Do Mixed-Vendor Multi-Agent LLMs Improve Clinical Diagnosis?

Research shows that multi-agent LLM systems using models from different vendors (o4-mini, Gemini-2.5-Pro, Claude-4.5-Sonnet) significantly outperform single-vendor teams in clinical diagnosis tasks. Mixed-vendor configurations achieve superior recall and accuracy by combining complementary strengths and reducing shared biases that affect homogeneous model teams.