Kimi
Moonshot AI's frontier open-source model family, led by Kimi k2.5 with exceptional coding and long-context reasoning
Free consumer app at kimi.ai; open-weight model free to self-host; API pay-per-token via Moonshot platform
Overview
Kimi is Moonshot AI's AI assistant, notable for its extremely long context window that was among the first to support over 1 million tokens. This makes Kimi exceptional for tasks involving very long documents — entire books, codebases, or research corpora — where most models would need to truncate or summarize input.
Key Features
- Ultra-long context: processes documents up to 1 million tokens (entire books, large codebases)
- Strong Chinese-English bilingual performance
- File upload support for PDF, Word, Excel, and code files
- Kimi k1.5: reasoning-focused model with extended thinking capabilities
- Real-time web search for current events and fact-checking
- API access for developers building long-context applications
Pricing: Free tier with daily limits; Kimi Pro for higher usage; API via Moonshot API platform.
Pros
- Kimi k2.5 is fully open-source under Apache 2.0 with permissive commercial use
- 1T parameter MoE architecture with strong coding and math benchmarks
- 128K context window supports very long documents
- Competitive API pricing from Moonshot platform
Cons
- Primarily optimized for Chinese and English — limited other language support
- Smaller global ecosystem and integrations compared to Llama or Qwen
- Self-hosting the full model requires substantial GPU infrastructure
Tags
Product Updates
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