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Dictionary

LLM Observability

Tracing every prompt, tool call, and token in production.

1 min readupdated 2026-07-04

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LLM observability (Langfuse, LangSmith, Helicone, Arize) captures inputs, outputs, latency, cost, and errors per call. Non-negotiable once you have real users. Tracing every prompt, tool call, and token in production.

Tracing every prompt, tool call, and token in production. LLM observability (Langfuse, LangSmith, Helicone, Arize) captures inputs, outputs, latency, cost, and errors per call. Non-negotiable once you have real users. In practice: A trace shows the exact chunks retrieved, the prompt sent, and the answer scored by an LLM-judge. This dictionary node is part of the Onexial knowledge graph and links to related concepts, workflows and tools below.
Definition
LLM observability (Langfuse, LangSmith, Helicone, Arize) captures inputs, outputs, latency, cost, and errors per call. Non-negotiable once you have real users.
Example
A trace shows the exact chunks retrieved, the prompt sent, and the answer scored by an LLM-judge.
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What is LLM Observability?

LLM observability (Langfuse, LangSmith, Helicone, Arize) captures inputs, outputs, latency, cost, and errors per call. Non-negotiable once you have real users.

What is an example of LLM Observability?

A trace shows the exact chunks retrieved, the prompt sent, and the answer scored by an LLM-judge.

Why does LLM Observability matter for AI and automation?

Tracing every prompt, tool call, and token in production. It connects to the workflows, prompts and tool stacks linked on this page, so you can move from definition to execution without leaving Onexial.

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Related concepts

The vocabulary this page depends on.

  • Guardrails

    Runtime checks that constrain LLM inputs and outputs to keep behavior safe and on-spec.

  • AI Evals

    Reproducible test suites that measure LLM output quality across model, prompt and code changes.

  • Prompt Versioning

    Treating prompts as code: tracked, diffed, rollback-able.

  • Automation Observability

    Monitoring inputs, model calls, outputs, cost, latency, and failures across AI workflows.

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Related workflows

Turn this into a repeatable process.

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Related tool stacks

The tools that run it in production.

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Related prompts

Reusable prompts for this job.

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Comparisons & alternatives

Pick between the options.

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