Claude Platform adds OpenTelemetry trace export in public beta

Claude Platform can now emit OpenTelemetry traces for calls made through the Messages API, sessions in Managed Agents, and the Claude SDKs. Spans follow the gen_ai semantic conventions and carry token counts, the model name and tool names. By default only that metadata leaves the platform; full prompts and tool results are exported only when a team opts in, which matters for anyone with data handling rules. LangChain announced the same day that these traces flow into LangSmith in public beta, giving step-level views of agent runs without custom instrumentation. The practical change is that Claude agent traffic can land in whatever observability stack a team already runs, next to the rest of its service traces. Both announcements describe the feature as a public beta, so span shapes and attribute names may still change before general availability.