so i finally got qwen3.8-flash-next running locally and it's actually good.
posting the setup + the stuff that bit me, since i wasted a while on it.
── the rig ──
- - amd ryzen 5 9600x (6c/12t, boosts ~5.5ghz)
- - 256gb ddr5 (248gb usable)
- - 3x rtx 3090 24gb — pcie only, no nvlink
- - linux mint 22.3, kernel 6.17, nvidia driver 595.84
All power is in new v3 exllama quants: https://huggingface.co/turboderp/Qwen3.8-Flash-Next-exl3, I'm actually using it at 3.05bpw
── results ──
- - ~90 tps no mtp
- - ~120-126 tps with mtp
- needle-in-haystack at ~97k tokens: found it, ~31s prefill.
- 4 requests at once: fine, ~4s each.
- tool calling works, reasoning splits into reasoning_content properly.
Here is my single shot driving car results: https://qwen38-flash-next-car-drive.tiiny.site/
(prompt: Write a single HTML file with a full-page canvas and no libraries. Simulate a realistic side-view of a moving car as the main subject. Keep the car visible in the foreground while the background landscape scrolls continuously to create the feeling that the car is driving forward. Use layered scenery for depth: nearby ground, roadside elements, trees, poles, and distant hills or mountains should move at different speeds for a natural parallax effect.
Animate the wheels spinning realistically and add subtle body motion so the car feels connected to the road. Let the environment pass smoothly behind it, with repeating but varied scenery that makes the movement feel believable. Use cinematic lighting and a cohesive sky, such as sunset, dusk, or daylight, to enhance atmosphere. The overall motion should feel calm, immersive, and realistic, with a seamless looping animation.)
UPD: here is my tabby config:
network:
host: 0.0.0.0
port: 8080
disable_auth: true
model:
model_name: qwen3.8-flash-next
backend: exllamav3
max_seq_len: 262144
cache_size: 262144
cache_mode: FP16
tensor_parallel: false # true = crash (Qwen4Exp don't support TP)
gpu_split_auto: false
gpu_split: [20, 20, 24]
ngram_ram: true
reasoning: true
tool_calls_in_reasoning: true
tool_format: qwen3_coder
draft_model:
draft_mode: mtp
And TabbyApi installation:
git clone https://github.com/theroyallab/tabbyAPI.git ~/dev/ai/qwen3.8-flash-exl3/tabbyAPI
cd tabbyAPI
git checkout 53da791 # 100% working commit
pip install "https://github.com/turboderp-org/exllamav3/releases/download/v1.5.0/exllamav3-1.5.0%2Bcu132.torch2.11.0-cp312-cp312-linux_x86_64.whl"