How to send one prompt to several AIs and compare the answers

When a decision matters or an answer doesn't feel right, asking more than one AI is a good check. Each has its own strengths and habits, and comparing them surfaces what one of them missed.

The manual way

Copy your question, open each AI in its own tab, paste, send. Fine for two; tedious for three or four.

Keep the question word-for-word identical. If the wording changes, you can't tell whether a difference comes from the AI or from how you asked.

Send once, read side by side

In Qarta, a Chrome extension, you pick the AIs you want and send once: each one opens in its own tab with exactly the same prompt, and the answers then read side by side on a single screen.

This is a Pro feature, and you can try it once on the free plan.

Questions worth asking more than one AI

Contract review checklists, gaps in a project plan, design trade-offs — anything without a single right answer, where the number of angles matters more than speed.