Tencent open-sources Hy3 preview: 295B MoE that bets on agents, not parameter records

Tencent's Hunyuan team just shipped Hy3 preview — a 295B MoE with only 21B active per token, 256K context, SWE-bench Verified 74.4, and a 40% efficiency gain over HY 2.0. The pitch is cheap, fast, agent-ready inference, not a leaderboard crown.