I built a Python module to A/B test prompts inside Claude Code, and you can run it on yours

📰 Dev.to · Frank Brsrk

Learn how to A/B test prompts inside Claude Code using a Python module and improve your AI model's performance

intermediate Published 23 Apr 2026

Action Steps

Install the Python module using pip
Import the module and initialize the A/B testing framework
Define the baseline and treatment prompts for comparison
Run the A/B test using the module's API
Analyze the results and refine the prompts for better performance

Who Needs to Know This

Data scientists and AI engineers can benefit from this module to optimize their models and compare results

Key Insight

💡 A/B testing prompts can significantly improve the performance of AI models by identifying the most effective language inputs

Key Takeaways

Learn how to A/B test prompts inside Claude Code using a Python module and improve your AI model's performance

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Title: I built a Python module to A/B test prompts inside Claude Code, and you can run it on yours

URL Source: https://dev.to/frank_brsrk/i-built-a-python-module-to-ab-test-prompts-inside-claude-code-and-you-can-run-it-on-yours-5c6f

Published Time: 2026-04-23T10:29:33Z

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# I built a Python module to A/B test prompts inside Claude Code, and you can run it on yours - DEV Community
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[Frank Brsrk](https://dev.to/frank_brsrk)
Posted on Apr 23

# I built a Python module to A/B test prompts inside Claude Code, and you can run it on yours

[#ai](https://dev.to/t/ai)[#python](https://dev.to/t/python)[#agents](https://dev.to/t/agents)[#llm](https://dev.to/t/llm)

Same model. Same prompt. Baseline tells the patient to eat healthier. With an Ejentum reasoning scaffold injected, the agent asks for a thyroid panel.

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I built a Python module to A/B test prompts inside Claude Code, and you can run it on yours

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