At launch in October 2026, Kimi K3.1 Pro was priced at $2 per million input tokens and $10 per million output tokens on Moonshot AI's API

Moonshot AI's 3T-class model with a 1-million-token context window, released on October 23, 2026 through Moonshot's apps and API, with full open weights promised by November 4, 2026. Moonshot says it removed cyberattack-related training data before release, cutting the model's internal exploit-test score from 90.5% to 81%.