Free Tool

AI Prompt Tester

Enter a prompt, pick a platform, and see exactly what the AI says. Optionally enter your brand name to check if it appears in the response. Free — 5 tests per day.

What the prompt tester does

Type the question a customer would ask — "best CRM for a 10-person agency", "is [your brand] worth it?" — pick a platform and see the model's actual answer. Add your brand name and we'll flag whether it was mentioned.

Each platform runs on a current model: ChatGPT uses GPT-4o mini, Claude uses Claude Haiku 4.5, Gemini uses Gemini 2.5 Flash-Lite and Perplexity uses Sonar, which searches the live web and cites sources.

How to write prompts that reveal your AI visibility

Ask like a buyer, not a marketer: "What's the best project management tool for remote teams?" tells you more than "Tell me about [brand]".
Test the whole funnel: Category questions ("best X"), comparisons ("X vs Y") and brand questions ("is X reliable?") surface different gaps.
Compare platforms: Run the same prompt on each model. Perplexity reflects what's ranking on the web today; the others lean more on training data.
Read the reasons: When a competitor is recommended, the reasons the model gives show which claims and sources it trusts.

Frequently asked questions

Are these the same answers users see?

They use the same underlying models via API. Consumer apps add personalisation, memory and their own system prompts, so answers can differ slightly.

Why does the answer change each time?

Language models generate answers probabilistically. That's why serious AI visibility tracking repeats prompts and reports a presence rate rather than a single result.

How many tests can I run?

Five free tests per day without signing up.