Prototype · closed beta
unOpen.AI
In closed beta: Roxy, a private AI assistant with permanent memory running on infrastructure the user owns. Brand, site, product, backend and conversational design.
Kimi · Moonshot AI
Kimi K3.1 Pro.
Kimi K3.1 Pro is a Moonshot AI model, released on 23 October 2026. It takes text, images and video and returns text, with a 1.05 million-token context window. Artificial Analysis scores it 46.0 on its Intelligence Index.
- Hosted API
- 1.05M context
Specification
- Provider
- Moonshot AI
- Family
- Kimi
- Released
- 23 October 2026
- Catalogue id
- moonshotai/kimi-k3.1-pro
- Context window
- 1.05 million tokens
- Maximum output
- 943,718 tokens
- Inputs and output
- Text, images and video in; text out
- Capabilities
- Tool calling, structured outputs and adjustable reasoning
- Weights
- Not published — hosted API
- Listed price
- $2.00 input, $10.00 output, $0.200 cached input per million tokens
Provider-published specifications as of 30 October 2026, not figures we measured. Model families move quickly — check the provider's own documentation before committing to a number.
Source: Kimi K3.1 Pro in the OpenRouter catalogue, checked weekly. Confirm current terms in Moonshot AI's own documentation before you commit.
INDEPENDENT RATINGS
How Kimi K3.1 Pro scores.
Measured by Artificial Analysis on its own evaluation suite, at every reasoning setting it tested.
Artificial Analysis Intelligence Index · Higher is better · Linear scale from 0 to 66.0
- Gemini 4 Carbon
- 59.4
- Claude Opus 5.5
- 58.4
- GPT-6 Astra
- 56.9
- Muse Wonder Full
- 49.7
- Kimi K3.1 Pro
- 46.0
The highest-rated model of each other family we cover, at its best reasoning setting.
Source: Artificial Analysis. Checked 30 October 2026. Measured independently by Artificial Analysis, not by QQuantum.ai or the providers.
BENCHMARKS
Benchmark by benchmark.
Score (%) at its best reasoning setting · Higher is better · Linear scale from 0 to 100.0
- Humanity's Last Exam
- 52.5
- SciCode
- 60.8
- Terminal-Bench 4.0 (agentic coding)
- 67.2
- AA-LCR (long-context reasoning)
- 86.3
Each evaluation run by Artificial Analysis under its published methodology. Scores on public benchmarks can overstate performance on your own data.
Source: Artificial Analysis. Checked 30 October 2026. Measured independently by Artificial Analysis, not by QQuantum.ai or the provider.
What it costs
Price the whole answer.
Illustrative calculation at listed rates: a batch of 10 million input tokens and 1 million output tokens costs $30.00 on Kimi K3.1 Pro. A thousand requests of 2,000 input and 500 output tokens each costs $9.00. Calculation: input millions × input rate + output millions × output rate; it excludes reasoning tokens, retries, tools, tax and review time.
Compare cost per accepted result, not per token: replay the same work on two or three candidates and count the answers you would actually ship. Our model-routing approach sends each request to the cheapest model that passes.
THE REST OF THE FAMILY
Other Kimi models.
Every Kimi model in the catalogue. Our Kimi page covers where the family fits and how we evaluate it.
| Kimi K3.1 Pro | 23 Oct 2026 | 46.0 | 30 | 1.05M | $2.00 | $10.00 |
|---|---|---|---|---|---|---|
| Kimi K3 open | 16 Jul 2026 | — | — | 1.05M | $0.192 | $15.00 |
| Kimi K2.7 Code open | 12 Jun 2026 | — | 48 | 262k | $0.600 | $3.50 |
| Kimi K2.6 open | 20 Apr 2026 | — | — | 262k | $0.650 | $3.41 |
| Kimi K2.5 open | 27 Jan 2026 | — | — | 262k | $0.500 | $2.50 |
| Kimi K2 Thinking open | 6 Nov 2025 | — | — | 262k | $0.600 | $2.50 |
| Kimi K2 0905 open | 5 Sep 2025 | — | — | 262k | $0.600 | $2.50 |
| Kimi K2 0711 open | 11 Jul 2025 | — | — | 131k | $0.570 | $2.30 |
Intelligence and coding: Artificial Analysis indices at the model's best reasoning setting, and its measured output speed. Context and prices: the OpenRouter catalogue list price in USD per million tokens. Released: the provider's date where Artificial Analysis records one, otherwise the date the catalogue first listed it. Refreshed weekly; not measured by QQuantum.ai. Select a heading to sort.
Questions
Questions about Kimi K3.1 Pro.
When was Kimi K3.1 Pro released?
Kimi K3.1 Pro was released on 23 October 2026, according to Artificial Analysis.
What is the context window of Kimi K3.1 Pro?
1.05 million tokens, with up to 943,718 output tokens per response, as listed in the OpenRouter catalogue on 30 October 2026. A long window is not the same as reliable recall across it; evaluate retrieval on your own documents.
How much does Kimi K3.1 Pro cost?
The catalogue lists $2.00 per million input tokens and $10.00 per million output tokens, and $0.200 per million cached input tokens (checked 30 October 2026). Moonshot AI's own rates, batch discounts and cloud marketplaces can differ.
How does Kimi K3.1 Pro rate against other Kimi models?
Artificial Analysis gives it 46.0 on its Intelligence Index at its best reasoning setting. A composite score is a shortlist tool; your own task decides.
Can Kimi K3.1 Pro run on our own hardware?
The catalogue lists no published weights for it, so it is used as a hosted API. Where data may not leave your infrastructure, an open-weight model is the alternative.
