Moonshot AI's Kimi K3.1 Pro Available via API, Open Weights Coming November 4

China's Moonshot AI released its Kimi K3.1 Pro model via a hosted, OpenAI-compatible API this week, with full open-weight files due shortly.

Key Points:

• A post-trained variant of Moonshot's Kimi K3 model

• Available now via hosted API with a 1-million-token context window

• Aimed at coding, agentic tasks, and financial research

• Pricing at $10 per million input/output tokens

• Full open-weight files (3-trillion parameters) due November 4, enabling self-hosting

• Represents a leading option on the Chinese open-weight model track

Why It Matters: This gives developers a chance to experiment with a leading Chinese open-weight model's capabilities via API now, ahead of being able to self-host when the weights release next week.