# Kimi K3.1 Pro Highspeed

Moonshot AI's Kimi K3.1 Pro and a faster Kimi K3.1 Pro Highspeed for interactive use are now callable through AI Gateway. K3.1 Pro is the first model in the K3.1 series, building on Kimi K3 with improvements in coding, 3D modeling, financial analysis and agentic tasks while keeping the 1M-token context window and image input. Moonshot says it makes fewer factual errors than earlier Kimi models on difficult prompts and plans to release the weights by November 4.

Moonshot AI's Kimi K3.1 Pro and a faster Kimi K3.1 Pro Highspeed for interactive use are now callable through AI Gateway. K3.1 Pro is the first model in the K3.1 series, building on Kimi K3 with improvements in coding, 3D modeling, financial analysis and agentic tasks while keeping the 1M-token context window and image input. Moonshot says it makes fewer factual errors than earlier Kimi models on difficult prompts and plans to release the weights by November 4.

Moonshot AI released Kimi K3.1 Pro, the first model in its K3.1 series and its most capable 3T-class open-weight model to date, with a 1-million-token context window, alongside a Highspeed variant delivering 2-3x the speed. It is a post-trained version of Kimi K3 built with substantially larger post-training compute, supported by optimizations across the RL framework, long-context inference, sandbox infrastructure and rollout scheduling. On Terminal-Bench 4.0, which tests coding agents on realistic terminal tasks, K3.1 Pro scores 65.7%, ahead of GPT-6 Astra at 58.2% and narrowly behind Claude Opus 5.5 at 66.4%.

Moonshot AI released Kimi K3.1 Pro, the first model in its K3.1 series and its most capable 3T-class open-weight model to date, with a 1-million-token context window, alongside a Highspeed variant delivering 2-3x the speed. It is a post-trained version of Kimi K3 built with substantially larger post-training compute, supported by optimizations across the RL framework, long-context inference, sandbox infrastructure and rollout scheduling. On Terminal-Bench 4.0, which tests coding agents on realistic terminal tasks, K3.1 Pro scores 65.7%, ahead of GPT-6 Astra at 58.2% and narrowly behind Claude Opus 5.5 at 66.4%.