Kimi K3Open Weight
Released
Kimi K3 is an AI model released by Moonshot AI on Thursday, Jul 16 2026, 34 days after Kimi K2.7 Code. It is an open-weight model — the trained weights are available to download and run. It is a 2.8T parameter model with a 1M token context window. Benchmark results (shown below) cover DeepSWE 1.0, Supabase Evals, BullshitBench v2, DeepSWE 1.1, Next.js Evals, Terminal-Bench 2.1, and 9 more.
API pricing
- InputWhat you pay for everything you send the model — your question, plus any documents or earlier conversation you include with it.
- $3.00
- Cached inputA reduced rate for text you send over and over. If every request starts with the same instructions or the same document, the provider keeps a copy ready and charges less to read it again.
- $0.30
- OutputWhat you pay for the text the model writes back. It is normally the dearer half: producing an answer costs more than reading one.
- $15.00
Available from
| Makora | — | — | $2.55 | $12.75 | 1M | — |
|---|---|---|---|---|---|---|
| Sail Research | — | — | $2.60 | $13.00 | 1M | fp4 |
| Morph | — | — | $2.80 | $14.00 | 1M | fp4 |
| DigitalOcean | — | — | $2.85 | $14.25 | 1M | — |
| BaseTen | — | — | $3.00 | $15.00 | 1M | fp8 |
| Chutes | — | — | $3.00 | $15.00 | 1M | mxfp4 |
| Fireworks | — | — | $3.00 | $15.00 | 1M | — |
| Modal | — | — | $3.00 | $15.00 | 1M | mxfp4 |
| Parasail | — | — | $3.00 | $15.00 | 1M | fp4 |
| Phala | — | — | $3.00 | $15.00 | 1M | — |
| Fireworks | us | — | $3.30 | $16.50 | 1M | — |
| Alibaba | — | — | $3.45 | $17.25 | 1M | — |
| Morph | — | fast | $6.00 | $22.50 | 1M | fp4 |
| Fireworks | — | fast | $4.50 | $22.50 | 1M | — |
Benchmarks
Coding
Terminal & CLI
Agentic & tool use
Reasoning & science
Knowledge work
Multimodal
Robustness
About
Kimi K3, released July 16, 2026, was Moonshot AI's biggest swing yet: a 2.8-trillion-parameter mixture-of-experts model — billed as the world's first open 3T-class release — activating 16 of 896 experts per token, with a 1M-token context window and native vision built on the lab's Kimi Delta Attention architecture. At launch it scored 93.5% on GPQA Diamond, the strongest open-weight result on that benchmark published at the time, alongside 88.3% on Terminal-Bench 2.1.
Agentic work was the headline: 91.2% on BrowseComp — the best published score on this tracker at release — plus 56.0% on Humanity's Last Exam with tools and 84.2% on MCP Atlas. Moonshot's own framing placed K3 just behind Claude Fable 5 and GPT-5.6 Sol overall while undercutting both sharply on price, and the lab promised full open weights within days of the API launch — the same open-frontier playbook that began with K2 a year earlier, now at nearly triple the scale.
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Frequently asked questions
Kimi K3 was released by Moonshot AI on Thursday, Jul 16 2026.
Kimi K3 was built by Moonshot AI. Chinese AI company building the Kimi family of models. Founded in 2023, known for long-context and efficient MoE architectures.
Kimi K3 costs $3.00 per million input tokens and $15.00 per million output tokens through the Moonshot AI API. Cached input is $0.30 per million tokens. Rates are pay-as-you-go API prices verified against Moonshot AI's published pricing on August 18, 2026.
Kimi K3 reports 17 tracked benchmark scores — BullshitBench v2: 73%; DeepSWE 1.1: 69%; DeepSWE 1.0: 67.5%; Next.js Evals: 81%; Supabase Evals (with skills): 86.4%; Supabase Evals (no skills): 90.9%; Terminal-Bench 2.1: 88.3%; MCP Atlas: 84.2%; JobBench: 52.9%; Toolathlon-Verified: 73.2%; BrowseComp: 91.2%; Humanity's Last Exam (no tools): 43.5%; Humanity's Last Exam (with tools): 56%; GPQA Diamond: 93.5%; GDPval-AA v2: 1668; CharXiv Reasoning: 84.8%; MMMU-Pro: 81.6%. Scores are the figures published at release by Moonshot AI. It holds the best score among all models tracked here on DeepSWE 1.0.
Kimi K3 has a context window of 1M. That is the maximum amount of input plus output the model can hold in a single request.
Kimi K3 is reported at 2.8T parameters.
Partly. Kimi K3 is an open-weight model: the trained weights are free to download and run locally or on your own infrastructure, but the training data and code are not fully released and the license may restrict some commercial uses. It is not open source in the strict sense.
Moonshot AI's previous tracked release was Kimi K2.7 Code on Jun 12 2026, 34 days earlier. It is the most recent Moonshot AI model tracked on AI Release Tracker.