Baichuan AI (百川智能) is a leading Chinese AI company in 2026, founded by Wang Xiaochuan, specializing in open-source and commercial large language models (Baichuan series). Flagship includes Baichuan4-Turbo/Air for enterprise optimization, multimodal capabilities, and top-performing medical models (Baichuan-M3 235B, world's strongest open medical LLM surpassing GPT-5.2 in benchmarks). Offers low-cost API (from 0.98厘/千token), free open-source downloads, strong Chinese performance (SuperCLUE #1), and medical/finance specializations—ideal for developers, enterprises, and healthcare.