Moonshot AI
Kimi K3.1 Pro
Kimi K3.1 Pro is Moonshot AI's flagship open-weight multimodal reasoning model and a post-trained successor to Kimi K3, with a 1M-token context window.
At a glance
- Input / 1M
- $2
- Output / 1M
- $10
- Context
- 1.05M
- Max output
- 944K
- Intelligence
- 55.1
- Released
- Oct 2026
Pricing
Kimi K3.1 Pro API pricing
Per-token rates, plus what common tasks actually cost.
| Input tokensPer 1M tokens | $2 |
|---|---|
| Output tokensPer 1M tokens | $10 |
| Cached input (read)Per 1M tokens | $0.20 |
| Cache writePer 1M tokens | Not available |
Chat message
2K in, 500 out
$9
per 1,000 requests
Coding task
30K in, 4K out
$100
per 1,000 requests
Long document summary
150K in, 2K out
$320
per 1,000 requests
Benchmarks
Kimi K3.1 Pro benchmark scores
Independent scores from Artificial Analysis. Higher is better.
Intelligence index
55.1
Coding index
Not available
Agentic index
Not available
Specs
Context window and capabilities
What it can read, what it can write, and which API features it supports.
- Context window
- 1.05M tokens
- Max output
- 944K tokens
- Input types
- Image, Text, Video
- Output types
- Text
- Reasoning effort
- Max, High, Low, None
- Release date
- October 23, 2026
- Tool calling
- Structured outputs
- JSON mode
- Reasoning
- Temperature
- Stop sequences
- Deterministic seed
- Verbosity control
Compare
Kimi K3.1 Pro vs other models
See how Kimi K3.1 Pro stacks up head to head on price, benchmarks, and features.
Kimi K3.1 Pro vs Claude Opus 5.5
Moonshot AI vs Anthropic
See comparisonKimi K3.1 Pro vs Claude Sonnet 5.5
Moonshot AI vs Anthropic
See comparisonKimi K3.1 Pro vs Claude Fable 5.1
Moonshot AI vs Anthropic
See comparison
Kimi K3.1 Pro vs GPT-6 Astra
Moonshot AI vs OpenAI
See comparison
Kimi K3.1 Pro vs Gemini 4 Argon
Moonshot AI vs Google
See comparisonKimi K3.1 Pro vs GPT-6.1 Sol
Moonshot AI vs OpenAI
See comparisonMore Kimi K3.1 Pro comparisons
- Kimi K3.1 Pro vs Claude Opus 5
- Kimi K3.1 Pro vs Claude Fable 5
- Kimi K3.1 Pro vs Muse Spark 1.3
- Kimi K3.1 Pro vs GPT-6 Sol
- Kimi K3.1 Pro vs Grok 4.7
- Kimi K3.1 Pro vs Kimi K3
- Kimi K3.1 Pro vs GLM 5.3 Flash
- Kimi K3.1 Pro vs DeepSeek V4.1 Flash 1017
- Kimi K3.1 Pro vs MiMo-V2.6-Flash
- Kimi K3.1 Pro vs DeepSeek V4.1 Flash
- Kimi K3.1 Pro vs Hy4 preview
Alternatives
Kimi K3.1 Pro alternatives
Similar models worth considering, and where each one has the edge.
Anthropic
Claude Opus 5.5
Anthropic
Claude Sonnet 5.5
Anthropic
Claude Fable 5.1
Want to learn about other models? Browse all models
FAQ
Frequently asked questions
How much does Kimi K3.1 Pro cost?
Kimi K3.1 Pro costs $2 per 1M input tokens and $10 per 1M output tokens through the API. A typical chat message costs about $9 per 1,000 messages.
What is the context window of Kimi K3.1 Pro?
Kimi K3.1 Pro accepts up to 1.05M tokens of input and can write up to 944K tokens in a single response.
What is the best alternative to Kimi K3.1 Pro?
Claude Opus 5.5 from Anthropic is a strong alternative. It offers: higher intelligence score, accepts file.
Can I use Kimi K3.1 Pro alongside other models?
Yes. Shortcut Chat sends one prompt to Kimi K3.1 Pro and any other models you pick at the same time, so you can compare answers side by side.
Try Kimi K3.1 Pro next to every other model.
Use Kimi K3.1 Pro alongside all the other models. Use one at a time, or multiple together. Get the best answer from every AI.