quimmedes/Qwen3.8-Flash-Next-MTP-GGUF

Qwen 3.8 Flash Next - MTP Draft Speculative Model (GGUF)

This repository provides working MTP (Multi-Token Prediction) draft models in GGUF format for Qwen 3.8 Flash Next (and experimental architectures with hyper-connections / QSA / Hadamard KV rotations), powered by cafe-llama.cpp.

Compatible Engine

This MTP model requires the fork implementation supporting hyper-connection hidden states, QSA Hadamard KV rotation, and MTP layer graph generation:

• Repository: https://github.com/quimmedes/cafe-llama.cpp

git clone https://github.com/quimmedes/cafe-llama.cpp.git

Building from Source

Pick the backend for your hardware, then build. -j N sets the number of compile threads — a safe value is the number of physical cores.

1. NVIDIA CUDA (Windows / Linux)

cmake -B build -DGGML_CUDA=ON
cmake --build build --config Release -j 2

2. Vulkan (Cross-Platform AMD / Intel / NVIDIA) — requires the Vulkan SDK installed

cmake -B build -DGGML_VULKAN=ON
cmake --build build --config Release -j 2

3. AMD ROCm / HIP (Linux / Windows)

cmake -B build -DGGML_HIP=ON -DAMDGPU_TARGETS="gfx1100;gfx1030"
cmake --build build --config Release -j 2

4. Apple Metal (macOS)

cmake -B build -DGGML_METAL=ON
cmake --build build --config Release -j 2

5. CPU Only (AVX2 / AVX-512)

cmake -B build -DGGML_CUDA=OFF -DGGML_VULKAN=OFF
cmake --build build --config Release -j 2

Available Files

• mtp-Qwen3.8-Flash-Next-Q2_0.gguf: Quantized Q2_0 MTP draft model (~1.10 GB)
• mtp-Qwen3.8-Flash-Next-Q3_0.gguf: Quantized Q3_0 MTP draft model (~1.50 GB)
• mtp-Qwen3.8-Flash-Next-Q4_0.gguf: Quantized Q4_0 MTP draft model (~2.20 GB) - Recommended

Re-quantized from BF16 with llama-quantize (cafe-llama.cpp build c2f5366e3). The previous Q4_K_M/Q6_K/Q8_0/BF16 files were removed: they were produced from a broken conversion and did not work with speculative decoding.

Usage with llama.cpp / llama-server

Run llama-server or llama-cli with --spec-type draft-mtp and point -md to your preferred MTP file. Setting --spec-draft-n-max 2 provides optimal acceptance rate (~50-70%) for a 1-layer MTP draft head:

llama-server   -m Qwen3.8-Flash-Next-UD-IQ3_XXS-00001-of-00003.gguf   -md mtp-Qwen3.8-Flash-Next-Q4_0.gguf   --spec-type draft-mtp   --spec-draft-n-max 2   -ngl 999   -hmoe   -fa on   -ctk q8_0 -ctv q8_0 -kvu   -c 8192 -b 1024 -ub 128

CLI Example:

llama-cli   -m Qwen3.8-Flash-Next-UD-IQ3_XXS-00001-of-00003.gguf   -md mtp-Qwen3.8-Flash-Next-Q4_0.gguf   --spec-type draft-mtp   --spec-draft-n-max 2   -ngl 999   -hmoe   -fa on   -ctk q8_0 -ctv q8_0   -p "Explain quantum entanglement simply."