MM-VET

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Findings

• IC-116In LLaVA-7B, multi-head attention modules drive hallucination more than MLP modules, and targeted intervention on specific hallucination heads reduces the hallucination rate by up to 1.7x [eval]
• IC-440GPT-4o, Gemini 1.5 Pro, and Claude 3.5 Sonnet show up to 25% skill-level accuracy gaps despite overall accuracies within 0.4% of each other [eval]
• IC-441Skill-level improvements between model releases are highly uneven, with Claude 3.5 Sonnet gaining ~50% over Claude 3 Opus on law skills while Gemini improved most in math and science [eval]
• IC-442Routing each evaluation instance to the model strongest on its relevant skills yields a 3.2% accuracy gain over the best single model, with 3.5-6.8% gains on MMLU Pro [eval]
• IC-443Model inconsistency on probing questions negatively correlates with skill-slice accuracy (r = -0.675), with models contradicting themselves more often on skills where they perform poorly [eval]