ChatGPT writes a draft when you ask it in a chat. Typeahead suggests the rest of your sentence as you type, in the app you’re in.
Or use both: ChatGPT when you need ideas, Typeahead when you write the email.
The same email at the same typing speed: asked of ChatGPT, or written in place.
Asking ChatGPT: you write a prompt with the facts, wait while it thinks, read back a long email in its words, ask for it shorter and more personal, then select the email and copy it out to paste where it's going.
With Typeahead, in Notes: you type each thought and Typeahead suggests the rest of the phrase in grey. Tab takes it, the right arrow takes one word, and typing something else steers it. The same email, written in place.
What each one does, from OpenAI’s own help and pricing pages.
| Feature | Typeahead | ChatGPT |
|---|---|---|
| Finishes your sentence as you type, across your Mac apps | Yes | No |
| Suggestions generated on your Mac | Yes | No |
| Never sends your writing to a server | Yes | No |
| AI suggestions work offline after setup | Yes | No |
| No account required | Yes | Browser only |
| Buy-once option | Yes | No |
Competitor details come from each company's own website (help, product, pricing and privacy pages), checked September 28, 2026.
Typeahead reads the window you’re typing in, so a reply picks up the names and times already on screen.
An AI model runs on your Mac, picked for it or chosen by you. Typeahead never sends your writing to a server.
ChatGPT’s paid plans are priced per user per month. Typeahead is $149 once, or $10 a month.ChatGPT’s paid plans are priced per user per month. Typeahead is £109 once, or £8 a month.ChatGPT’s paid plans are priced per user per month. Typeahead is €129 once, or €9 a month.ChatGPT’s paid plans are priced per user per month. Typeahead is CA$209 once, or CA$14 a month.ChatGPT’s paid plans are priced per user per month. Typeahead is A$209 once, or A$14 a month.
Free for 14 days, then $96 a year£72 a year€84 a yearCA$132 a yearA$132 a year.Billed $96 a year£72 a year€84 a yearCA$132 a yearA$132 a year.
One payment, every update.
Special offerChatGPT writes for you: you describe what you need in a chat, it drafts, and you copy the result to where it’s going. Typeahead writes with you: as you type in Mail, Slack, Notion or your browser, it suggests the rest of your sentence in grey at your cursor, and Tab takes it. The words stay yours, and the suggestions come from an AI model on your Mac.
For the everyday ones, often yes. Replies, follow-ups and quick updates are often quicker to write yourself with the end of each sentence suggested than to prompt, wait and paste. For a long first draft from a few notes, or ideas when you’re stuck, ChatGPT is the better tool, and you can use both.
Partly. Since July 2026, ChatGPT’s desktop app can act in your apps when you give it a task: Computer Use clicks and types for you. It still starts from a prompt, and you review what it did. Typeahead isn’t something you ask. It suggests the rest of your sentence as you type, in Mac apps with a standard text field, and you stay the author.
No, and that’s on purpose. Typeahead finishes sentences you start, from a word or two to a full sentence or more, depending on the length you pick. You stay the author: keep typing to steer a suggestion or ignore it, and Tab only when it says what you meant.
No. Suggestions are made by a model on your Mac, and Typeahead never sends your writing to a server. Its only network activity is license activation, a license check each time the app starts, optional update checks, and the one-time download of your AI model.
No. A license key turns Typeahead on, and there’s nothing to sign in to. OpenAI’s help center says the ChatGPT app for Mac asks you to sign in; signed out, ChatGPT works only on the web.
Not unless you want it to be. $149 once and it's yours to keep, or $96 a year, or $10 a month. Cancel any time and it keeps working until the time you've paid for runs out. Every plan gets every update.Not unless you want it to be. £109 once and it's yours to keep, or £72 a year, or £8 a month. Cancel any time and it keeps working until the time you've paid for runs out. Every plan gets every update.Not unless you want it to be. €129 once and it's yours to keep, or €84 a year, or €9 a month. Cancel any time and it keeps working until the time you've paid for runs out. Every plan gets every update.Not unless you want it to be. CA$209 once and it's yours to keep, or CA$132 a year, or CA$14 a month. Cancel any time and it keeps working until the time you've paid for runs out. Every plan gets every update.Not unless you want it to be. A$209 once and it's yours to keep, or A$132 a year, or A$14 a month. Cancel any time and it keeps working until the time you've paid for runs out. Every plan gets every update.
Checks what you wrote vs helps you write it.
Inbox replies, finished as you type.
Suggestions that fit what's in the window.
Slack: Dana writes “My train gets in at 6:40.” In the reply, “I’ll be there at” gets the suggestion “6:40 sharp 👍”, the time taken from her message and marked in blue. The suggestion is taken and the reply reads “I’ll be there at 6:40 sharp 👍”.
Slack: Dana writes “My train gets in at 6:40.” In the reply, “I’ll be there at” gets the suggestion “6:40 sharp 👍”, the time taken from her message and marked in blue. The suggestion is taken and the reply reads “I’ll be there at 6:40 sharp 👍”.
