Kimi K3.1 Pro and K3.1 Pro Highspeed

Kimi K3.1 Pro demonstrates strong performance across coding, agentic, and knowledge benchmarks, rivaling top proprietary models. It scored 65.7% on Terminal-Bench 4.0, surpassing GPT-6 Astra (58.2%) and nearly matching Claude Opus 5.5 (66.4%). On Kimi Code Bench 3.0 Long-horizon, K3.1 Pro achieved 61.2%, an improvement over K3's 55.95%. The release of K3.1 Pro follows open-weight principles, aiming to enhance defensive dual-use capabilities and improve software security through broader access.