Qwen3.8 125B (6B active) Flash-Next

User compares vLLM and TensorFold running Qwen3.8-Flash-Next on a single DGX Spark (GB10, 128 GB unified memory). vLLM with an NVFP4 checkpoint, FP8 KV cache, and MTP with 3 draft tokens reaches 27.8 tok/s for a single request, while TensorFold with a 4-bit MLX checkpoint and int8 KV cache reaches 52.2 tok/s. At 5 concurrent requests, vLLM gives 78.5 tok/s and TensorFold 110.2 tok/s. Prompt processing is 1,500-1,730 tok/s for vLLM and 2,090-2,260 tok/s for TensorFold.