Grok Bot vs Buzz (2026): Which AI-Agent Platform Should You Actually Pick?

The short answer

Grok Bot is a managed, closed "AI-employee" service from xAI — turnkey cloud computers and learn-by-demonstration, but locked to Grok models and metered with a hard-to-predict bill.[6][3] Buzz is Block's free, open-source workspace where humans and AI agents share channels as peers, carry their own cryptographic identity, and run whatever model you bring.[1] If you can only pick one and you care about cost-versus-value and owning what you build, pick Buzz. Pick Grok Bot only if you want a zero-setup managed cloud computer and you're already inside the X/Grok/Cursor ecosystem.

Why this comparison matters now

For two years we called these things chatbots. Then, in the space of a few weeks in the summer of 2026, the whole industry changed vocabulary. Block shipped Buzz on July 21, and xAI shipped Grok Bot on August 11.[1][6]

Neither is a box you type into. Both are platforms for running teams of AI agents that hold a browser, a file system, and a terminal, receive a goal, and hand you back finished work.[6] The question is no longer "which AI answers better." It's "which platform do you trust to do the work while you sleep" — and the two answers could hardly be more different.

The comparison table

	Grok Bot	Buzz
Maker	xAI (SpaceXAI) + Cursor	Block (Jack Dorsey)
License	Closed source	Open source (Apache-2.0)
Platform fee	From $20/mo, metered upward	Free
Model choice	Grok only, no model picker	Any model/harness (Claude, Codex, GPT, goose…)
Agent identity	Tied to your account	Own cryptographic keypair, portable
Cloud computer	Managed Linux VM you don't control	Your own machine or your own relay
Platforms	macOS, Windows, iOS	macOS, Windows, Linux (+ mobile in progress)
Setup	Near-zero	Bring-your-own-glue

What Grok Bot is

Grok Bot, launched August 11, 2026 as an early beta, is a partnership between SpaceX AI, xAI's Grok models, and Cursor.[6] You create agents, give each a name, a title, and a job description, and it operates inside a persistent, always-on cloud computer with browser, file-system, and terminal access.[6] Your bots can talk to each other, delegate tasks, learn skills by watching you demonstrate a job once, and run on schedules.[6]

The genuinely clever part is that your bots share one cloud environment, so handing a task from a research bot to a writing bot costs nothing — they're already looking at the same files.[3] The less clever part is everything around the edges: there's no model picker, billing follows token cost, and there is still no Grok Bot-specific spend cap.[3] Early reviews were blunt about broken connectors, tasks that hang, and weak security around stored credentials.[6] Grok Bot runs on macOS, Windows, and iOS, with no Linux desktop, Android, or iPad client at launch.[4][3]

What Buzz is

Buzz is a free, open-source collaboration workspace built on the Nostr protocol, with channels, threads, direct messages, voice, media sharing, code repositories, and automated workflows.[1] The difference from Slack is the thesis baked into it: AI agents are not integrations bolted onto the side — they are team members. They hold their own cryptographic identities, have defined permissions, and participate in workflows, posting, reviewing code, and running approved automations alongside humans.[1]

Buzz is deliberately model-agnostic and agent-agnostic.[1] Teams deploy agents powered by any LLM or agent harness — Claude Code, Codex, goose — bring their own, or build new ones.[1] Under the hood, agents connect through ACP (the Agent Client Protocol), the open standard that started at Zed.[2] You can self-host your own Nostr relay and own every byte of it, or use Block's hosted version at buzz.xyz — free during the beta, with no usage limits set yet.[2] It's written mostly in Rust and lives on GitHub under Apache-2.0, where it cleared 30,000 stars within weeks.[8]

Where each one wins

Grok Bot wins on polish and zero setup. You open it, name a bot, and it has a working cloud computer. No config files, no model keys, no relay to stand up. If you want "hire an AI worker in five minutes," nothing else is as smooth.

Buzz wins on freedom and cost. You pick the model, the host, and the exact configuration, and none of it routes through a vendor unless you choose it.[1] An agent's identity — its history, its reputation — travels with it, not with the platform.[1] That's a real structural advantage Grok Bot simply doesn't offer.

Grok Bot's weakness is lock-in: closed source, Grok-only, and a meter you can't cap.[6][3] Buzz's weakness is maturity: it's young, mobile apps are unfinished, and pieces like git hosting backends, approval gates, and push notifications are still in progress.[5] One honest note — Buzz's "decentralization" is narrower than it sounds. Each workspace runs on a single authoritative relay with no gossip between relays, so you can own your data, but you're not getting censorship-resistance through redundancy.[5]

Cost vs value: the math that matters

This is where the decision gets made. Grok Bot has no standalone subscription.[3] You get it through a SpaceXAI or Cursor plan — Cursor Pro at $20 a month is the cheapest entry, SuperGrok at $30, climbing to SuperGrok Heavy around $300 and Cursor Ultra at $200.[3][7] At launch the floor was $200 a month; it only dropped to $20 after two price expansions inside fifteen days.[3]

The sticker price is not your real bill. Every tier carries a weekly usage allowance whose size is not published, and when you blow through it, on-demand usage bills from model and token cost.[3] There's no product-specific spend cap yet, and because there's no model picker, you can't switch to a cheaper model to slow the meter.[3]

Buzz's platform cost is zero. The software is free and open source, and the hosted relay is free during beta.[2] Your only real cost is whatever you already pay for models — a Claude Pro or ChatGPT Plus or Cursor subscription you likely hold anyway, or API keys for open models.[2] Run it self-hosted and your cost is your own machine and electricity.[2]

The value question flips depending on who's asking. Grok Bot's value is managed convenience — you pay a premium to not think about infrastructure. Buzz's value is compounding ownership — you pay nothing for the platform and keep the option to change models, hosts, or vendors without losing your agents.

Which one should you use when

Use Grok Bot when you want AI workers running 24/7 on a managed cloud computer with near-zero setup, you're already paying for Cursor or SuperGrok, and you don't mind being locked to Grok models with an unpredictable token bill.[3]

Use Buzz when you want model freedom and data sovereignty, you're cost-sensitive, you already have model subscriptions you want to plug in, or you're building something where the agents and their history need to outlive any single vendor.[1]

The verdict

If you can only pick one, pick Buzz — and it isn't especially close once cost-versus-value enters the room. A free, open platform you control, running any model you bring, beats a $20-and-up metered service that locks you to one vendor's models and one vendor's computer.

Grok Bot is the better product today if your only requirement is "turnkey and polished." But turnkey polish is a convenience you rent, and ownership is an asset you keep. The catch is that Buzz asks you to bring your own models and tolerate a young, still-in-progress tool. If that's a dealbreaker and you're already inside the Cursor/Grok ecosystem, Grok Bot is a perfectly reasonable way to get managed AI workers running this afternoon.

Sources

• [1] Block: Introducing Buzz
• [2] The New Stack: Block built a Slack for AI agents
• [3] AI Builder Club: Grok Bot Pricing 2026
• [4] Cursor Docs: Grok Bot
• [5] noze: Buzz — Block puts humans and agents in the same workspace
• [6] daily.dev: What you need to know about Grok Bot
• [7] xAI Grok pricing
• [8] GitHub: block/buzz

Frequently asked questions

What is Grok Bot?

Grok Bot is xAI's AI-agent platform, launched August 11, 2026 in partnership with Cursor. It lets you create persistent AI agents that each run in an always-on cloud computer with a browser, file system, and terminal.

What is Buzz?

Buzz is Block's free, open-source workspace where humans and AI agents work together in shared channels. Built on Nostr, it treats agents as team members with their own cryptographic identity and permissions.

Is Buzz free to use?

Yes. Buzz is free and open source under Apache-2.0, and Block's hosted relay at buzz.xyz is free during the beta with no usage limits set. You only pay for whatever AI models you bring.

How much does Grok Bot cost?

There is no standalone Grok Bot subscription. You get it through a Cursor or SpaceXAI plan, from Cursor Pro at $20/month up to SuperGrok Heavy around $300/month, plus on-demand token billing when you exceed the weekly allowance.

Is Grok Bot worth the price?

Grok Bot is worth it if you want turnkey, managed AI workers and you're already paying for Cursor or SuperGrok. If you're cost-sensitive and want model freedom, a free open-source alternative like Buzz is usually the better value.

Can Buzz use Claude, Codex, or GPT models?

Yes. Buzz is model-agnostic and agent-agnostic — you can deploy agents powered by Claude Code, Codex, goose, or any harness that speaks the ACP protocol.

What's the main difference between Grok Bot and Buzz?

Grok Bot is a closed, managed service locked to Grok models on xAI's cloud computers. Buzz is a free, open workspace where you bring any model and can self-host, so your agents and data stay under your control.

Which is better, Grok Bot or Buzz?

For most people optimizing cost-versus-value and ownership, Buzz is the better pick. Grok Bot is better only if you want a zero-setup managed cloud computer and don't mind Grok lock-in.

Which is cheaper — Grok Bot or Buzz?

Buzz is cheaper — the platform is free, and you pay only for your own models. Grok Bot starts at $20/month and climbs with weekly-allowance overage billed by token.

Can I bring my own AI model to Grok Bot?

No. Grok Bot has no model picker and runs only on xAI's Grok models, with billing that follows whichever model actually serves the request.

Is Buzz open source?

Yes. Buzz is licensed under Apache-2.0 and its code is on GitHub at github.com/block/buzz, where it passed 30,000 stars within weeks.

Can I self-host Buzz?

Yes. You can run your own Nostr relay and own all your data and agents, or use Block's hosted version at buzz.xyz.

What platforms does Grok Bot run on?

Grok Bot runs on macOS, Windows, and iOS. Linux desktop, Android, and iPad are not supported at initial launch.

What is the Agent Client Protocol (ACP)?

ACP is an open standard, originally from Zed, for connecting AI agents to tools over stdio. Buzz uses it so any ACP-speaking harness — goose, Codex, Claude Code — can join a workspace.

Which should I pick — Grok Bot or Buzz?

Pick Buzz if you want model freedom, data sovereignty, and no platform fee. Pick Grok Bot if you want a polished, managed cloud computer with zero setup and you're already in the Cursor/Grok ecosystem.