Introducing Kimi K3.1 Pro by Moonshot AI
Moonshot has released Kimi K3.1 Pro on its API with competitive pricing and performance close to leading frontier models, alongside a commitment to release full open weights by November 4, 2026. This is a significant industry development because it represents the first time an upcoming open-weight model achieves performance scores competitive with top closed-source frontier models at a fraction of the cost. The model is priced at $2.00 per million input tokens and $10 per million output tokens, with a 'Highspeed' version available at twice the price for faster inference, and supports varying levels of reasoning effort.
## BACKGROUND
Moonshot AI is a prominent Beijing-based artificial intelligence company known for developing the Kimi series of large language models. Artificial Analysis is an independent platform that benchmarks and compares AI models across key metrics such as intelligence, speed, and price.