Directory / LLM API / Kimi (K3.1 Pro)
Kimi (K3.1 Pro)
Moonshot AI's assistant, coding agent (Kimi Code) and API, now powered by K3.1 Pro: a 3T-class open-weight model with a 1M-token context, strong at coding, game/3D creation and agentic work.
💲 API is billed per token (input, output and cached input) with automatic context caching; see the pricing page for current K3.1 Pro rates. Full model weights promised by Nov 4, 2026. Source: platform.kimi.ai (checked Oct 24, 2026).
Pros & cons
👍 Pros
- Open-weight frontier-class model with a 1M-token context window
- Self-reported 65.7% on Terminal-Bench 4.0, close to top closed models
- Works with game engines (Unity, Unreal, Godot) and Three.js; Highspeed variant is 2-3x faster
👎 Cons
- Benchmarks are self-reported
- Weights not out yet at launch (due by Nov 4)
Latest release
Kimi K3.1 Pro and K3.1 Pro Highspeed
First model in the K3.1 series, a post-trained K3 with much more RL; available on Kimi.ai, Kimi Work, Kimi Code and the Kimi API, with a Highspeed version at 2-3x the speed. Also launched 3D Make for previewing and exporting 3D models. Source ↗
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