Kimi
Powerful AI assistant with Agent Swarm, 256K context, multimodal vision, visual coding, and plans from free to $199/mo. Powered by K2.6 (and K2.5), built by the fastest decacorn in AI.
What it is
Kimi is an AI assistant built by Moonshot AI, a Chinese AI company founded by former Google Brain and Meta AI researchers. Moonshot AI became the fastest company to reach a $10 billion valuation (decacorn), reflecting the rapid adoption and investor confidence in their technology. It is available as a web app, mobile app (iOS and Android), and developer API. Kimi handles conversations, writing, coding, research, document analysis, and complex multi-step agent tasks. What sets Kimi apart is that its underlying models (K2.6 flagship and K2.5) are open source, frontier competitive, and dramatically cheaper to run than their closest rivals from OpenAI, Anthropic, and Google. K2.5 gained additional visibility after it was revealed that Cursor uses Kimi K2.5 in its Composer 2 feature, a licensing arrangement that sparked debate about model attribution and transparency in AI tooling.
Who it is for
Anyone who wants a free, capable AI chatbot with 256K context, web search, file uploads, and deep research built in
People tackling large, complex tasks where Agent Swarm can coordinate dozens of parallel sub agents automatically
Cost conscious teams and startups who need frontier level performance at a fraction of OpenAI and Anthropic pricing
Researchers and analysts who need to process long documents, entire codebases, or multi source investigations
Developers seeking an open source frontier model for fine tuning, self hosting, and custom deployment
Pros and cons
Pros
- +Frontier level performance at a fraction of the cost of GPT-5.4, Claude Opus 4.6, and Gemini Pro 3.1
- +Open source weights under Modified MIT License; you can self-host, fine-tune, and inspect the model
- +Agent Swarm is a genuinely novel capability: up to 300 parallel agents coordinating without predefined roles
- +Strong multimodal vision with competitive scores on image and video benchmarks versus top competitors
- +256K token context window handles very long documents and entire codebases in a single session
- +Available globally with English interface, USD API pricing, and distribution through US based providers (Fireworks, OpenRouter)
- +Kimi Code provides a free, open source CLI coding agent comparable to Claude Code with MCP support
- +Input caching at $0.10 to $0.16 per million tokens dramatically reduces costs for repeated or iterative tasks
- +Moonshot AI became the fastest company to reach a $10 billion valuation (decacorn), signaling strong market confidence and financial backing for continued development
Cons
- −Newer and less established than ChatGPT, Claude, or Gemini with a smaller community and fewer integrations
- −Consumer app ecosystem is less mature; fewer features like memory, projects, or connectors compared to Claude or ChatGPT
- −WeirdML benchmark score of 46% suggests weaker performance on unusual or edge case reasoning compared to competitors
- −Agent Swarm is still in beta; expect rough edges and inconsistent results on some tasks
- −Documentation and support resources are less comprehensive than those from OpenAI or Anthropic
- −The company is based in Beijing, which may raise data residency or regulatory concerns for some organizations (though US based API providers like Fireworks mitigate this)
- −Paid consumer plan details are less transparent than competitors; pricing may vary by region
- −Consumer app writing quality does not yet match Claude for nuanced, natural sounding prose
- −Cursor licensing controversy revealed that Cursor uses Kimi K2.5 in its Composer 2 feature, raising questions about model attribution and transparency when third party tools bundle Kimi's model without clear disclosure
Pricing
- Basic conversations
- Standard usage limits
- 256K context window
- Extended agent quota
- Agent multi-tasking
- Agents with 4x speed and priority access
- Everything in Moderato
- 2x agent quota
- 2x usage quota for K2.5 model
- Unlimited Slides visual mode
- Everything in Moderato
- 5x agent quota
- 2x agent multi-tasking
- Everything in Moderato
- 10x agent quota
- 2x agent multi-tasking
Prices change; check the official pricing →