Byte AI Releases: M3

M3

M3: 235B open-source medical LLM claims to beat GPT 5.2 on HealthBench

Byte released M3, a 235B parameter medical LLM fine-tuned from Qwen3 and licensed Apache 2.0. With only 22B active parameters, it is runnable at usable speeds on an M3 Ultra, and it claims to beat GPT 5.2 on HealthBench. Nisten suggested pairing it with smaller imaging models like MedGemma rather than treating them as substitutes.