Moonshot's kimi K3.1 model leaked ahead of release

On September 28, 2026, developers noticed the 'kimi-k3-1' identifier in Moonshot's API platform, which passed interface detection and is callable. Later that day, Kimi's official open platform previewed the K3.1 or K3 11111 model, supporting a 1M token context window. Kimi K3.1 is expected to support up to 1 million tokens, with Low, High, and Max inference intensity options, potentially including Agent mode, Swarm collaboration, and task modes like search and batch processing. Developers suggest the multi-tiered inference settings may correspond to different compute resource allocations and pricing models. Kimi's open platform indicates K3.1's API pricing matches the current K3, though it may be a placeholder.