AI article
The Same Model, Three Agents: Why the Harness — Not the Model — Decides What Your AI Can Do
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Dev.to | Oct 5, 2026 | Daniel Sam Pete Thiyagu
Automated excerpt
The model proposes, the harness executes. Concretely, a harness has seven jobs: The agent loop. References: Harness-Bench: Measuring Harness Effects across Models in Realistic Agent Workflows (arXiv 2605. 27922, May 2026, Peking University / Qiyuan Tech) · Same Model, Different Harness: Different Coding-Agent Results (arXiv 2608. 26218, Aug 2026) · Self-Harness (arXiv, reported via VentureBeat, Sep 2026) · OpenAI Agents API public beta (announced Sep 10, 2026; Codex harness open-sourced Apache 2.
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