Kimi K2.6

Overview. Kimi K2.6 is Moonshot AI's open-weight flagship in the Kimi K2 family: a 1-trillion-parameter Mixture-of-Experts model with 32 billion active parameters per token. Built on a DeepSeek-V3-style transformer backbone with an added MoonViT vision encoder, it accepts text, image, and video input and returns text, with a toggleable Thinking mode for step-by-step reasoning. Released under a Modified-MIT license with open weights and a 262,144-token context window, it's aimed at developers who want a large-context, agentic model they can self-host or route through the Smart Router.

Key strengths. The model's clearest signal is its agentic design: Moonshot built K2.6 around multi-step tool-loop workflows, and its MoE architecture (384 experts, with 8 routed plus one shared expert active per token) keeps per-token compute manageable despite the 1T parameter count. Native INT4 quantisation in compressed-tensors format reduces the memory footprint for self-hosted Inference. Vision and video input, paired with optional Thinking-mode reasoning, extend its reach beyond pure text into multimodal, multi-step tasks.

When to use it. Reach for Kimi K2.6 when a task needs a long context window — up to 262,144 tokens — combined with multi-step, tool-calling agent behaviour, such as codebase-spanning research or long-document analysis that requires several tool calls in sequence. Turn on Thinking mode when visible chain-of-thought reasoning is more valuable than an instant single-pass answer. Its image and video input support also makes it a candidate for agent workflows that mix visual and text context.

Limitations. Independent reporting points to a knowledge cutoff around April 2025, but Moonshot has not published an official system card confirming this, so treat it as approximate. Output is text-only, with no audio or image generation. At 1T total parameters served with optional Thinking mode, expect higher latency than smaller interactive models, and no vendor-confirmed maximum output length distinct from the context window has been published.

Sovereignty note. Kimi K2.6 is created by Moonshot AI, based in China. It ships as open weights under a Modified-MIT license, so it can be self-hosted for full control over data residency; the currently listed hosted endpoint runs on a separate third-party provider, so teams with strict residency requirements should verify that endpoint's jurisdiction independently.