Best I tried so far is https://huggingface.co/nsparks/DeepSeek-V4-Flash-FP4-FP8-GGUF with the custom llama.cpp fork, but it suffers from low quality and random incoherent output. VLLM wouldn't support anything other than H100s for DS4. Any quantization out there that works on llama.cpp/vllm?
