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Qwen 3.8 27B tool calling crashes on vllm-mlx 0.4.1

This story is from 2026-08-22. It is preserved in the archive; the latest stories are on the live feed.

TL;DR: Qwen 3.8 27B (mlx-community/Qwen3.8-27B-4bit) crashes on every tool-calling request in vllm-mlx 0.4.1 with RuntimeError: There is no Stream(gpu, N) . Non-tool chat works fine. Root cause: the model ships with vision_config , which triggers a broken threading path. Serving through Ollama as a…

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Timeline · 1 report

  1. 2026-08-22 13:06 · r/LocalLLM
    Qwen 3.8 27B tool calling crashes on vllm-mlx 0.4.1

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