Free
Kimi K3.1 Pro is free to call on NVIDIA, 1M-token context flagship
Moonshot's new flagship, Kimi K3.1 Pro, now has a free endpoint on NVIDIA. Sign up for an NVIDIA account, generate an API key and call it on build.nvidia.com for free, with a ~1M-token context and about 40 requests per minute.
Free access to Kimi K3.1 Pro at about 40 RPM, no per-token billing
- Eligibility：
- Create and verify an NVIDIA account and join the free NVIDIA Developer Program. Free endpoints are for prototyping, research and testing; production use serving real users requires an NVIDIA AI Enterprise license.
- Benefit duration：
- Available while you are a Developer Program member; rate limits are set per model and account
The briefing
Moonshot's new flagship model, Kimi K3.1 Pro, is now in NVIDIA's API catalog marked as a Free Endpoint. Sign up, generate an API key and start calling it. No card required and no per-token billing. On OpenRouter, Vercel AI Gateway and Kilo the same model costs about $2 input and $10 output per million tokens.
What you can use
Kimi K3.1 Pro is a 3T-class multimodal model from Moonshot AI built for reasoning, coding and agentic workflows. It takes text, image and video input, outputs text, and has a context window of about 1.05M tokens.
The free endpoint is rate limited to about 40 requests per minute; your own limit is shown in the dashboard. Free endpoints are for prototyping, research and testing. Production use serving real users needs an NVIDIA AI Enterprise license.
How to use it
- Open the Kimi K3.1 Pro model page, sign in with your NVIDIA account and try it in the Playground.
- Click Generate API Key, then call the OpenAI-compatible endpoint
https://integrate.api.nvidia.com/v1/chat/completionswith the model namemoonshotai/kimi-k3_1-pro.
For more free models, see our NVIDIA API Catalog free models roundup. Full terms are in the NVIDIA NIM FAQ.