Kimi K2.5 Fast

Kimi K2.5 Fast is the speed-optimized variant of Moonshot AI's flagship K2.5 model. It shares the same 1 trillion total parameter MoE architecture with 32B active parameters per token, but is specifically optimized for low-latency inference — achieving 414 tokens per second throughput, making it one of the fastest large-scale models available.

The optimization focuses on inference efficiency without significantly compromising output quality. The model retains the core capabilities of K2.5 — native multimodality, strong coding performance, and flexible operating modes — while delivering responses fast enough for real-time chat applications, voice agent backends, and interactive coding assistants.

Kimi K2.5 Fast is the recommended choice when you need K2.5-level capability but latency is a primary concern. It handles real-time conversational AI, interactive coding sessions, and voice-driven applications where users expect near-instant responses.