How to Manage Prompts Across ChatGPT, Claude, and Gemini

Every AI app has its own place for instructions you reuse, and they mostly stay where you made them:

• ChatGPT: custom instructions for every chat, Projects with their own instructions and files, and GPTs.
• Claude: Instructions for Claude, project instructions and skills.
• Gemini: Instructions for Gemini, and Gems, which Google is replacing with skills. On personal accounts, Gems go away starting in November 2026 and are recreated as skills.

These do their own job well: they tell one app who you are and how one project works. They are a poor home for the prompts themselves. Most of what you build in one app cannot be opened in another; skills are the exception, since Claude and Gemini can both take them as files. And the change from Gems to skills shows that a vendor can rebuild a feature while your work is in it.

Each app has a guide of its own on what it keeps and how to save a prompt there: ChatGPT, Claude, Gemini, Perplexity, Grok.

Leave in the app what is about you or about one project: your role, how you like answers, the files a project needs. Each app’s own instructions hold that well.

Put in the library what starts a piece of work: “Summarize this transcript into decisions and owners”, “Review this function for edge cases”, a description for an image tool. The test is short. If you would type it again in a different app, it belongs in the library.

PromptTray works in 22 apps, and the kind of app matters more than who makes it:

• Chat: ChatGPT, Claude, Gemini, Perplexity, Grok, AI Studio, DeepSeek, Copilot, Meta AI, Mistral.
• Images, video and music: Ideogram, Krea, Higgsfield, Leonardo, Runway, Kling, Suno, Magnific.
• App builders: Lovable, v0, Bolt, Replit.

A chat prompt moves between ChatGPT, Claude and Gemini almost unchanged. A prompt for an image or a video tool is a description and not an instruction: subject, light, lens, mood. A prompt for an app builder is a short spec: what to build, with what, within which limits.

So file prompts by the kind of work and tag the medium. A folder per vendor gives you the same prompt three times. The guide to organizing AI prompts has the whole system.

A prompt travels well when it says what it needs in plain words: the context, the task, the limits, the shape of the answer. It travels badly when it leans on one app’s features, such as a tool or a mode that only exists there.

Where the wording has to differ, do not keep two prompts. Mark the difference as a variable, for example {format} or {length}, and fill it in when you insert the prompt. Before you save a prompt for good, run it in two of the apps you use. If both answers are usable, it is portable.

With PromptTray the library is a panel beside the chat, and it is the same panel in every supported app. A Save button appears in the message box as soon as you type, so a prompt you have just written in Claude can be in the library before you send it.

To use a prompt, press CtrlShiftKControl Shift K in any of the apps. Spotlight opens over the page and searches titles, categories, tags and the text of your prompts, and Enter puts the one you pick in the message box. Opened with nothing typed, it lists your favorites and, when the chat gives it something to go on, suggests prompts for it.

PromptTray does not need an account: prompts are saved in your browser. Sign in and they sync, so the library follows you to another browser, and you can read it on prompttray.app as well. Sync is part of the free plan.

The library is not a new place to get stuck either. Settings exports your prompts as one JSON file, and the Import Hub reads that file back in, along with pasted text and .md, .txt and .csv files.

1. Collect what you have. Paste your prompt doc or your notes into the Import Hub, or upload the file. It splits the text into prompts and flags the ones already saved.
2. Review before you save. Give each prompt a title that starts with a verb, and delete what you would not use again.
3. Catch the ones that live in chats. When an AI wrote a prompt for you, PromptTray can scan the replies in that conversation, pick the prompts out and show them to you before anything is saved.
4. Use the library for a week in every app you work in, then prune it.

If most of your prompts live in ChatGPT today, start with how to save prompts in ChatGPT.