Muse vs ChatGPT vs Lucie

Three ways to get help from AI, side by side.

The short answer

Muse is a personal agent for errands. ChatGPT is a general AI assistant, mostly used for writing, research and work. Lucie is a personal AI for your whole life.

ChatGPT is the stronger all-rounder. It is better for writing, research and thinking things through, and paid plans add an agent that can browse and fill in forms.

Muse, Meta’s personal agent, is built to run errands for you. It works on its own cloud computer, keeps going after you close the app, and lives in WhatsApp. It is US only and free to start, with paid plans at $20 and $100 a month.

Lucie is a personal assistant that researches, drafts, plans and books, with your approval. Its proactive support connects your calendar, email and health to spot what matters and help at the right moment.

Sources · How we compared

How Muse, ChatGPT and Lucie compare

Muse, ChatGPT and Lucie compared
	Muse	ChatGPT	Lucie
Type of product	Personal agent for errands	General AI assistant for writing, research and work	Personal AI for your whole life
Questions and research	Yes	Yes	Yes
Everyday requests	Yes	Yes	Yes
Email and calendar	Via integration	Via integration	Yes
Connected apps	Via integration	Via integration	Via integration
Multi-step tasks	Requires approval	Requires approval	Requires approval
What it is	A personal AI agent from Meta that runs errands on its own cloud computer	OpenAI’s general AI assistant, with an agent mode for tasks	A personal AI assistant that gets things done and helps before you ask
How you use it	Chat in the Muse app or in WhatsApp	Chat or voice; agent mode for tasks	Chat or talk in the Lucie app
Writing and research	YesCan write too, though its focus is errands	YesIts biggest strength: writing, explaining, summarising, research	YesDrafts, documents and web comparisons; not built for deep research
What it does best	Multi-step errands: email, travel, shopping, forms. Keeps going after you close the app	Questions, writing, research and documents; supervised browser tasks on paid plans	Email, calendar, research, follow-ups and bookings, connected to your health and goals
Before it acts	Requires approvalBy default it asks before important actions like sending email or buying. You can change this	Requires approvalAgent pauses for your confirmation on high-impact actions	Requires approvalNothing is sent, booked or bought until you confirm
Proactive help	YesWorks in the background on goals you give it and pings you when it needs you	LimitedMostly answers when you ask; you can schedule tasks to run later	YesProactive support reads your calendar, inbox, health and memory, and speaks up only when something matters
Personal memory	YesRemembers useful details, per press	YesMemory across chats, which you can manage	YesRemembers what matters; review, edit or remove anything
Connects to	Via integrationGmail and other email, calendar, WhatsApp, Instagram, Facebook, Threads, Apple Health	Via integrationGmail, Google Calendar, Drive, Slack and more through apps; Apple Health in the US	Via integrationGmail, Outlook, iCloud, Google Calendar, Apple Health, Oura, WHOOP, Garmin and more
What users report on X	Users praise shopping and bill savings. Complaints: robot checks, slow tasks, a reported chat leak	Works for ordering and unsubscribing. Complaints: slow, buggy browsing	Our own product, so we left it out of this row. It is only on iPhone and Mac
Where it works	Mobile, Mac and WhatsApp	Web, desktop and mobile	iPhone and Mac
Who can get it	LimitedUS only, adults 18+. Card needed at sign-up	YesWidely available; agent mode on paid plans; Health in the US	YesOn the App Store and for Mac
Price	Free with usage limits; Power $20/mo; Maximum $100/mo	Free; Go $8/mo; Plus $20/mo; Pro from $100/mo	7-day trial, then a subscription

How Muse, ChatGPT and Lucie differ

01Assistant or agent?

Muse

An agent that works on its own cloud computer

ChatGPT

An assistant first, with agent mode on paid plans

Lucie

Both: you talk to it, and it acts with your OK

02Best for writing and research?

Muse

It can write, but it is built for errands

ChatGPT

Its biggest strength

Lucie

Good for everyday drafts; not for deep research

03Best for errands?

Muse

Built for them; asks before buying by default

ChatGPT

Agent mode browses and fills in forms, with confirmations

Lucie

Books, buys and drafts, always after your yes

04Where does it live?

Muse

Muse app on phone and Mac, and WhatsApp

ChatGPT

Web, desktop and mobile

Lucie

iPhone and Mac, with the same memories

Reactive or proactive?

Most AI waits for you to ask, Lucie helps before you need to.

Muse

Yes

Works in the background on goals you give it and pings you when it needs you

ChatGPT

Limited

Mostly answers when you ask; you can schedule tasks to run later

Lucie

Yes

Proactive support reads your calendar, inbox, health and memory, and speaks up only when something matters

Illustrative example

Leo’s schoolFriday pick-up moves to 14:00

Calendar

Friday 14:00Client call with Ana

Sleep

Recovery 48%Short night before a busy day

Proactive supportReads the context.
Finds what matters.

Lucie suggests

Leo’s pick-up moved to 14:00 on Friday, the same time as your call with Ana. Move the call to 15:30?

Not nowMove call

Nothing changes until you tap.

An important meeting tomorrow: it helps you prepare
An email that needs a reply: it drafts one for you
A restaurant that’s fully booked: it watches in the background and tells you when a table opens, even on another date
A friend’s birthday coming up: it suggests a gift and can order it with your OK
A request nobody answered: it follows up
A refund or insurance claim you’re owed: it spots it in your email and helps you claim it

Reactive AI answers.
Lucie’s proactive support looks ahead.

Proactive support connects your email, calendar and sleep.

Illustrative example

Board meeting · tomorrow 09:004 people · 1 hour

Last thread with Tom: budget sign-off
Deck shared Monday, not opened yet
Open question: hiring plan

Your board meeting is tomorrow at 9. I pulled the last thread with Tom and the open questions. Want a one-page brief?

Ready for tomorrow’s meeting, without asking.

The evening before a big meeting, Lucie pulls the last thread, the open questions and the files you haven’t opened, and offers a short brief.

See how Lucie helps organise your day

Illustrative example

What Lucie remembers

Prefers runs in the morningFrom your chats
Sam’s birthday is 14 JuneYou told me
Vegetarian on weekdaysImported from ChatGPT

Bring what your old AI knew.

Import a ChatGPT export into Lucie’s memory, then review, edit or remove anything it keeps.

How Lucie’s memory works

Muse, ChatGPT and Lucie, feature by feature

Feature comparison including Lucie
	Muse	ChatGPT	Lucie
Type of product	Personal agent for errands	General AI assistant for writing, research and work	Personal AI for your whole life
Writing and research	YesYes	YesExcellent	YesDrafts, documents, and web comparisons with a link to each option
Email	Via integrationGmail and other email; asks before sending by default	Via integrationReads Gmail through a connector	YesGmail, iCloud Mail and Outlook: inbox overview, drafts and follow-ups. You send
Calendar	Via integrationConnects to calendar	Via integrationReads Google Calendar through a connector	YesGoogle, iCloud and Outlook calendars. Morning briefing and day-ahead plan
Taking actions	Requires approvalErrands on a cloud computer; asks before important actions by default	Requires approvalAgent mode on paid plans; asks before important steps	Requires approvalBooks tables, buys tickets, places orders, drafts replies and works on your Mac. Only after you confirm
Background agents	YesOne agent with its own cloud computer	LimitedAgent mode for one task at a time, on paid plans	YesMany agents that work on your goals in the background
Proactive help	YesWorks in the background on goals you give it and pings you when it needs you	LimitedMostly answers when you ask; you can schedule tasks to run later	YesProactive support reads your calendar, inbox, health and memory, and speaks up only when something matters
Personal memory	YesYes, per press	YesYes, manageable	YesRemembers what matters. You can review, edit or remove it, and import a ChatGPT export
Sleep insights	LimitedCan read Apple Health; dedicated sleep features not confirmed	LimitedChatGPT Health can read Apple Health (US, 18+)	YesSleep duration, stages and history, with patterns you can ask about
Workout support	Not currently supported	Not currently supported	YesWorkouts and a weekly plan around your recovery
Meal tracking	Not currently supported	Not currently supported	YesSend a photo of a meal for calories and macros, linked to your day
Breathwork and meditation	Not currently supported	Not currently supported	YesGuided breathing and meditation in the app
Focus and app blocking	Not currently supported	Not currently supported	YesFocus sessions, app and website blocking, daily allowances. Within iOS and macOS limits
Wearables	LimitedApple Health only	LimitedApple Health only, in the US	Via integrationApple Health, Oura, WHOOP, Garmin, Polar, Suunto, Fitbit, Google Health Connect
Platforms	Mobile, Mac, WhatsApp	Web, desktop, mobile	iPhone (iOS 18+) and Mac (macOS 14+, Apple silicon)

Who benefits from knowing so much about you?

Privacy and data, side by side
	Muse	ChatGPT	Lucie
Is advertising part of the business?	Meta is ad-funded. Muse chats and cloud-computer data are not shared with Meta’s ad systems, per Meta	YesAds on Free and Go since February 2026, starting in the US. None on Plus or Pro	NoNo ads, and it never sells your data. Paid by subscription
Can your chats train its models?	YesOn by default when you start using Muse, per its privacy page	YesOn by default on Free, Go, Plus and Pro. Health data is not used	NoNo. Lucie does not train on your chats
Can you opt out of training?	YesYes, under Settings > Data controls	YesSettings > Data controls, or Temporary Chat	Nothing to opt out of. You also choose what to connect and can disconnect any source
Can you delete your data?	YesDelete messages and files, ask it to forget, or reset Muse	YesDelete chats, memories or your whole account	YesEdit or remove memories; request deletion of your account and data
What does it connect to?	Email, calendar, Meta apps, Apple Health; a browser on its cloud computer	Gmail, Google Calendar, Drive, Slack and other apps; Apple Health in the US	Mail, calendars, contacts, tasks, wearables and Screen Time, each with its own permission
Where is data stored?	A dedicated cloud computer per user. Country not published	The US and other countries where its vendors are	Made and hosted in the EU: servers and team offices are in Europe. The holding company is in Delaware, US
What happens before it acts?	Requires approvalAsks before important actions by default; adjustable	Requires approvalAgent pauses for confirmation on high-impact actions	Requires approvalNothing is sent, booked or bought until you confirm

Read the privacy policies yourself: Muse · ChatGPT · Lucie

Price and who can get it

Muse

Free with usage limits. Power $20/mo. Maximum $100/mo.

US only, adults 18+. Card needed at sign-up.

ChatGPT

Free. Go $8/mo (may include ads). Plus $20/mo. Pro from $100/mo.

Widely available. Agent mode on paid plans. ChatGPT Health in the US, 18+.

Lucie

7-day trial, then a subscription. See the App Store for prices where you live.

On the App Store and for Mac.

Also built in: health, focus and wellbeing

Lucie connects your body to your plans.

It notices patterns you would miss.

Lucie looks at your sleep next to the rest of your life and points out what keeps showing up.

Explore sleep and recovery

Send a photo of your lunch.

Lucie gives you a rough idea of calories and protein, and how it fits the rest of your day.

Our honest take

Pick Muse when

You want an agent to run errands while your phone is away
You don’t mind trusting your data and attention to Meta, an ad-funded company
You are in the US and want to start free

Pick ChatGPT when

You write, study or research a lot
You want one assistant for ideas, questions and documents
You want agent tasks you can supervise, on a paid plan

Pick Lucie when

You want everything they do: errands, email, calendar and bookings
You also want your health, sleep and relationships connected to your plans
You want it all in one place, with your data kept private

Mostly writing, research and ideas?ChatGPT. It is the stronger general assistant.
Mostly errands, in WhatsApp, in the US?Muse. It is free to start and built to act.
Want an assistant that looks ahead?Lucie. Research, drafts, plans and bookings with your approval, plus proactive support. Not the tool for heavy research or coding.

What people report on X

Muse

What works

Meta @muse dropped my car insurance by 71%. Seriously- only thing I changed was $300 deductible to $1000 deductible. pic.twitter.com/CEgWa5cl47
— Renewed Health (@Gramps_bloomers) November 4, 2026

$meta @Muse voice is superb!! Quietly rolled out and has been amazing to use. Can make outbound calls for reservations too 🎊
Maybe next thing is to get muse into iMessage/ WhatsApp and add to group chats ? Atleast WhatsApp?@kunalb11 @alexandr_wang
— Dhiraj (@dhiraj349) November 1, 2026

What goes wrong

WTF, Meta!

Muse put the title of every shared chat into the web address, and those addresses ended up in public DNS records.

Security company Claroc found more than 6,800 shared Muse conversations with basically one search. They opened hundreds of them without logging in and…
— Mike Chan | Deep Ventures 🤘 (@mikewchan) October 21, 2026

No, not even close. Grok Bot is the only one who can actually do work without getting stuck.

I've had issues with Claude getting blocked on websites. Muse gets blocked on "click to verify you're not a robot." Grok Bot is the only one where I can set it and forget it.

I've…
— Zane Campbell (@zaneccampbell) November 4, 2026

ChatGPT

What works

So I bought this aged channel and it happened to be that it’s maxed on its subscription. Subscribed to over 350 channels and I thought of an easier way to unsubscribe to all because I couldn’t subscribe to my competitors. Decided to give the task to ChatGPT agent to do that for… pic.twitter.com/pMk6eH1bV5
— Emmanuel Desmond (@manueldesmondd) November 1, 2026

I used a ChatGPT agent to talk to sky on live chat and reduce my bill by £60 a month…
— James Smith (@therealhostman) November 4, 2026

What goes wrong

Told my ChatGPT agent: "I need the biggest external drive you can find. Card's connected. Go buy it."

It searched, picked a 26TB WD, and placed the order on Amazon. Straight from my bank card.

Total time I spent: zero seconds.

My time is worth more than my money, so I'll take… pic.twitter.com/TbUaL6Ob2U
— Sina Estavi 🇮🇷 (@SinaEstavi) October 19, 2026

Agentic commerce is undeniably overhyped based on current usage

...but, I'd be willing to bet it's massively underhyped based on volume agents will drive in ~3-6 months.

And, if you're not optimizing your product (software, service, or physical good) for agents, you'll be left… https://t.co/PhbdCZutpA
— Olivia Moore (@omooretweets) November 4, 2026

Your life is more than a to-do list.

Your inbox, calendar, sleep and workouts in one AI.

Discover Lucie Get it on iPhone

iPhone and Mac.

Questions people ask

Is ChatGPT or Muse better for personal assistance?

It depends on what you need. ChatGPT is better for writing, research and supervised agent tasks. Muse is built for errands and keeps working in the background. Check their current integrations, prices and approval rules before you choose.

What is Lucie’s proactive support?

Proactive support is how Lucie helps before you ask. It connects signals from your calendar, email, health and daily life, recognises what matters and suggests the next step. Anything it sends, books or changes waits for your yes.

Is Muse free?

Muse has a free plan with usage limits, plus Power at $20 a month and Maximum at $100 a month, per Meta’s help center.

Can ChatGPT book things for me?

Agent mode, on paid plans, can browse websites and fill in forms. It pauses for your confirmation on high-impact actions.

Does ChatGPT have ads?

Yes, on the Free and Go plans, starting in the US in February 2026. Plus and Pro have no ads, per OpenAI.

Does Muse use my chats for ads?

Meta says Muse conversations and data on your Muse cloud computer are not shared with its ad systems. Training is on by default, and you can turn it off under Data controls.

Does Lucie train on my chats?

No. Lucie does not train on your chats, never sells your data and has no ads. It is made and hosted in the EU, with servers and team offices in Europe.

Can I move my ChatGPT history to Lucie?

Yes. Lucie can import a supported ChatGPT export into its memory. You can review and edit what it keeps.

Related comparisons

ChatGPT

ClaudeLucieChatGPT vs Claude vs LucieThe two biggest AI assistants, and the one built for your day.

Muse

InstinctLucieMuse vs Instinct vs LucieTwo personal agents, two very different ideas about asking first.

Muse

Grok BotLucieMuse vs Grok Bot vs LucieMeta’s personal agent against xAI’s bots for work.

Instinct

PokeLucieInstinct vs Poke vs LucieTwo assistants you text. One does more on its own, one is easier to start.

More about Lucie

Sources

How we compared. We read each product’s own website, help pages, terms and privacy policy, then reputable press where official pages were missing or unreachable. Anything we could not confirm is labelled. Lucie is our product, so we have tried to describe the others the way we would want to be described. The Lucie screens on this page are illustrations, not screenshots.

The short answer

How Muse, ChatGPT and Lucie compare

How Muse, ChatGPT and Lucie differ

01Assistant or agent?

02Best for writing and research?

03Best for errands?

04Where does it live?

Reactive or proactive?

Muse

ChatGPT

Lucie

Reactive AI answers.Lucie’s proactive support looks ahead.

Ready for tomorrow’s meeting, without asking.

Bring what your old AI knew.

Muse, ChatGPT and Lucie, feature by feature

Who benefits from knowing so much about you?

Price and who can get it

Muse

ChatGPT

Lucie

Also built in: health, focus and wellbeing

It notices patterns you would miss.

Send a photo of your lunch.

Our honest take

Pick Muse when

Pick ChatGPT when

Pick Lucie when

What people report on X

Muse

What works

What goes wrong

ChatGPT

What works

What goes wrong

Your life is more than a to-do list.

Questions people ask

Related comparisons

More about Lucie

Sources

Reactive AI answers.
Lucie’s proactive support looks ahead.