LangChain · AI

Why the Harness Matters More Than the Model

Eno Reyes, CTO of Factory, breaks down real numbers on code review costs across GPT-5.5, GPT-5.6, and Opus 4.8 to argue that the harness — not just the model — is what drives performance and cost. His take: model labs are stuck testing "on blinders," since they can't pull in other models to see if a different workflow wins. From the Max Agency podcast, hosted by Harrison Chase, Co-Founder and CEO of LangChain. #AICoding #FactoryAI #AIagents #Soft

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