Test the same workflow in ChatGPT and Claude side by side

A Substack creator's Gordon Ramsay-style test found ChatGPT better for punchy Notes and Claude better for long narrative. The fix is not loyalty to one model: duplicate one workflow in both tools, run the same input, compare raw outputs, and commit per content type. The tool used here is ChatGPT. Pricing listed for ChatGPT: Free; Plus $20/mo.

Done with CChatGPT

"Each AI has its lane, and forcing them outside of it is a waste of time."aimaker.substack.com

How do you do it, step by step?

A Substack creator's Gordon Ramsay-style test found ChatGPT better for punchy Notes and Claude better for long narrative.
The fix is not loyalty to one model: duplicate one workflow in both tools, run the same input, compare raw outputs, and commit per content type.
Copy the prompt on this page into ChatGPT and fill in your own details.
Edit the output in your own voice and check any facts before you publish.

Which tool does this use?

ChatGPT. See all ChatGPT use cases or more in Substack.

What does it cost?

Free; Plus $20/mo

What should you watch out for?

Features and prices change. Check the source below before you rely on it, and edit anything AI writes before you publish it.

What prompt should you use with ChatGPT?

Rebuild any prompt with the prompt helper

You are an experienced Substack writer and growth editor.

Context:
- I write for [WHO YOU WRITE FOR] on [YOUR PLATFORM].
- My voice: [YOUR VOICE]
- My goal: [YOUR GOAL]

Task:
I will test one workflow in both tools. Workflow: [DESCRIBE IT]. Input: [PASTE YOUR TEXT HERE]. Tell me how to set it up identically in a Custom GPT and a Claude Project, what to compare in the raw outputs (format fit, voice, edit burden), and a one-line rule for when to use each tool for this workflow. Do not run the workflow yet.

Constraints:
- Avoid [WHAT TO AVOID].
- Use only facts I give you. Don't invent stats, quotes, names or examples. Write [NEEDS DETAIL] wherever something is missing.
- If something above is still in brackets or unclear, ask me about it before you start.

Output format:
Follow the counts and format given in the task. Plain text I can paste straight into [YOUR PLATFORM], numbered if there is more than one item.

Self-check before you answer:
- Did you follow every constraint and the output format?
- Does it sound like my voice and not generic AI writing? Cut filler openers and buzzwords.
- Is every claim backed by something I gave you, or marked [NEEDS DETAIL]?
Fix anything that fails, then give me the result.

Make this prompt yours fill in what you know; the prompt updates as you type

Anything left in [BRACKETS] is for you to fill in, or the AI will ask you. Nothing you type leaves your browser. Want to rebuild a prompt you found elsewhere? Use the prompt helper.

Reverse-engineer a prompt paste a prompt or an output you liked and get a meta-prompt

Your meta-prompt

Paste this into ChatGPT or Claude. It will ask you questions one at a time, then write a prompt tailored to you.

Open ChatGPT ↗

Frequently asked questions

How do I test the same workflow in ChatGPT and Claude side by side?

Which tool do I need for this, and what does it cost?

This use case uses ChatGPT. Pricing listed for it: Free; Plus $20/mo. Check chatgpt.com for current prices.

What prompt can I use?

You are an experienced Substack writer and growth editor. Context: - I write for [WHO YOU WRITE FOR] on [YOUR PLATFORM]. - My voice: [YOUR VOICE] - My goal: [YOUR GOAL] Task: I will test one workflow in both tools. Workflow: [DESCRIBE IT]. Input: [PASTE YOUR TEXT HERE]. Tell me how to set it up identically in a Custom GPT and a Claude Project, what to compare in the raw outputs (format fit, voice, edit burden), and a one-line rule for when to use each tool for this workflow. Do not run the workflow yet. Constraints: - Avoid [WHAT TO AVOID]. - Use only facts I give you. Don't invent stats, quotes, names or examples. Write [NEEDS DETAIL] wherever something is missing. - If something above is still in brackets or unclear, ask me about it before you start. Output format: Follow the counts and format given in the task. Plain text I can paste straight into [YOUR PLATFORM], numbered if there is more than one item. Self-check before you answer: - Did you follow every constraint and the output format? - Does it sound like my voice and not generic AI writing? Cut filler openers and buzzwords. - Is every claim backed by something I gave you, or marked [NEEDS DETAIL]? Fix anything that fails, then give me the result.

What are related use cases?

Put Notes, essays and podcasts on one calendar (Claude)
Keep free and paid Substack prompts in separate templates (Claude)
Each Note needs one atomic insight, not a cut essay (ChatGPT)
Get past the Substack Notes dead zone (Claude)
Run seven tests before you trust 'writes in your voice' (ChatGPT)
First line has to work alone above the fold (ChatGPT)

Where does this come from?

Checked Oct 17, 2026.

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Last updated Oct 17, 2026