Kimi K3
Moonshot AI · Flagship · Jul 16, 2026Open weights
Moonshot AI's flagship: openly published weights, a one-million-token context and a strong showing on hard software-engineering tasks.
- Artificial Analysis Intelligence Index
- 43.6#12 of 29 · max effort
- API price per 1M tokens
- $3 / $15input / output · $6 blended
- Context window
- 1Mtokens
- Output speed
- 42 t/s51s to first answer at max effort
Benchmark results
Each row shows this model (blue) against every other model in the catalogue (grey), worst on the left, best on the right.
Overall capability
- Artificial Analysis Intelligence Index43.6#12 of 29
Max effort
- Epoch Capabilities Index157.4#6 of 16
- LiveBench79.2%#7 of 23
Coding
- SWE-Bench Pro (V2 Hard)88.2%#3 of 5
Mini-swe-agent harness, max effort
- Arena WebDev1,655#9 of 27
Max effort
Agents & professional work
- Vending-Bench 2$5,165#7 of 9
Reasoning
- ARC-AGI-260.4%#9 of 11
Max effort
- FrontierMath (Tiers 1–3)72.2%#9 of 14
Max effort
- MathArena50.5%#6 of 10
- SimpleBench60.7%#11 of 12
Max effort
Knowledge & science
- Humanity's Last Exam (Diamond)22.2%#7 of 9
- GPQA Diamond93.1%#6 of 14
Max effort
Human preference
- Arena Text1,488#6 of 24
Max effort
Reasoning effort trade-offs
The same model at different thinking budgets. More effort buys a higher intelligence score at a higher cost per task and a longer wait. Measured by Artificial Analysis.
| Effort | Score | Cost / task | First answer | Speed |
|---|---|---|---|---|
| Low | 30.1 | $1.15 | 53s | 41 t/s |
| Max (headline score) | 43.6 | $2.00 | 51s | 42 t/s |
Specs & pricing
- Developer
- Moonshot AI
- Released
- Jul 16, 2026
- Availability
- Generally available
- API model ID
kimi-k3- Weights
- Open · Kimi K3 License
- Parameters
- 2.8T (MoE)
- Reasoning
- Always on
- Accepts
- Text, Image, Video
- Produces
- Text
- Context window
- 1,048,576 tokens
- Input price
- $3 / 1M tokens
- Output price
- $15 / 1M tokens
- Cached input
- $0.30 / 1M tokens
Closest alternatives
Models from other labs nearest to Kimi K3 on Artificial Analysis Intelligence Index.
Claude Haiku 5.5
Anthropic
Intelligence 43.4 · $0.10 / $0.50
Compare side by sideGLM-5.3
Z.ai
Intelligence 44.8 · $1.40 / $4.40
Compare side by sideGLM-5.3-Flash
Z.ai
Intelligence 41.8 · $0.15 / $0.50
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