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Deep Dive: LangChain 0.3 LCEL and How It Optimizes Claude 3.7 Calls

If you’ve ever watched a Claude 3.7 API call sit in a pending state for 2.1 seconds while your LangChain pipeline serializes prompts, parses outputs, …

deepdivelangchainlcel
Dev.to May 7, 2026, 13:33 UTC

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