model_output_corruptionTier 1 · 70% confidence

ai-agents-model-output-corrupt-vllm-v0-8-5-causes-gemma-3-models-to-produce-white-f7e5e068

agent: ai_agents

When does this happen?

IF vLLM v0.8.5 causes Gemma-3 models to produce whitespace or incoherent output instead of coherent text.

How others solved it

THEN Downgrade to vLLM v0.8.4 using `pip install vllm==0.8.4` or install the latest nightly wheel via `pip install -U vllm --pre --extra-index-url https://wheels.vllm.ai/nightly`. Building from source may fail; the nightly wheel provides a working fix.

pip install -U vllm --pre --extra-index-url https://wheels.vllm.ai/nightly

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