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LLM & AI Agent Applications with LangChain and LangGraph — Part 18: Trajectory Evaluator
Last Updated on January 2, 2026 by Editorial Team Author(s): Michalzarnecki Originally published on Towards AI. Hi! The next evaluation technique we’ll discuss in this part is the Trajectory Evaluator. This tool doesn’t look only at the final answer produced by the model. Instead, it focuses on the entire reasoning process — step by step. Trajectory Evaluator helps us judge whether the model reached the result in a correct way, or whether it mad…
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LLM & AI Agent Applications with LangChain and LangGraph — Part 18: Trajectory Evaluator
Last Updated on January 2, 2026 by Editorial Team Author(s): Michalzarnecki Originally published on Towards AI. Hi! The next evaluation technique we’ll discuss in this part is the Trajectory Evaluator. This tool doesn’t look only at the final answer produced by the model. Instead, it focuses on the entire reasoning process — step by step. Trajectory Evaluator helps us judge whether the model reached the result in a correct way, or whether it mad…
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