K2-Horizon open-weight family (3.7B-375B, 512K ctx, Apache-2.0) gets day-0 vLLM support
HongyiWang10 · x · 2026-09-03
vLLM announced day-0 support for K2-Horizon: IFM released not just final weights but intermediate checkpoints, detailed data-construction recipes, training code, and fine-grained logs. The family spans six models from 0.9B/3.7B dense to a 375B-A23B MoE, all Apache-2.0 with 512K context and reasoning/tool-calling baked into checkpoints for agents and long documents — prototype small, scale up without changing stacks. The post also notes vLLM-Omni now serves MiniMax H3, an open-weight joint video/audio diffusion transformer served via an OpenAI-compatible /v1/videos API, generating H.264 MP4 with native stereo audio and supporting t2va, first/last-frame, and omni-reference editing modes.
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