ChatGPT vs Claude for Tradespeople: Which Actually Helps?
We have spent the last six months testing the major AI tools against the prompts inside the Megaprompt trade bibles — quote writing, hard customer emails, hiring ads, scope-of-work documents, late-payment chases. The same prompt pasted into each tool produces measurably different output. Here is what actually works and where each one falls down.
ChatGPT (OpenAI) — the all-rounder
Strongest: short, friendly customer-facing emails. Quick brainstorms when you do not know how to phrase something difficult. The free tier is generous for everyday use.
Weakest: long, structured documents like detailed scope-of-work or insurance-claim letters. Tends to drift into corporate-speak that does not sound like a tradie wrote it. Often opens with 'Certainly!' or 'Great question!' — both of which the bibles explicitly tell the model to suppress.
Claude (Anthropic) — the careful one
Strongest: long-form work — scope documents, project plans, contracts, multi-section emails. Follows complex instructions closely and is less likely to invent details. The annual price-increase prompt in the Electrician bible reads more naturally out of Claude than out of any other model we tested.
Weakest: short snappy social posts. Often defaults to a more formal tone than you want for, say, a Facebook update about a job you just finished.
Gemini (Google) — the researcher
Strongest: pulling in current information — local council rules, supplier price comparisons, code references. Useful for quoting jobs where you need to check something quickly.
Weakest: long-form drafting. The free tier is also more restrictive than the others on length, which hurts when you are running a structured prompt that expects a full email back.
Which one should you use?
- Quoting a job and writing the email — ChatGPT or Claude. Both work; Claude follows the instructions in the bible more strictly.
- A difficult conversation with a long-term client — Claude. It handles the nuance better.
- Quick social post about a job — ChatGPT.
- Checking a regulation or local rule before quoting — Gemini.
- Hiring ad or rate-card builder — Claude.
The tool matters less than the prompt. A bad prompt in the best AI gets you a vague answer. A good prompt — like the ones in the Megaprompt bibles, where every word has been pressure-tested — works in any of these three. That is why we sell prompt bibles, not AI subscriptions.