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M* (M-star): A Modular, Extensible, Serving System for Multimodal Models

mstar.stanford.edu · 3,359 words · saved by 1 readers

Composite models broke the single-loop assumption behind LLM serving. The Walk Graph fixes it.

Inference is no longer a single loop LLM serving systems like vLLM and SGLang are built on one assumption: that inference is a single autoregressive loop — prefill the prompt, then decode one token at a time until the model stops. The newest multimodal models break that assumption. Five families make it concrete: UMMs — BAGEL SpeechLMs — Orpheus Omni — Qwen3-Omni VLAs — π0.5 World models — V-JEPA 2 They are composite: built from structurally distinct components — vision encoders, transformer backbones, diffusion and flow heads, audio codecs, action and world-model predictors — wired…

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