Fireworks AI detailed Harvey's proprietary model Tenet, post-trained from Kimi K3 using async RL on Fireworks Training API, doubling LAB Contract all-pass rates from 10.8% to 19.7% at matched cost.

Key Takeaways

  • ✓Achieves SOTA 19.7% on Harvey's LAB Contracts benchmark for long-horizon legal drafting and analysis;
  • ✓Trained via Fireworks Training API async RL pipeline, doubling accuracy without increasing inference cost;
  • ✓Demonstrates the production blueprint for vertical AI leaders building specialized agents on open bases.