---
title: "Discussion on \"Prompt Versioning and Cost Control: Running LLMs Responsibly in Production\" | Hashnode"
description: "Discussion on \"Prompt Versioning and Cost Control: Running LLMs Responsibly in Production\". The monthly bill was ten times the estimate.\nInvestigation took two hours. Three things were wrong.\nA retry loop was calling the model on every validation error — including schema mismatches that woul"
url: "https://hashnode.com/posts/prompt-versioning-and-cost-control-running-llms-responsibly-in-production/6abb5cffc6bcb11b5cd24bda"
---

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[Madhav Bhasin](https://hashnode.com/@madhavbhasin)

Production patterns for backend engineers who are tired of hello-world tutorials.

Sep 29

# [Prompt Versioning and Cost Control: Running LLMs Responsibly in Production](https://blog.madhav.dev/prompt-versioning-and-cost-control-running-llms-responsibly-in-production?utm_source=hashnode&utm_medium=feed)

The monthly bill was ten times the estimate. Investigation took two hours. Three things were wrong. A retry loop was calling the model on every validation error — including schema mismatches that woul

blog.madhav.dev 6 min read

[#openai](https://hashnode.com/tag/openai) [#llm](https://hashnode.com/tag/llm) [#python](https://hashnode.com/tag/python) [#fastapi](https://hashnode.com/tag/fastapi) [#prompt-engineering](https://hashnode.com/tag/prompt-engineering) [#promptengineering](https://hashnode.com/tag/promptengineering) [#cost-control](https://hashnode.com/tag/cost-control) [#production](https://hashnode.com/tag/production)

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