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Cross-family weak-to-weak spoofing on LLM-idio Qwen2-1.5B to Gemma-2B

99.1ASROriginal (target)
-3.13223.40949.9576.491Jun 15, 2026

Evaluation results

MethodLinks
Original (target)Source Model=Qwen2-1.5B, Target Model=Gemma-2B2026.0699.1
GhostPrintSource Model=Qwen2-1.5B, Target Model=Gemma-2B2026.0697.9
5-shot ICLSource Model=Qwen2-1.5B, Target Model=Gemma-2B2026.0619.4
RewritingSource Model=Qwen2-1.5B, Target Model=Gemma-2B2026.068.9
Query DetectionSource Model=Qwen2-1.5B, Target Model=Gemma-2B2026.062.5
Token SuppressionSource Model=Qwen2-1.5B, Target Model=Gemma-2B2026.061
Original (weak)Source Model=Qwen2-1.5B, Target Model=Gemma-2B2026.060.8