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A cheaper model with a better harness just beat the stronger one

This story is from 2026-10-29. It is preserved in the archive; the latest stories are on the live feed.

Google Cloud AI Research's Harness² keeps the model frozen and rewrites everything around it: system prompt, guardrails, memory, tool guidance, subagents, skills, scripts and plugins. The loop proposes two edited harnesses, runs them against the current one on the same task with the same model, and…

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  1. 2026-10-29 09:15 · DEV Community — AI
    A cheaper model with a better harness just beat the stronger one

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