Moonshot: Kimi K3.1 Pro API
The first model in the Kimi K3.1 series and Kimi's most capable flagship to date: a 3-trillion-class model with native visual understanding, a 1M-token context window, and major gains in coding, 3D creation, and financial research and modeling.
- Context window: 1,048,576 tokens
- Max output: 1,048,576 tokens
- Input: text, image, video
- Output: text
- Reasoning: Supported
- Tool calling: Supported
- File input: Supported
- Released: 2026-10-24
Frequently Asked Questions
What is the context window of Kimi K3.1 Pro?
Kimi K3.1 Pro supports a context window of up to 1,048,576 tokens.
Does Kimi K3.1 Pro support function calling?
Yes. Kimi K3.1 Pro supports tool / function calling.
Does Kimi K3.1 Pro support reasoning?
Yes. Kimi K3.1 Pro is a reasoning-capable model.