---
title: "Discussion on \"LLM observability pack: free tracing plans for Langfuse, PostHog, LangSmith and more\" | Hashnode"
description: "Discussion on \"LLM observability pack: free tracing plans for Langfuse, PostHog, LangSmith and more\". Once an LLM app or agent leaves your laptop, you need to see what it actually did: which prompts went out, what came back, how long each step took and where it failed. Almost every tracing and eval to"
url: "https://hashnode.com/posts/llm-observability-pack-explained/6af0961a0ae0960e5024c979"
---

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# [LLM observability pack: free tracing plans for Langfuse, PostHog, LangSmith and more](https://perq.hashnode.dev/llm-observability-pack-explained?utm_source=hashnode&utm_medium=feed)

Once an LLM app or agent leaves your laptop, you need to see what it actually did: which prompts went out, what came back, how long each step took and where it failed. Almost every tracing and eval to

1d ago · 4 min read · perq.hashnode.dev  
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-   [#developer-tools](https://hashnode.com/tag/developer-tools)
-   [#observability](https://hashnode.com/tag/observability)

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