Harness Optimization Doubles Qwen's SWE-bench Performance

A new study shows that harness configuration, not just the model, drives coding agent performance. By compressing old tool outputs and handling stuck behavior instead of keeping full history, Qwen solved twice as many SWE-bench tasks under a 20k token limit.

2026-08-31 ~ 2026-08-31 · 2 related posts

• Same Model, Different Harness: Coding-agent results vary by context policy — rohanpaul_ai · 2026-08-31
• Harness optimization doubles Qwen solutions on SWE-bench — rohanpaul_ai · 2026-08-31