svd-safety-gemma2_9b_it_swift_remove40

A gemma-2-9b-it checkpoint compressed with Swift-SVD (dynamic rank allocation, alpha 0.6, 256 x 2048 WikiText2 calibration) to 60.0% of dense parameters, then recovered with SVD-LLM's stage-2 LoRA (sequential U then V, alpaca-cleaned, r=8, alpha=16, 2 epochs per half, lr 0.0001, batch 64, cutoff 256).

This is a research artifact from a study of how SVD compression damages safety behaviour and which component-selection rule best repairs it. It is one cell of a grid over selection rules and budgets; it is not a general-purpose chat model.

Provenance

field value
base (uncompressed) google/gemma-2-9b-it
compression Swift-SVD (dynamic rank allocation, alpha 0.6, 256 x 2048 WikiText2 calibration), 40.00% of parameters removed
resulting parameter fraction 0.5998
seed 42
per-matrix ranks Swift-SVD allocation (compression.json ranks)

Measured

metric value
AdvBench ASR (HarmBench judge) 0.0962
StrongREJECT ASR (HarmBench judge) 0.0863
Macro over-refusal (WildGuard) 0.1115
WikiText-2 perplexity 24.1673

Intended use and limitations

This checkpoint exists to measure safety/utility trade-offs under compression. Several arms in the grid are deliberately safety-degraded relative to gemma-2-9b-it: compression alone raises attack-success rate, and the point of the study is to quantify that and test recovery. Treat any given cell as an experimental subject, not as a deployable assistant, and evaluate it yourself before drawing conclusions from it.

Licence

Gemma Terms of Use. The base model's repository ships no licence file to redistribute; the licence above governs this derivative. Gemma is provided under and subject to the Gemma Terms of Use found at ai.google.dev/gemma/terms; use of this derivative is subject to the Gemma Prohibited Use Policy at ai.google.dev/gemma/prohibited_use_policy.

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