Kimi
Moonshot AI's assistant, powered by the 2.8T open-weight Kimi K3 model.
Moonshot AI's assistant, powered by the 2.8T open-weight Kimi K3 model.
Moonshot AI's assistant on the 2.8T open-weight Kimi K3 — frontier-class coding and a 1M-token context, with weights you can self-host.
About Kimi
Kimi is the AI assistant from China's Moonshot AI, powered by its Kimi K3 model, a 2.8-trillion-parameter open-weight mixture-of-experts model with native multimodal understanding and a 1-million-token context window. K3 launched as the largest open-weight model to date and opened at number one on the Arena WebDev coding leaderboard, ahead of Claude Fable 5 and GPT-5.6 Sol. Because the weights are released openly, teams can self-host and fine-tune it, or use the hosted API. Kimi is strong on long-context reasoning, coding, and agentic multi-step tasks.
Kimi K3 is the clearest sign yet that open-weight models have caught the frontier: it tops a major coding leaderboard and ships a million-token context, all with downloadable weights. For teams that need self-hosting, privacy, or freedom from lock-in, it''s now a real frontier option rather than a compromise. The everyday chat app is still maturing versus ChatGPT and Claude, but on capability-per-dollar and openness, K3 is hard to beat.
Kimi pros and cons
Hand-derived from the catalog data, strengths and trade-offs to weigh before signing up.
- Free tier available; paid plans from Free chat; API from $3 / 1M tokens
- Includes an autonomous AI agent for multi-step tasks
- 2.8T-param open-weight MoE (16 of 896 experts active)
- 1M-token context window
- Native multimodal (vision)
- Competition is strong in this space, see Gemini and ChatGPT for comparison
Kimi vs Chat & Assistants
Side-by-side with the top 3 other chat & assistants in this category.
| Picked from the top tools in chat & assistants | Moonshot AI's assistant, powered by the 2.8T open-weight Kimi K3 model. | Google's multimodal AI integrated with Workspace and real-time search. | OpenAI's flagship conversational AI for writing, reasoning, and analysis. | Alibaba's open-source Qwen models in a free chat interface. |
|---|---|---|---|---|
| STARTS AT | Free chat; API from $3 / 1M tokens | $19.99/mo | $20/mo | Free |
| PRICING | Freemium | Freemium | Freemium | Free |
| AI AGENT | Yes | Yes | Yes | No |
| EDITOR'S PICK | No | No | Yes | No |
| KEY FEATURES | 2.8T-param open-weight MoE (16 of 896 experts active), 1M-token context window, Native multimodal (vision) | Gemini 3.8 Flash & 3 Pro models, Workspace integration, Deep Research | GPT-6 Astra + GPT-5.6 tiers, Advanced Voice Mode, Code interpreter | Qwen 3.8 Max, Vision and video, Open weights |
| BEST FOR | Long-document analysis (1M context), Coding & front-end generation, Self-hosted / private deployments | Workspace tasks, Research, Image understanding | Brainstorming, Writing, Research | Multilingual chat, Vision tasks, Coding |
| WORKS WITH | #chat#open-source#reasoning#long-context | #chatbot#multimodal#google | #chatbot#reasoning#assistant | #chatbot#open-source#multilingual |
Kimi, frequently asked questions
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Related tools
Google's multimodal AI integrated with Workspace and real-time search.
OpenAI's flagship conversational AI for writing, reasoning, and analysis.
Alibaba's open-source Qwen models in a free chat interface.
Open-weight reasoning models from China with free chat access.