Debugging LLM Hallucinations: Tracing Tools Compared

When an LLM gives a wrong answer, developers need the full trace of that request to find the root cause. The article compares six tracing tools—Helicone, LangSmith, Langfuse, Future AGI, Braintrust, and others—on speed of setup, granularity, and OpenTelemetry compatibility. OpenTelemetry-native tools allow LLM spans to sit in the same trace as other services, avoiding manual timeline stitching.