Predictive text in Microsoft Copilot: write your prompts faster
Yes, Lightkey works in Microsoft Copilot. Copilot writes the answer, but you still type the prompt. As you write it, Lightkey predicts your next words in grey right where you're typing. Press Tab to accept, or keep typing. It also suggests spelling corrections as you go.
How it works
Install the Lightkey desktop app and open the Copilot app on Windows. Predictions appear in the message box, with nothing to set up in Copilot.
Using Copilot in the browser? Add the Lightkey extension for Chrome or Edge; it works together with the desktop app.
What it helps you write in Copilot
The prompts you give Copilot tend to repeat: the same requests, the same context, the same format. Lightkey learns yours, for example:
“Summarize this email thread and list the decisions.”
“Draft a reply that thanks them and proposes Tuesday.”
“Make this shorter and more direct.”
“Turn these notes into a status update for the team.”
Lightkey also works in ChatGPT, Claude, Gemini and Perplexity.
Your prompts, typed on your device
Lightkey predicts as you type, on your own computer. It doesn't send your prompts anywhere; only Copilot receives what you send it.
Get started
Download Lightkey and start your free 30-day trial.
Install the Lightkey extension for Chrome or Edge if you also work in the browser.
Open Microsoft Teams and start typing. Press Tab to accept a prediction.
Lightkey works in more than 80 languages and in virtually every app on your Windows PC. See all supported apps.
Frequently asked questions
Does Lightkey work in Microsoft Copilot?
Yes. Lightkey works in the Microsoft Copilot app on Windows and, through the Chrome or Edge extension, in Copilot in the browser.
Why use predictive text if Copilot writes for me?
Copilot writes the answer, but you still type the prompt. Lightkey predicts the phrases you repeat in your prompts, so you write them faster and with fewer typos.
Does Lightkey send my prompts anywhere?
No. Lightkey's prediction engine runs on your computer. Only Copilot receives the prompts you send it.
Does Lightkey work in other AI assistants?
Yes, including ChatGPT, Claude, Gemini and Perplexity.
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