LangSmith Trace Visualization
LangChain's observability platform — distributed tracing, dataset curation, evaluation suites, and the prompt playground, for LangChain and framework-agnostic apps alike.
See: LangSmith Trace Visualization
The architecture as diagrams, so you can hold the whole system in your head.
Reading LangSmith is free. Pro unlocks the other four modes on all AI Observability & Evals topics, so you can go from understanding it to building it.
- SeeThe architecture as diagrams, so you can hold the whole system in your head.
- AnimateStep through the flow one stage at a time and watch the data move.
- TestScenario questions with explanations that show exactly where your model of it breaks.
- BuildA guided implementation with code you can run and adapt for production.
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All AI Observability articles →LLM Evaluation Frameworks Compared
Promptfoo, DeepEval, RAGAS, LangSmith and Phoenix compared by what each is good at, with working examples and a way to choose.
Offline Evals: The Regression Suite for LLM Features
Build an evaluation dataset from real use, pick the cheapest grader that works, measure the noise floor, and turn the suite into a release gate.
Token Tracking and Cost Management
Monitor token usage and costs — per-request tracking, budgets, cost allocation across teams, and the optimization strategies that shrink the bill.
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