free | Nous Research | 256K | Free |
inclusionAI: Ling 3.0 Flash Sante nous/inclusionai/ling-3.0-flash-sante:free | Nous Research | 256K | Free |
OpenPaths Free openpaths/free | OpenPaths | 1024K | Free |
Space Bunny Alpha or/space-bunny-alpha | OpenRouter | 1M | Free |
Nemotron Nano 30B or/nemotron-nano | OpenRouter | 256K | Free |
GLM-4.6v Flash glm-4.6v-flash | Z.AI | 128K | Free |
FAQ
Are these models really free?
They bill $0 per input and output token. Free routes are served by upstream providers and may be rate limited or change; the list below reflects the current OpenPaths catalog.
Do I need a credit card?
No. Create an account, copy your key, and call a free model. A balance is only needed for paid models.
Is it compatible with the OpenAI SDK?
Yes. Set base_url to https://openpaths.io/v1 and use your OpenPaths API key; request and response shapes follow the OpenAI API.