Deepseek Flash Model Doomlooping and Generating Gibberish

Best_Sail5 · reddit · 2026-09-02

A user reports that the official Deepseek-V4-Flash-0731 model deployed via vLLM occasionally deviates into doomloops or generates gibberish. While often seen in heavily quantized models, this occurs with the official release. The user provided detailed vllm serve configurations, including FP8 KV cache, speculative decoding, and MoE backend settings, seeking help to troubleshoot the issue.

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