Qwen2-0.5B-FP8

Qwen2-0.5B — FP8 (dynamic)

FP8 quantization of Qwen/Qwen2-0.5B, published by Liodon AI.

Quantized with llm-compressor using the FP8_DYNAMIC scheme: weights are cast to FP8 (E4M3) per-channel ahead of time, activations are quantized to FP8 dynamically per-token at inference time. No calibration dataset is needed for this scheme, so the quantized weights are numerically just a direct cast of the original — no calibration-set bias to worry about. lm_head is left unquantized (standard practice — negligible size, disproportionate quality impact if quantized).

Original size: 1.0 GB → Quantized: 0.6 GB.

Quick Start

vLLM

vllm serve liodon-ai/Qwen2-0.5B-FP8

Text Generation Inference (TGI)

docker run --gpus all -p 8080:80 ghcr.io/huggingface/text-generation-inference \
    --model-id liodon-ai/Qwen2-0.5B-FP8

SGLang

python -m sglang.launch_server --model-path liodon-ai/Qwen2-0.5B-FP8

FP8 execution requires an NVIDIA GPU with compute capability ≥ 8.9 (Ada/Hopper/Blackwell — RTX 40-series, L4/L40S, H100/H200, B100/B200/GB10). On older GPUs, vLLM/TGI will dequantize to run, which loses the speed/memory benefit.

Source

• Model: Qwen/Qwen2-0.5B
• License: other

Citation

@misc{liodonai_qwen2_0_5b_fp8,
  title        = {Qwen2-0.5B — FP8},
  author       = {{Liodon AI}},
  year         = {2026},
  howpublished = {\url{https://huggingface.co/liodon-ai/Qwen2-0.5B-FP8}},
  note         = {FP8 (dynamic) quantization of Qwen/Qwen2-0.5B}
}

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Quantized by Liodon AI