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Kimi K3.1 ProOPEN
Kimi K3.1 Pro is Moonshot AI's flagship open-weight multimodal reasoning model and a post-trained successor to Kimi K3, with a 1M-token context window.
Prices update automatically — checked daily against provider list prices.
- $4 per 1M tokens, assuming 3 input for 1 output the convention used by Artificial Analysis
- cheaper than 1% of the 203 open-weight models tracked here
- 8 of 9 Moonshot AI models tracked here, from cheapest
Benchmarks & performance
Independent benchmark scores for Kimi K3.1 Pro, measured by Artificial Analysis. Higher is better.
Models at this level cost $8 per 1M tokens (median of 11) — this one costs $4.
Cheaper and better on this index: Claude Sonnet 5.5 (batch)
About this model
Kimi K3.1 Pro is an open-weight AI model by Moonshot AI. You can download and self-host it for free; the prices below are hosted-API list prices, tracked daily, for when you prefer convenience over self-hosting.
Frequently asked questions
What is Kimi K3.1 Pro?
Kimi K3.1 Pro is an AI language model from Moonshot AI. It is open-weight: you can download it and run it on your own hardware, for free. It scores 55.1 on the Artificial Analysis intelligence index.
Is Kimi K3.1 Pro free?
The weights are free and open — you can self-host Kimi K3.1 Pro and pay nothing per token. If you prefer a hosted API, list prices are $2 per million input tokens and $10 per million output tokens.
What is Kimi K3.1 Pro good at?
Independent benchmarks from Artificial Analysis give it Humanity's Last Exam 52.5%, Long Context Reasoning 86.3%, SciCode 60.8%.
How fast is Kimi K3.1 Pro?
It generates about 73.5 tokens per second, with a median 1.85s delay before the first token. Measured independently by Artificial Analysis.
Can I self-host Kimi K3.1 Pro?
Yes. Kimi K3.1 Pro has open weights, so you can download it and run it on your own GPU or server with tools like Ollama, vLLM or llama.cpp — with no per-token cost.