Total runs:
520.2K
Run Growth:
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Growth Rate:
46.42%
Sponsored by
APIMart
z-lab / Qwen3.5-4B-DFlash
Model's Last Updated: June 20 2026
text-generation
Introduction of Qwen3.5-4B-DFlash
Model Details of Qwen3.5-4B-DFlash
Qwen3.5-4B-DFlash
This model is still under training.
DFlash is a novel speculative decoding method that utilizes a lightweight block diffusion model for drafting. It enables efficient, high-quality parallel drafting that pushes the limits of inference speed.
This model is the
drafter
component. It must be used in conjunction with the target model
Qwen/Qwen3.5-4B
. It was trained with a context length of 4096 tokens.
🚀 Quick Start
SGLang
Installation
uv pip install "git+https://github.com/sgl-project/sglang.git@refs/pull/16818/head#subdirectory=python"
Inference
python -m sglang.launch_server \
--model-path Qwen/Qwen3.5-4B \
--speculative-algorithm DFLASH \
--speculative-draft-model-path z-lab/Qwen3.5-4B-DFlash \
--speculative-num-draft-tokens 16 \
--tp-size 1 \
--dtype bfloat16 \
--attention-backend fa3 \
--mem-fraction-static 0.75 \
--trust-remote-code \
--mamba-scheduler-strategy extra_buffer \
--reasoning-parser qwen3 \
--tool-call-parser qwen3_coder
Early Results
- Thinking: enabled
- Max new tokens: 4096
-
Block size: 16
Dataset Accept Length GSM8K 6.174 Math500 6.841 HumanEval 6.909 MBPP 6.018 MT-Bench 5.326 Alpaca 5.012
Runs of z-lab Qwen3.5-4B-DFlash on huggingface.co
6.1K
Total runs
-3
24-hour runs
19
3-day runs
330
7-day runs
-874
30-day runs
More Information About Qwen3.5-4B-DFlash huggingface.co Model
Url of Qwen3.5-4B-DFlash
Qwen3.5-4B-DFlash huggingface.co Url
Provider of Qwen3.5-4B-DFlash huggingface.co
Other API from z-lab
Updated:August 25 2026
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