Hy4 from @TencentHunyuan is the new #1 open-weights model on APEX-Agents. 77.6% Pass@1 (#3 of 69) 85.1% mean score (#3 of 69) Here’s the updated APEX-Agents open-weights top 5 (Pass@1): 1. Hy4: 77.6% 2. DeepSeek-V4.1-Flash-1017: 69.8% 3. Kimi K3.1 Pro: 65.5% 4. Qwen3.8-Max: 63.3% 5. MiMo V2.6 Flash RL: 57.4% Hy 4 is also the top open-weights model in every APEX-Agents domain: Management Consultant: 85.6% Investment Banking Analyst: 75.3% Corporate Lawyer: 71.9% Congrats to @TencentHunyuan. See the full leaderboard: https://www.mercor.com/apex/