Kimi K3.1 Pro: price, context window and capabilities
Kimi K3.1 Pro is a model from Moonshot AI (moonshotai/kimi-k3.1-pro). It supports reasoning. It supports tool use. It costs $2.00 per million input tokens and $10.00 per million output tokens, with a 1.0M-token context window.
What it costs in practice
Using the listed prices: a chat turn of 2,000 input and 500 output tokens costs about $0.0090, so 10,000 such turns cost about $90.00. Summarising a 100,000-token document into 2,000 tokens costs about $0.220. A long agent run that reads 1 million tokens and writes 50,000 costs about $2.50.
How it compares
Among the 40 models we track, Kimi K3.1 Pro ranks #28 by input price and #32 by output price (1 is cheapest), and #6 by context window (1 is largest). Models with the same tool and reasoning support that cost less per output token: DeepSeek V4 Flash 0731 ($0.169), Qwen3.8 Omni Flash ($0.470), Qwen3.8 Flash ($0.470), Claude Haiku 5.5 ($0.500). Models with a larger context window at the same or lower output price: Llama 4 Scout (1.3M), GPT-6.1 Sol Pro (1.1M), GPT-6.1 Sol (1.1M), GPT-6 Luna Pro (1.1M).
More from Moonshot AI
- Kimi K3: $0.239 in / $10.80 out, 1.0M context
- Kimi K2.7 Code: $0.671 in / $3.35 out, 262K context
- Kimi K2.6: $0.650 in / $3.41 out, 262K context
In the news
Prices and limits come from OpenRouter's public model catalogue, last synced 25 Oct 2026. Provider pricing can differ from OpenRouter's and changes often; confirm on the provider's own page before you commit. See the guide to choosing a model or the full comparison.
Feed, daily deep-dive and bytes — readable offline, with push alerts for the topics you follow.