LangSmith and LangGraph Platform

LangGraph Platform is a purpose-built infrastructure and management layer for deploying and scaling long-running, stateful agents -- offering:

• 1-click deployment to go live in minutes,
• 30 API endpoints for designing custom user experiences that fit any interaction pattern
• Horizontal scaling to handle bursty, long-running traffic
• A persistence layer to support memory, conversational history, and async collaboration with human-in-the-loop or multi-agent workflows
• Native LangGraph Studio, the agent IDE, for easy debugging, visibility, and iteration.

LangSmith is a unified observability & evals platform where teams can debug, test, and monitor AI app performance - whether building with LangChain or not.

Find failures fast with agent observability. Quickly debug and understand non-deterministic LLM app behavior with tracing. See what your agent is doing step by step, then fix issues to improve latency and response quality.

Evaluate your agent's performance. Evaluate your app by saving production traces to datasets, then score performance with LLM-as-Judge evaluators. Gather human feedback from subject-matter experts to assess response relevance, correctness, harmfulness, and other criteria.

Experiment with models and prompts in the Playground, and compare outputs across different prompt versions. Any teammate can use the Prompt Canvas UI to directly recommend and improve prompts.

Track business-critical metrics like costs, latency, and response quality with live dashboards, then get alerted when problems arise and drill into root cause.