Laguna-XS.2 GGUF (BF16 + Q4_K_M)

GGUF conversions of poolside/Laguna-XS.2 for use with lucebox-hub.

Files

File Quant Size BPW Notes
laguna-xs2-bf16.gguf BF16 66.9 GB 16.01 reference, identical math to HF transformers fp/bf16
laguna-xs2-Q4_K_M.gguf Q4_K_M 20.3 GB 4.85 imatrix-calibrated, fits a single 24 GB GPU
laguna-xs2.imatrix imatrix 188 MB β€” Bartowski calibration_datav3 (134 chunks, 68608 tokens)

Quality

Metric BF16 Q4_K_M Ξ”
Perplexity (Bartowski v3, 20Γ—512) 10.7594 Β± 0.522 11.2854 Β± 0.553 +4.9%

Imatrix calibration uses Bartowski calibration_datav3.txt (multilingual + code mix), the same corpus Unsloth-distributed quants use.

Verified vs the official Poolside HF reference (BF16, eager attention, greedy decoding): logits match exactly for the first 30+ tokens on a B-tree explanation prompt; subsequent divergence is fp precision drift, not a graph bug.

Tested on RTX 3090 24GB and A100 80GB. Inference ~155 tok/s on A100 SXM Q4_K_M.

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