LangSmith
The Agent Engineering Platform
LangSmith is LangChain's framework-agnostic agent engineering platform for observing, evaluating, deploying, and governing AI agents and LLM applications, including tracing, monitoring, evals, deployment infrastructure, Engine, Fleet, Sandboxes, and LLM Gateway capabilities.
Recent stories
LangChain opened Managed Deep Agents in public beta for scaffolding agents with channels, sandboxes, memory, and identity. The agents deploy on LangSmith-managed infrastructure with evals and lifecycle controls.
LangSmith added sandboxed execution, spend-aware gateway routing, and Engine to surface recurring agent failures from traces. The bundle gives teams one place to run agents, control token spend, and turn production issues into debugging and eval loops.
Multiple agent-infra vendors shipped copy-on-write branches, checkpoints, snapshots, forks, or rollback primitives on the same day. That matters because long-running agents can now explore, retry, and recover state without relying only on Git or full sandbox rebuilds.