Qwen3.8 27B quant keeps full accuracy at 12.8GB

A GGUF benchmark found Qwen3.8 27B holds full accuracy at 12.8GB in the Unsloth Dynamic Q3_K_XL quant, testing everything from Q4 to Q1, per Kaitchup's benchmark. That fits under the 16GB ceiling most consumer cards top out at, so the full 27B model no longer forces a drop to a smaller checkpoint.

The comparison runs the full quant range down to Q1, where accuracy usually falls off first. Kaitchup hasn't published the per-quant numbers outside a paywall, so the 100% accuracy claim at Q3_K_XL is single-source. Nobody outside that one benchmark has confirmed it yet.

On r/LocalLLaMA, an owner of a 3090 Ti says they're already running Q3_K_XL with mmproj and full context, using a q4 KV cache on max thinking mode. That's one person's setup, not a second benchmark, but it lines up with what Kaitchup reported.

If that 100% figure doesn't hold up once someone tests it independently, the 12.8GB number stops being a reference point and goes back to being one newsletter's read.