The low hanging fruit on harness engineering is insane.
Ontop of that， there's an interesting area of science/engineering on how to best study the effect of harnesses， from post training through eval/inference. Will be a fairly impactful area （in cost savings per performance）
We implemented the harness with the Responses API and turned on: → Retained reasoning → Context compaction On the public set, GPT-5.6 Sol's score rose 188% whil...