LangChain Agent Tops Terminal Bench via Harness Engineering

What Changed

Coding agent jumped from Top 30 to Top 5 on Terminal Bench 2.0

Why It Matters

Demonstrates harness tweaks can massively improve agent benchmarks without retraining, saving time and costs for developers. Highlights non-model factors in agent success.

What To Do Next

Add self-verification loops to your LangChain agents and test on Terminal Bench 2.0.