by Moonshot AI

MoonshotAI: Kimi K3.1 Pro.

multimodal closed 1M ctx
Cheapest input
$2.0/M
on OpenRouter
Cheapest output
$10.0/M
on OpenRouter
Hosted equiv.
~$3.6/hr
@ 100 tok/s on OpenRouter

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. It is built for long-horizon coding, 3D...

Hosted API only

No self-host path — closed weights.

MoonshotAI: Kimi K3.1 Pro's weights aren't published. Use it via the access providers below.

Where to use it

Cheapest hosted endpoints.

Provider Access $/M in $/M out
OpenRouter api aggregator $2.0 $10.0 Launch ↗
Family

Variants in the Kimi family.

FAQ

Frequently asked.

How do I run MoonshotAI: Kimi K3.1 Pro?
MoonshotAI: Kimi K3.1 Pro is a closed-source API model. The cheapest way to access it is through the API providers listed on this page (direct API, aggregators, and hosted chat UIs).
Where can I access MoonshotAI: Kimi K3.1 Pro?
MoonshotAI: Kimi K3.1 Pro is available via OpenRouter. Each access option lists its own pricing (per million tokens or hourly hosting).
How much does it cost to run MoonshotAI: Kimi K3.1 Pro?
API pricing starts at $2.0/M input tokens and $10.0/M output tokens. Self-hosting cost depends on the GPU you rent — see the Run It Yourself tab.
Is MoonshotAI: Kimi K3.1 Pro open-source or proprietary?
MoonshotAI: Kimi K3.1 Pro is a proprietary model from Moonshot AI. Access is API-only — there are no public weights to download.