Qwen3.5-9B-FP8-dynamic
Model Overview
- Model Architecture: Qwen/Qwen3.5-9B
- Input: Text / Image
- Output: Text
- Model Optimizations:
- Weight quantization: FP8
- Activation quantization: FP8
- Model size: 14.0 GB (reduced from 19.3 GB in BF16)
- Release Date: 2026-05-11
- Version: 1.0
- Model Developers: RedHatAI
This model is a quantized version of Qwen/Qwen3.5-9B. Evaluation results and reproduction steps are provided below.
Model Optimizations
This model was obtained by quantizing the weights and activations of Qwen/Qwen3.5-9B to FP8 data type, ready for inference with vLLM.
This optimization reduces the model weights from 19.3 GB to 14.0 GB on disk (~27% reduction). Activations are quantized dynamically at inference time using per-tensor scaling, requiring no calibration data.
Only the weights and activations of the linear operators within transformer blocks are quantized using LLM Compressor.
Deployment
Use with vLLM
- Initialize vLLM server:
Multimodal (vision + text):
Text-only (lower memory):
- Send requests to the server:
Creation
This model was created by applying LLM Compressor using data-free FP8 dynamic quantization, as presented in the code snippet below.
Package versions
llm-compressor==0.10.1.dev44+g437f8afe
compressed-tensors==0.14.1a20260325
transformers==5.3.0
vllm==0.18.1
lm-eval — neuralmagic/lm-evaluation-harness@741f1d8 (branch: mmlu-pro-chat-variant)
lighteval — neuralmagic/lighteval@6f0f351 (branch: eldar-fix-litellm)
Evaluation
This model was evaluated on GSM8k-Platinum, MMLU-Pro, IFEval, Math 500, AIME 2025, and GPQA Diamond using lm-evaluation-harness and lighteval, with inference served via vLLM.
Accuracy
Reproduction
The results were obtained using the following commands. GSM8k-Platinum, MMLU-Pro, IFEval, Math 500, and GPQA Diamond were each run 3 times with different seeds and results averaged. AIME 2025 was run 8 times. The vLLM server was started with --language-model-only for all evaluations.
GSM8k-Platinum (lm-eval, 0-shot, 3 repetitions)
Seeds used: 42, 1234, 4158
MMLU-Pro (lm-eval, 0-shot, 3 repetitions)
Seeds used: 42, 1234, 4158
IFEval (lm-eval, 0-shot, 3 repetitions)
Seeds used: 42, 1234, 4158
Math 500 (lighteval, 0-shot, 3 repetitions)
Seeds used: 42, 1234, 4158
AIME 2025 (lighteval, 0-shot, 8 repetitions)
Seeds used: 42, 1234, 1356, 3344, 4158, 5322, 5678, 9843
GPQA Diamond (lighteval, 0-shot, 3 repetitions)
Seeds used: 42, 1234, 4158