Kimi K3.1 Pro Highspeed

• ⚡ Speed-tuned variant with substantially higher output throughput
• 📏 Massive 1M-token context window
• 👁️ Multimodal reasoning with vision input
• 🔧 Function calling and web search built in
• 🎯 Tuned for latency-sensitive coding and agentic work
• 🏢 Open-weight model from Moonshot AI

Moonshot

Moonshot is an AI research lab known for developing the Kimi family of large language models. The organization has gained recognition for building capable reasoning-oriented models, with the Kimi line representing its flagship series of text generation…

Kimi K3.1 Pro Highspeed is the throughput-optimized serving tier of Moonshot AI's open-weight multimodal reasoning flagship, pairing the same underlying quality as Kimi K3.1 Pro with markedly faster token generation. Released in October 2026 alongside the standard variant, it keeps the full one-million-token context window, so long-document analysis, whole-repository reading and extended agent traces remain on the table even at higher speed.

Within Moonshot's Kimi lineup — which spans general-purpose releases like Kimi K3 and Kimi K2.6, the coding-specialised Kimi K2.7 Code, and the low-latency Kimi K3 Fast — the Pro tier represents the top of the capability stack, and Highspeed is the configuration you reach for when response latency matters as much as answer quality. Capabilities include explicit reasoning, vision input, code-optimized generation, function calling and web search.

Best suited to interactive coding assistants, multi-step agentic pipelines and high-volume tool-calling workloads where long context and fast turnaround both matter.