The Leaderboard Is Not a Clinical Clearance
TL;DR for operators A healthcare team choosing a model, configuration, and safeguards for diagnostic support should treat leaderboard leadership as evidence of capability—not proof of clinical readiness. GPT-5-medium led ClinMM-Bench, yet produced a completely correct diagnosis in only 33.88% of cases. The benchmark tests a difficult but essential requirement: combining clinical details and images as evidence unfolds, revising earlier conclusions, and explaining a diagnosis without omitting decisive information or introducing unsupported claims. Medical specialization and explicit reasoning settings do not improve these abilities consistently across model scales, metrics, or specialties. ...