LangSmith vs AgentOps (2026)

LangSmith and AgentOps are both observability platforms for LLM applications, but with different specialisations. LangSmith, built by the LangChain team, covers the full spectrum of LLM application observability - tracing chains, prompts, retrievals, and model calls - with a strong focus on evaluation: systematic testing of prompts and chains against labelled datasets before deployment. AgentOps focuses specifically on agent observability, tracking the session-level behaviour of autonomous agents: tool calls, loop iterations, cost per session, and failure patterns. The tools complement each other more than they compete. For teams using LangChain or LangGraph, LangSmith is the natural choice and integrates with near-zero configuration. For teams building custom agent loops with frameworks like AutoGen, CrewAI, or their own implementations, AgentOps provides session-level insight that generic tracing tools miss. In 2026, as more teams move from simple LLM chains to multi-step autonomous agents, the distinction between chain-level and session-level observability becomes practically important. LangSmith tells you what each call in a chain did. AgentOps tells you what an agent session accomplished, where it went wrong, and how much it cost. For production agent systems, using both in tandem is increasingly common.

Feature Comparison