Audience

Software developers, AI engineers, researchers, financial analysts, and teams building applications or agentic workflows with AI models.

About Kimi K3.1 Pro

Kimi K3.1 Pro is a multimodal large language model developed by Moonshot AI for advanced reasoning, software development, 3D modeling, financial analysis, and autonomous AI agent workflows. The model uses a mixture-of-experts architecture with approximately 2.8 trillion total parameters and 104 billion active parameters, supporting a context window of one million tokens. Its coding capabilities include debugging existing applications, generating complete software projects, developing interactive websites, and creating applications with game engines. Kimi K3.1 Pro can analyze images, interpret spatial relationships, generate CAD scripts, and create three-dimensional assets from text descriptions or visual references. Its reasoning and tool-use capabilities support financial modeling, investment research, document analysis, and multistep business workflows. The model is available through Kimi's web and mobile applications, Kimi Work, Kimi Code, and the Kimi API, with a Highspeed variant.

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Pricing

Starting Price:
$2 per 1M tokens
Pricing Details:
API usage is pay-as-you-go: $2 per million input tokens and $10 per million output tokens. Cached input is $0.20 per million tokens; cache writes are $2 per million tokens. Kimi Code also provides tier-based membership access, with quotas and context limits depending on the tier.

Integrations

API:
Yes, Kimi K3.1 Pro offers API access
See Integrations

Ratings/Reviews - 1 User Review

Overall 5.0 / 5
ease 5.0 / 5
More Reviews for Kimi K3.1 Pro Write a Review

Company Information

Moonshot AI
Founded: 2023
China
www.kimi.ai/

Videos and Screen Captures

Kimi K3.1 Pro Screenshot 1
Kimi K3.1 Pro Screenshot 1 Kimi K3.1 Pro Screenshot 2
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Product Details

Platforms Supported
Cloud
Windows
Mac
Linux
On-Premises
Training
Documentation
Support
Online

Kimi K3.1 Pro Frequently Asked Questions

Q: What kinds of users and organization types does Kimi K3.1 Pro work with?
Kimi K3.1 Pro works with these users and organization types: Mid Size Business, Small Business, Enterprise, Freelance, Nonprofit, Government, and Startup.
Q: What languages does Kimi K3.1 Pro support in their product?
Kimi K3.1 Pro supports these languages: Chinese (Simplified) and English.
Q: What kind of support options does Kimi K3.1 Pro offer?
Kimi K3.1 Pro offers support via online.
Q: What other applications or services does Kimi K3.1 Pro integrate with?
Kimi K3.1 Pro integrates with: Vercel AI Gateway, AiAssistWorks, Alibaba AI Coding Plan, APIFree, Augment Code, Bash, Brokk, C, C++, C#, Cerebras, Cheaper Inference, Cherry Studio, Clarifai, Claude Code, Claw Code, Cline, ClinePass, Cloudflare, Command Code, CoreWeave, Cosmos, CSS, Dart, and EaseMate AI and more.
Q: Does Kimi K3.1 Pro have an API?
Yes, Kimi K3.1 Pro has an API.
Q: What type of training does Kimi K3.1 Pro provide?
Kimi K3.1 Pro provides training in the form of documentation.
Q: How much does Kimi K3.1 Pro cost?
Pricing for Kimi K3.1 Pro starts at $2 per 1M tokens.

Kimi K3.1 Pro Product Features

Kimi K3.1 Pro Verified User Reviews

Write a Review
  • A Kimi K3.1 Pro User
    Developer
    Used the software for: Less than 6 months
    Frequency of Use: Daily
    User Role: User
    Company Size: 100 - 499
    Ease 5 out of 5 stars
    Pricing 5 out of 5 stars
    Probability You Would Recommend? 9 out of 10

    "Open weight frontier power"

    5 out of 5 stars Posted 2026-10-24

    Pros: I can give it a large coding job, a research project, or a multi-step agent workflow and it does a much better job staying organized all the way through. Coding is probably the biggest jump. Moonshot reports a 65.7% score on Terminal-Bench 4.0, ahead of GPT-6 Astra’s reported 58.2% and just behind Claude Opus 5.5 at 66.4%. It feels especially good for terminal work, repo-level changes, and tasks where the agent has to keep using tools for a while. The 1M-token context window is also genuinely useful. I can keep a huge amount of source code, documentation, financial material, screenshots, and prior work in context without constantly trimming things down.

    Cons: The main downside is that the full weights are not available yet. Moonshot says they will be released soon, so the open-weight story is promising, but I would wait for that release before judging local deployment and customization.

    Overall: Overall, Kimi K3.1 Pro is a HUGE step forward from K3. It is strong at coding, long-horizon agents, visual understanding, and professional research, while staying reasonably priced enough to use heavily.

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