How to Use the Same Prompt in ChatGPT, Claude & Gemini

The multi-model problem

Most AI power users don't live in one app anymore. Claude for writing and code, ChatGPT for general work, Gemini for anything touching Google, Perplexity for research. The models change monthly; your best prompts shouldn't have to.

But every chat app keeps its own history, and none of them share. So the prompt you refined in ChatGPT gets retyped — worse, half-remembered — when you want to try it in Claude. That friction is exactly why people stop experimenting across models.

The fix: keep prompts in a neutral home

Store your prompts in an app that isn't any of the chatbots. Vault: AI Prompt Library keeps each prompt once — titled, tagged, searchable — and hands it to whichever AI app you choose at run time:

1. Open the prompt in Vault.
2. If it's a template, fill in the {{variables}}.
3. Tap run. Vault launches the finished prompt directly in ChatGPT, Claude, Google Gemini, Copilot or Perplexity — the text arrives pre-filled, ready to send.

Prefer a different tool, or using a web UI? One tap copies the completed prompt to your clipboard instead.

Why running one prompt across models makes you better at AI

• You see the model, not the noise. Same input, different outputs — the clearest way to learn what each model is actually good at.
• You de-risk model changes. When a model update shifts behaviour, your prompt library is intact and instantly testable elsewhere.
• You keep the best answer. For anything important — a contract summary, a launch email — a 30-second second opinion from another model is free quality control.

A practical cross-model workflow

1. Save the prompt in Vault with a tag for its job ("email", "code-review", "research").
2. Run it in your default app. Good enough? Done.
3. High-stakes output? Run the same prompt in a second model straight from Vault and pick the winner.
4. Learned something ("Claude needs the word limit stated twice")? Edit the saved prompt once — the improvement is permanent, everywhere.

Because Vault syncs via iCloud, the same library follows you from iPhone to iPad to Mac — whichever device the conversation happens on.