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LangChain’s $3B Valuation Is a Bet on the Boring Part of AI Agents

A demo agent can look impressive in ten minutes. The difficult questions arrive later: Why did it call that tool? Can we reproduce the failure? What changed after the prompt update? How do we stop it from taking an action that should require approval? Those are not model questions alone. They are e…

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  1. 2026-11-13 16:04 · DEV Community — AI
    LangChain’s $3B Valuation Is a Bet on the Boring Part of AI Agents

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