What this checkpoint preserves (measured 2026-09-02, paired comparison against the bf16 original)
Table with columns: Axis, bf16 original, NVFP4 (this model), Verdict| Axis | bf16 original | NVFP4 (this model) | Verdict |
|---|
| T=0 anchor response | short polite-register short answers | identical output | style survives |
| Free-generation bullet-list rate (n=200) | 2.0% | 2.0% | Same |
| Free-generation median length | 220 characters | 249 characters | Similar |
| KMMLU (same items, n=500) | — | Δ−2.4pp, z=1.09 | not distinguishable |
| HAE-RAE (same items, n=199) | — | Δ+4.9pp, z=0.41 | not distinguishable |
Measured serving (1x B200, vLLM 0.28, gpu-mem-util 0.90): KV cache 2,143,277 tokens,
maximum concurrency 8.18x at a 262,144-token request size.
Honest caveats:
- "Not distinguishable" is not "no loss." With this sample (n=500/199), a fine-grained
loss on the order of 1-2pp is below the detection limit.
- The median-length shift 220→249 characters is a directional observation and has not
gone through a sample-spread significance test.
- Quantization rebuild spread (the difference between running the same recipe twice) has
not been separately measured.
- All of the original model's caveats (judge uncalibrated, safety inherited as-is from
base, etc.) are inherited in full.
Usage
from vllm import LLM
llm = LLM(model="ThakiCloud/Qwen3.8-27B-Human-KO-NVFP4",
max_model_len=262144, trust_remote_code=True)
NVFP4 kernels run on SM100+ (B200, etc.). On architectures below that, the model may
fail to load or run much slower on a fallback kernel. If you need the bf16 original, use
the base_model repo.
License
Apache-2.0 (same as the original). NOTICE and DATA_PROVENANCE.md carry the same content
as the original repo.