Benchmarking Qwen3.8 27B Quantizations: 4-bit Holds Up, 1-bit Collapses

pmigdal · reddit · 2026-08-27

The author benchmarked various Unsloth quantizations of Qwen3.8 27B on popular benchmarks including FPQA Diamond, IFBench, and Terminal-Bench-2.1. Results indicate that the Q4KM quantization performs robustly and is sufficient for most tasks, while the 1-bit quantization version collapses or shows severe performance degradation.

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