Grok, ChatGPT, Muse or Hermes: Which Personal AI Agent to Pick

Grok, ChatGPT, Meta and Hermes all have a personal AI agent now, and they all sound the same. Pick Grok Bot if you want one agent working across all your apps. Pick ChatGPT's dots if you live in your email and calendar. Pick Meta's Muse if you run a small business in the US or Canada. And pick Hermes Agent if you want it free and on your own computer.

None of them is best at everything. They differ on price, on where you can get them, and on what they can touch.

Below is what each one costs and when to pick it, checked on 26 October 2026, then the free Hermes setup and the one rule to set on any of them.

What does each personal AI agent do, and what does it cost?

A personal AI agent doesn't just answer questions. You give it a goal, it keeps working in the background, and it comes back to you when it needs a decision.

Grok Bot: one agent working across all your apps

Grok Bot, from xAI, gets its own computer in the cloud. It signs into your tools, uses them the way you do and runs routines on a schedule. Show it a workflow once and it saves it as a routine. In xAI's launch post, one team's bot processes the invoices that arrive in Gmail.

It's included on The X Subscription's Premium plan at $30 a month, and on Super and Ultra, but not on Free or Plus. You talk to it from the desktop app on macOS or Windows, or the iOS app.

ChatGPT dots: an agent for your inbox and calendar

Dots are OpenAI's always-on agents inside ChatGPT. Each one has its own cloud computer and connects to the apps you choose, including your personal email, and you can ask it to check your calendar every morning and tell you what's coming up. In OpenAI's launch post, a tester's dot noticed he'd forgotten to invoice a publication, prepared the invoice and sent it after he approved.

Your first dot comes with ChatGPT Pro, which starts at $100 a month, or with Business Premium. Pro users in the UK, the EEA and Switzerland can't get one for now.

Muse: an agent for running a small business

Muse is Meta's personal AI agent, and Muse for Small Business connects it to the tools a business runs on. Meta names 15 of them, including Shopify, Stripe and Canva. Stripe says that through Muse you can send invoices and payment links without leaving the chat.

It's free for most of what people need, with paid plans if you want more. But it's only available to people in the US and Canada who are 18 or over.

Hermes Agent: a free agent on your own computer

Hermes Agent is Nous Research's open-source agent. It's MIT licensed and has over 257,000 stars on GitHub. It runs on a Mac, a Windows or Linux machine, or a $5 server, and you message it on WhatsApp, Telegram, Slack, Discord or Signal. It also runs scheduled jobs and remembers you across sessions.

The agent itself is free. It works with whichever model you choose, including Nous Portal's free models or a model running on your own computer, so it can cost you nothing at all.

How do you set up Hermes Agent for free?

Four steps, all from Hermes' own docs.

1. Install it. On a Mac with Apple silicon or a Windows PC, download the free Hermes Desktop app. On Linux, run:

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   curl -fsSL https://hermes-agent.nousresearch.com/install.sh | bash
   

2. Pick a model. Run hermes model, or open Settings, then Providers, in the desktop app. Two free routes: Nous Portal's Free plan, which covers free models only, or a local model through Ollama or LM Studio. Hermes needs a model with at least 64K tokens of context, so in Ollama set -c 65536.

3. Connect Telegram or WhatsApp. In the desktop app, open Messaging, then Telegram, click Create with QR and scan the code in Telegram. Hermes creates the bot for you. From the command line, run hermes gateway setup, pick a platform, then hermes gateway start. WhatsApp runs through an unofficial bridge with a small risk of account restrictions, so use a dedicated number, not your personal one.

4. Keep approvals on. By default, Hermes uses a second model to judge risky commands and asks you when it's unsure. To make it ask you about every dangerous command, set this in ~/.hermes/config.yaml, and never switch on YOLO mode (/yolo), which skips the checks:

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   approvals:
     mode: manual

How do you stop an AI agent spending your money?

Whichever agent you pick, make it ask before it spends. In a 15 October simulation by Vals AI, an assistant chasing a refund it couldn't get sent 187 messages in 15 simulated days.

The other three have approvals built in. Dots let you set Custom Rules that require your approval, Meta says Muse never sends or spends without yours, and Grok Bot comes back to you when your approval is needed. Check they're on, then give your agent this line:

Ask me before you spend money, buy anything or send a message on my behalf.

To run Hermes on a free local model, see our free GitHub repos for running AI locally. To find the jobs an agent could take off your team, take the free AI bottleneck test, or read our insights on AI implementation.