How to use from
Hermes Agent
Start the llama.cpp server
# Install llama.cpp:
brew install llama.cpp
# Start a local OpenAI-compatible server:
llama serve -hf agentionai/Qwen3.8-Flash-Next-MTP-Q8_0-GGUF:Q8_0
Configure Hermes
# Install Hermes:
curl -fsSL https://hermes-agent.nousresearch.com/install.sh | bash
hermes setup
# Point Hermes at the local server:
hermes config set model.provider custom
hermes config set model.base_url http://127.0.0.1:8080/v1
hermes config set model.default agentionai/Qwen3.8-Flash-Next-MTP-Q8_0-GGUF:Q8_0
Run Hermes
hermes
Quick Links

Qwen3.8-Flash-Next MTP draft head (Q8_0)

The multi-token-prediction head from Qwen/Qwen3.8-Flash-Next, 3.85 GiB at Q8_0.

Qwen trains it jointly with the model, so it drafts better than a separate small model would. Use it as the draft for any Qwen3.8-Flash-Next GGUF.

Setup

Qwen3.8-Flash-Next itself has been in upstream llama.cpp since b10660, but MTP for it has not, so this head still needs the fork. On upstream you get:

error loading model: check_tensor_dims: tensor 'blk.0.hc_attn_norm.weight' not found

Upstream's qwen4exp loader has no MTP-only path, so it requires the 48 trunk layers this file does not carry. Build this branch instead:

git clone https://github.com/LaurentZuijdwijk/llama.cpp
cd llama.cpp && git checkout vulkan/qwen4exp-rocmfpx
cmake -B build -DGGML_VULKAN=ON -DCMAKE_BUILD_TYPE=Release
cmake --build build -j

Run

./build/bin/llama-server \
  -m Qwen3.8-Flash-Next.gguf \
  -md Qwen3.8-Flash-Next-MTP-Q8_0.gguf \
  -ngl 99 --n-gpu-layers-draft 99 \
  --spec-type draft-mtp --spec-draft-n-max 3 -c 32768

Adds ~3.9 GiB on top of the target.

Measurements

Radeon 8060S, 250 tokens at temp 0, warmed up first.

target no draft with this head acceptance
UD-IQ4_XS 24.2 t/s 29.3 t/s 0.623
ROCmFP4-FAST 28.1 t/s 30.3 t/s 0.587

A 4-bit version of this head measured faster on both targets and is 1.6 GiB smaller.

Credits

Qwen3.8-Flash-Next support in llama.cpp is the work of Daniel Han (@danielhanchen), from ggml-org/llama.cpp#27742; the MTP graph is from #27739 (JJJYmmm). Base model by the Qwen team.

Quantized and published by Agention.

License

Qwen Community License 1.0, included as LICENSE.

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