Really exciting: Google's MedGemma 1.5 packs 3D radiology, whole-slide pathology, longitudinal X-ray analysis, and clinical document understanding into a single open-weight 4B model (!), with a massive +47% F1 jump in pathology and +11% in MRI classification over v1. The specialized 4B model outperforms Gemini 3.0 Flash on out-of-distribution CT analysis, proving that targeted medical post-training beats raw scale. <3 Samuel Schmidgall (@SRSchmidgall) The MedGemma 1.5 technical report is out 👇 arxiv.org/pdf/2604.05081v1 — https://nitter.net/SRSchmidgall/status/2041973798589903260#m

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