AI Agent Harness: The Secret Behind OpenAI’s 6x Cheaper Agents
On August 19, 2026, OpenAI open-sourced the AI agent harness behind Codex-the execution engine that sits between a language model and an actual finished task. In OpenAI’s own benchmark, upgrading this AI agent harness cut output token usage sixfold while roughly tripling a difficult reasoning score. For anyone running an AI-powered tool, or paying for … Read more