Text & chat prompt
Plan an A/B test properly
Plan an A/B test properly: a free, copy-paste prompt for ChatGPT, Gemini and Claude. Paste the prompt and replace each [BRACKETED] field with your own details.
The prompt
Help me plan an A/B test on [WHAT I AM TESTING]. Current performance: [BASELINE METRIC] Traffic per week: [VISITORS] Change I want to test: [CHANGE] Write the hypothesis, the primary and guard-rail metrics, the sample size or duration needed, how to split traffic, common mistakes to avoid and how to decide the result.
Pro tip: Decide the success metric and sample size before you look at any results.
How to use this prompt
- Open ChatGPT and start a new chat.
- Paste the prompt.
- Replace each [BRACKETED] field with your real details and paste in your own text where asked.
- Reply with follow-ups such as "make it shorter" or "make it sound more like me".
Prompt at a glance
- Category
- Text & chat
- Works with
- ChatGPT · Gemini · Claude
- Length
- 53 words
- Fields to fill in
- WHAT I AM TESTING, BASELINE METRIC, VISITORS, CHANGE
- Last updated
Frequently asked questions
Which AI tools work with this prompt?
It is written for ChatGPT, Gemini and Claude. Paste it into your preferred tool and adjust the wording if the result is off.
What do I need to fill in?
Replace these fields before you send it: WHAT I AM TESTING, BASELINE METRIC, VISITORS, CHANGE. Each field shows an example in the prompt.
Should I paste private information into the prompt?
Only what the task needs. Remove names, contact details and other sensitive data before pasting a resume or document into any AI tool.
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