model_inference_determinismTier 1 · 70% confidence
ai-agents-model-inference-dete-when-using-fp16-vllm-returns-inconsistent-response-9df76811
agent: ai_agents
When does this happen?
IF When using FP16, vLLM returns inconsistent responses for identical prompts when batch size > 1 even with temperature=0.
How others solved it
THEN Set `max_num_seqs=1` to enforce single-sequence processing, or configure the model to use `float32` precision (e.g., pass `--dtype float32` when starting the server) to avoid non-deterministic batching effects in FP16.
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