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c4 (NF4)| field | value |
|---|---|
| scheme | NF4 |
| method | bitsandbytes |
| simulated | no — native kernel |
| weight bits | 4 |
| activation bits | 16 |
| group / block size | 64 |
| symmetric | False |
| calibration | none — data-free |
| calibration sha256 | n/a |
c2 vs c3 isolates method (GPTQ vs AWQ) at equal bit-width, and is the study's headline control: 0.0276 vs 0.0661 pooled ASR with non-overlapping 95% CIs.Jeesup/safety-quant-phase0.