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MoonshotAI: Kimi K3.1 Pro API Pricing

MoonshotAI: Kimi K3.1 Pro is an API model from moonshotai. It costs $2 per 1M input tokens and $10 per 1M output tokens, with cached input at $0.2. Its context window is 1,048,576 tokens with up to 943,718 output tokens. A workload of 10M input + 2M output tokens costs about $40 per month.
Input
$2
per 1M tokens
Output
$10
per 1M tokens
Cached input
$0.2
per 1M tokens
Context window
1.04858M
1,048,576 tokens
Blended (80/20)
$3.6
per 1M tokens

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...

How much does MoonshotAI: Kimi K3.1 Pro cost for a real workload?

At 10M input + 2M output tokens per month, MoonshotAI: Kimi K3.1 Pro costs about $40 ($20 input + $20 output). Try your own volumes in the cost calculator.

What are cheaper alternatives to MoonshotAI: Kimi K3.1 Pro?

Where to run MoonshotAI: Kimi K3.1 Pro

AI/ML API: one API key for 400+ models, including most models tracked here · Novita AI: pay-as-you-go APIs for open models (DeepSeek, Qwen, Llama and more) plus GPU cloud · CometAPI: one API for 500+ models (GPT, Claude, Gemini and more) at about 80% of official prices. Prices there follow each platform's own catalog and can differ from the list prices tracked here.

Run it on AI/ML API →Run it on Novita AI →Run it on CometAPI →

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Compare MoonshotAI: Kimi K3.1 Pro with other models

MoonshotAI: Kimi K3.1 Pro vs MoonshotAI: Kimi K2 0711MoonshotAI: Kimi K3.1 Pro vs MoonshotAI: Kimi K2.5MoonshotAI: Kimi K3.1 Pro vs MoonshotAI: Kimi K2 ThinkingMoonshotAI: Kimi K3.1 Pro vs MoonshotAI: Kimi K2 0905MoonshotAI: Kimi K3.1 Pro vs MoonshotAI: Kimi K2.7 CodeMoonshotAI: Kimi K3.1 Pro vs MoonshotAI: Kimi K2.6

Frequently asked questions

How much does MoonshotAI: Kimi K3.1 Pro cost?

MoonshotAI: Kimi K3.1 Pro costs $2 per 1M input tokens and $10 per 1M output tokens (list price, snapshot October 24, 2026). At 10M input + 2M output tokens per month that is about $40.

What is the context window of MoonshotAI: Kimi K3.1 Pro?

MoonshotAI: Kimi K3.1 Pro has a context window of 1,048,576 tokens and can return up to 943,718 output tokens per response.

What are cheaper alternatives to MoonshotAI: Kimi K3.1 Pro?

Cheaper models include Z.ai: GLM 5.3 Prime ($2.8 in / $8.8 out), OpenAI: GPT-5.1-Codex-Max ($1.25 in / $10 out), OpenAI: GPT-5.1 ($1.25 in / $10 out). See the full list on this page.

Is MoonshotAI: Kimi K3.1 Pro free to use?

No. MoonshotAI: Kimi K3.1 Pro is a paid model at $2 input / $10 output per 1M tokens. 20 free models are listed on the free models page.

Provider: moonshotai · Model ID: moonshotai/kimi-k3.1-pro · Modality: text+image+video->text · Price snapshot October 24, 2026, refreshed daily. How we collect prices