TLDR Tech / AI
Training frontier knowledge work agents: A 397B RL training guide with SkyRL
Mercor and SkyRL post-trained Qwen3.5-397B-A17B on 1,928 expert knowledge-work tasks, lifting APEX-Agents Pass@1 by 70%. The recipe shows that robust environments, exact token accounting, async RL, and harness design matter as much as algorithm choice at frontier scale.
Read the full story