Moonshot AI Releases Kimi K3.1 Pro, Challenging Frontier Models on Coding and 3D Design

Moonshot AI unveiled Kimi K3.1 Pro on October 24, 2026, a new open-weight model positioned as the company's most capable 3T-class offering to date. With a 1-million-token context window, 2.8 trillion total parameters, and 104 billion active mixture-of-experts capacity, the model aims to compete directly with proprietary systems from Anthropic and OpenAI while maintaining an open-weights release roadmap.