DataFunTalk

Aug 17, 2026 · Artificial Intelligence

How the Same GPT‑5.6 Model Jumped from 7.8 to 93.3: The Rise of Agent Harnesses

The Twin paper shows that fixing the base GPT‑5.6 model while swapping different harnesses can boost performance from 7.8 to 93.3, proving that an Agent’s true capability now depends on the combined system of model and harness rather than the model alone.