Moonshot AI · Released Oct 23, 2026Kimi K3.1 Pro
Multimodal Kimi model with 1M context and always-on reasoning for coding, 3D creation, financial research, and agentic work.
- Capability
- —No ECI score yet
- Input
- $2.00per 1M tokens
- Output
- $10.00per 1M tokens
- Context
- 1.05M131K max output
What it costs
- Input
- $2.00per million tokens
- Output
- $10.00per million tokens
- Cached input
- $0.20per million tokens
- Cache write
- $2.00per million tokens
- Blended (3:1)
- $4.00pricier than 85% of priced models
Typical monthly bills
| Monthly usage | Estimated cost |
|---|---|
| Side project2M input + 0.5M output tokens | $9.00 |
| Team assistant25M input + 5M output tokens | $100.00 |
| Production app250M input + 50M output tokens | $1,000 |
Official Moonshot AI API price, as listed on models.dev.
Independent benchmarks
Epoch AI has not published a Capabilities Index score for Kimi K3.1 Pro yet.
The details
- Lab
- Moonshot AI
- Released
- Oct 23, 2026
- Context window
- 1,048,576 tokens
- Max output
- 131,072 tokens
- Inputs
- Text, Images, Video
- Output
- Text
- Reasoning
- Adjustable effort low · high · max
- Tool calling
- Yes
- Structured output
- Yes
- Weights
- Proprietary
- API model ID
kimi-k3.1-proon Moonshot AI- Availability
- 17 API providerslisted on models.dev
More from Moonshot AI
About Kimi K3.1 Pro
How much does Kimi K3.1 Pro cost?
Kimi K3.1 Pro costs $2.00 input / $10.00 output per million tokens (official Moonshot AI API price). Cached input is $0.20 per million tokens, and writing to the cache costs $2.00. At a 3:1 input-to-output mix that is $4.00 per million tokens, more expensive than 85% of the 445 priced models we track.
What is the context window of Kimi K3.1 Pro?
Kimi K3.1 Pro accepts up to 1,048,576 tokens per request and can write up to 131,072 tokens in one response.
How good is Kimi K3.1 Pro?
Epoch AI has not published a Capabilities Index score for Kimi K3.1 Pro yet.
Is Kimi K3.1 Pro open source?
No. Kimi K3.1 Pro is proprietary; you use it through Moonshot AI’s API or partner platforms.
What inputs does Kimi K3.1 Pro support?
Kimi K3.1 Pro accepts text, images and video and replies in text. It is a reasoning model with low, high and max effort settings, supports tool calling and can return structured JSON output.
When was Kimi K3.1 Pro released?
Moonshot AI released Kimi K3.1 Pro on Oct 23, 2026.
What are the best alternatives to Kimi K3.1 Pro?
The closest current models from other labs on capability, price and release date are Pareto (Unbiased, $2.57 / $7.72), MiMo-V2.6-Pro-UltraSpeed (Xiaomi, $4.35 / $8.70), Fugu Max (Sakana AI, $2.00 / $6.00) and Qwen 3.8 Max Prime (Alibaba (Qwen), $4.00 / $12.00).