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How do you decide when to use frontier vs open weight models in production AI workflows?

I’ve been thinking about model choice as “which model is best?” over as a routing problem. For each job in a workflow, I’d score: reasoning difficulty cost of a wrong answer data sensitivity expected volume / cost ceiling Then route differently: - open weight or fine tuned model for high volume low…

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  1. 2026-09-18 08:52 · r/AI_Agents
    How do you decide when to use frontier vs open weight models in production AI workflows?

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