Tencent Hy3 Preview Ships as Open Source — 295B MoE With 21B Active Parameters Built in Under 3 Months From Cold Start

HuggingFace·medium signal

Tencent open-sourced Hy3 Preview on April 23, a 295B-parameter Mixture-of-Experts model with 21B active parameters and 256K context. Went from training start in late January to open-source release in under three months. Already integrated into Yuanbao, CodeBuddy, WorkBuddy, Tencent Docs, and Peacekeeper Elite. Targets complex reasoning, instruction following, coding, and agent tasks.