Plain-English Explainer
How to Draft a Reply with Gemini in Gmail
The reply still sounds like you. Gemini just gets you to the first draft faster.
Google Gemini's Ask Gemini tool in Gmail can draft a reply from scratch, clean up one you already wrote, or boil down a long thread before you answer it. This guide covers all three paths, the prompts that get you a usable draft on the first try, and what to check before you hit send.
Google Gemini in Gmail drafts a reply when you click Ask Gemini at the top right of an open email or thread. From there you can ask it to draft a new reply from a prompt describing your answer, summarize a long thread into bullet points before you reply, or refine a draft you already wrote for tone and clarity. Gemini in Gmail requires an eligible Google Workspace or Google AI plan, and it never sends anything on its own: you still review and send.
Published
Key Takeaways
- Open Ask Gemini at the top right of Gmail to draft, refine, or summarize from the email or thread you're currently viewing.
- For a blank reply, describe your actual answer in the prompt. Gemini drafts text, it doesn't know your decision unless you state it.
- On a long or messy thread, ask Gemini to summarize it into bullet points first, so your reply answers the real ask instead of just the last message.
- Already have a draft? Ask Gemini to refine it for tone or clarity instead of starting over from a blank reply.
- Gemini in Gmail needs an eligible Google Workspace or Google AI plan, and it only drafts. You still read and send.
Three ways to get a reply out of Gemini in Gmail
| Approach | Best for | What to still check |
|---|---|---|
| Draft from a prompt | Starting from a blank reply when you already know your answer | That it captured your actual decision, not a generic reply |
| Summarize first, then draft | Long or messy threads where the real ask is buried | That the summary didn't drop a detail the final reply needs |
| Refine an existing draft | You've already written something and want it clearer or warmer | That refining didn't soften or sharpen the point past what you meant |
Copy and Paste
Prompts You Can Use Today
Draft a reply from scratch
Draft a reply to this email letting them know we can move the kickoff call to next week, but only if they send the updated scope doc first. Keep it friendly but direct, and sign off the way I usually do.
Swap in your actual decision. Gemini can't guess the yes or no, the condition, or the deadline for you.
Summarize the thread before replying
Summarize this whole thread into a short list of bullet points: what each person is asking for, what's already been agreed, and what's still open. I want to see the real ask before I write a reply.
Read the summary against the original thread once before you draft off it.
Refine a draft for a warmer tone
Here is a reply I already wrote. Keep the same points and the same decision, but make the tone warmer and less formal, like I'm talking to someone I've worked with for years, not a stranger.
Shorten a drafted reply for clarity
This draft reply is too long and buries the answer. Rewrite it so the decision is in the first sentence, cut anything that repeats what's already in the thread, and keep the rest under a short paragraph.
Draft a polite decline
Draft a reply declining this request. Explain briefly that the timeline doesn't work on our side right now, offer to revisit it next quarter, and thank them for thinking of us, without sounding like a form rejection.
Inside the Panel
What Ask Gemini can actually do with a reply
Google Gemini's Gmail tool covers three separate jobs. Knowing which one you want saves you a round of rewriting.
Draft a new reply
Describe what you want to say and Gemini writes a full reply from that prompt, directly in the email you're replying to.
Refine an existing draft
Write a rough reply first, then ask Gemini to adjust it for tone and clarity without changing what you actually meant.
Summarize the thread
On a long back-and-forth, ask Gemini to synthesize it into bullet points before you draft, so the reply answers what's really being asked.
Getting Started
Where to find Ask Gemini in Gmail
Open Gmail on your computer and look at the top right of the screen: that's where Ask Gemini lives, attached to whatever email or thread you currently have open. Click it and a panel opens next to the message, ready to work with the content already in front of you.
Because the tool reads the email you're viewing, there's no extra step to paste the thread in yourself. If you're replying to a single message, Gemini has just that message. If you're deep in a long thread, it has the whole thing, which matters once you want it to summarize before drafting.
Gemini in Gmail requires an eligible Google Workspace or Google AI plan. If Ask Gemini isn't where you expect it, that's the first thing to check with whoever manages your account's plan, rather than assuming the feature is broken or you're doing something wrong.
Starting From Scratch
Drafting a reply from a prompt
The fastest path is also the one people get the least out of: typing something vague like 'write a reply' and hoping Gemini guesses the point. It can't. A prompt that names your actual decision, the condition attached to it, and who you're talking to will get you a reply close to something you'd send; a vague prompt gets you a generic one you'll end up rewriting anyway.
Treat the prompt like a note to a colleague who's covering your inbox for the day: what's the answer, what's the catch, and what tone fits this particular person. 'Tell them yes, but only if they send the scope doc first' is a different email than 'tell them no, but leave the door open.' Gemini will write either one well, but only if you tell it which one you mean.
A good prompt also tells Gemini who the email is going to, since the right tone for a close teammate is different from the right tone for a client you've never met. If the thread doesn't make that obvious, say it directly: mention whether this is an internal note, a client reply, or a message to someone senior you report to. That one detail changes word choice as much as the yes-or-no answer does.
Once you have a draft, read it the way you'd read anything a colleague wrote on your behalf: check the facts, check the names, and check that the tone matches how you actually talk to this particular person. Then send it yourself. Gemini in Gmail drafts the reply, it doesn't send it.
Long Threads
Summarize a long thread before you draft
The reply that answers the wrong question is the most common failure mode on a thread with several exchanges. By the time multiple people have weighed in, the original ask has usually drifted, and a draft written straight off the latest message can miss what's actually being decided.
Asking Gemini to synthesize the thread into bullet points first gives you a plain list of who asked for what, what's already been agreed, and what's still open, before you write a word of the reply. That short list is also useful on its own, as a quick way to catch up on a thread you've been copied on but haven't fully read.
A summary is also useful when you're not the one replying at all. If you were copied on a long thread and someone asks what's going on, pasting Gemini's bullet list saves you from re-reading dozens of messages, and it gives whoever asked a fast, accurate answer instead of a vague 'let me check.'
Read the summary against the thread once before you draft off it. A summary compresses a conversation, and compression can drop a detail that matters, like a condition mentioned once in the middle of a long message or a date that got buried under later replies.
Fixing a Draft You Already Wrote
Refining an existing draft for tone and clarity
Sometimes you don't want Gemini to write the reply, you want it to fix the one you already wrote. That's the other half of the same drafting capability: give it your rough draft and ask for a specific change, warmer, more formal, shorter, or clearer about the decision, rather than a vague 'make this better.'
Specific requests get specific results. 'Make this warmer' and 'make this sound like I'm talking to a close colleague, not a stranger' will produce different drafts, even though both are asking for warmth. The more precisely you describe the voice you want, the less editing you'll do afterward.
This is also the move for a draft that's technically fine but too long. Asking Gemini to put the decision in the first sentence and trim anything that repeats the thread usually fixes a rambling reply faster than rewriting it by hand.
Before You Send
What to check before you send a Gemini-drafted reply
Gemini in Gmail drafts email and chat responses; it doesn't send them. That review step is where you catch the things an AI draft can get wrong: a name spelled differently than the thread uses, a detail pulled from the wrong message, or a promise the draft makes that you didn't actually intend to make.
Tone is worth a second look too, especially on anything refined for warmth or brevity. A draft that reads fine on its own can land differently once it's sent to a specific person with a specific history, and only you know that context.
None of this requires memorizing special syntax. The three core moves, draft from a prompt, summarize a thread, and refine an existing draft, cover nearly every reply you'll write from Gmail. The skill that compounds over time is writing specific prompts, not discovering some hidden trick inside Ask Gemini.
And remember the plan requirement: Google Gemini's drafting and summarizing features in Gmail need an eligible Google Workspace or Google AI plan. If a colleague on a different plan doesn't see Ask Gemini, that's the likely reason, not a bug.
Turn this into a habit, not a one-off trick
Reading about Ask Gemini and actually reaching for it mid-inbox are different skills. The Gemini first week at work course builds that habit using real email threads, not screenshots, so the prompts above become second nature.
Frequently Asked Questions
How do I open Gemini in Gmail to draft a reply?
Open Gmail on your computer and click Ask Gemini at the top right of the screen. A panel opens next to whatever email or thread you're viewing, and from there you can ask it to draft a new reply, refine one you've written, or summarize the thread first.
Does Gemini send the reply for me?
No. Gemini in Gmail drafts email and chat responses, but it doesn't send anything on its own. You review the draft, make any edits, and send it yourself, the same as you would with a reply you wrote by hand.
What if I already wrote a reply and just want it to sound better?
Ask Gemini to refine the draft instead of writing a new one. Describe the specific change you want, warmer, shorter, more formal, and it will adjust the existing text for tone and clarity while keeping your points intact.
How do I stop Gemini from missing the actual question in a long thread?
Ask it to summarize the thread into bullet points before you draft a reply. That surfaces what each person asked for and what's still open, so your reply answers the real ask instead of just the most recent message.
Why can't I see Ask Gemini in my Gmail?
This feature requires an eligible Google Workspace or Google AI plan. If Ask Gemini isn't showing up at the top right of your Gmail, check with whoever manages your account's plan before assuming something is broken.
Can Gemini draft chat responses too, not just email?
Yes. Gemini in Gmail can draft both email replies and chat responses, using the same Ask Gemini entry point. The approach is the same either way: describe what you want to say, or ask it to refine or summarize first.
What should I double-check before sending a Gemini-drafted reply?
Read it the way you'd check a draft from a colleague: confirm names, details, and any commitments it makes are correct, and make sure the tone fits the specific person you're sending it to. Gemini drafts the reply; you're still responsible for what goes out.
Does a vague prompt still produce a usable draft?
Sometimes, but a specific prompt works far better. Naming your actual decision, any condition attached to it, and the tone you want gets you a draft close to something you'd send; a vague prompt like 'write a reply' usually needs a full rewrite.
Can I use Gemini to draft a reply on someone else's behalf, like a shared inbox?
Gemini in Gmail works from whatever email or thread you have open, so if you have access to a shared inbox, the same drafting and summarizing options are available there. Always check your organization's naming and signature conventions before sending, since a shared inbox often has its own voice separate from your personal one.
Your inbox is the easiest place to start
One thread, one draft, one rewrite, and you'll feel the difference.