Hark vs Muse vs Claude vs ChatGPT vs Grok

Updated: October 2026 · 8 min read · By the CreatorSprout team

Comparison based on each company's official pages and launch reporting from October 2026 — not a hands-on five-way test. Prices are the US list prices reported at the time of writing and change often; verify on the official pricing page before you pay. No affiliate links in this article.

The real split: agents vs chatbots

Until this autumn, "AI assistant" meant a chat window. Two September–October 2026 launches changed that. Meta's Muse (September 8) and Hark Pro (October 6) are built to operate the web on your behalf: each runs its own cloud computer, logs into sites with your credentials, and keeps working after you close the app. You supervise through approvals instead of doing the clicks yourself.

Claude, ChatGPT and Grok remain chat-first. All three have added agentic extras, but their core loop is still: you ask, it answers, you act. Neither design is "better" in the abstract — they solve different problems, and they ask for very different levels of trust. An agent needs your email, calendar and payment access to be useful. A chatbot needs none of that.

At a glance

Hark Pro: the proactive newcomer

Hark is a startup founded by Brett Adcock (who also founded the robotics company Figure). Hark Pro launched on October 6, 2026 on web, iOS and Android. Its bet: an assistant should notice what needs doing before you ask. Connect your email, calendar, files and payment cards, and Hark surfaces a feed of suggested actions — approve an expense, refill a kid's lunch card, book the flight in that email thread — each with an Action Button so you confirm with one tap.

The machinery underneath is Handoff, Hark's cloud computer, which the company says can run up to six browsers at once and log into sites on your behalf. The underlying model is trained specifically for computer use rather than general chat. Hark's pitch leans hard on privacy: your data is yours, never sold, never shared with advertisers, and deletable at any time. The company is also a preview act for hardware — Hark plans to ship its first devices in 2027.

• Strengths: proactive by design; approval on every sensitive action; free tier is genuinely usable; you can watch the agent browse while it works.
• Watch out: it is weeks old and unproven at scale; the usefulness requires handing a young startup deep access to your accounts and cards; availability outside the US is unconfirmed.

Muse: Meta's personal agent

Muse is Meta's personal-agent app, launched September 8, 2026 and powered by the Muse Spark 1.3 model. Not to be confused with Meta AI (the chat assistant inside WhatsApp and Instagram) — Muse is the one that does things: it sends emails, books travel, fills in forms, tracks prices, and checks out using one-time card numbers. It keeps working in the background after you close the app, and it lives on iOS, Android, the web, WhatsApp and a Mac app.

Meta built an unusually explicit safety wrapper around it. Every user gets a Secure VM — an isolated cloud computer with its own browser. A separate guard program, Sentinel, must approve anything before it leaves the machine to the internet, and your passwords sit in a vault the agent itself cannot see into. Purchases and sent emails need your approval first. The free tier allows up to 100 million tokens a week (a payment card is required even to sign up), then Power at $20/month and Maximum at $100/month raise the allowance. It is currently available to adults in the US and Canada.

• Strengths: the most carefully explained safety model of any consumer agent; generous free allowance; works where you already are — including inside WhatsApp; no ads, and Meta says Muse data stays out of its ad systems.
• Watch out: brand new, and early hands-on tests caught real mistakes (one reviewer was recommended restaurants that had closed years ago); Amazon blocks Muse outright; it only makes sense if you are comfortable giving Meta your email, calendar and browser.

Claude: the writer-coder

Claude, from Anthropic, is the chat-first assistant that writers, researchers and programmers consistently rate highest for output quality. Its current Opus, Sonnet and Haiku model family leads most independent coding and long-form reasoning evaluations, and the Pro plan (around $20/month) includes Claude Code, Anthropic's terminal coding agent, alongside Projects, Artifacts and file analysis. The free tier is capable; Max plans (from around $100/month) multiply the usage limits for people who hit Pro's caps daily.

• Strengths: best-in-class writing tone and coding; careful, low-hallucination answers; excellent with long documents; usage limits are session-based rather than per-message guesswork.
• Watch out: no native image generation — if you need pictures generated in-chat, look elsewhere; it will not run your errands or operate websites for you the way Hark and Muse do.

ChatGPT: the default

ChatGPT is still the world's default AI assistant — "chatgpt" is the second most searched term on Google globally, behind only "youtube," at roughly 1.1 billion searches a month by Semrush's estimate. OpenAI's GPT-6 model line powers a product that does a bit of everything: chat and reasoning, image generation, voice conversation, custom GPTs, Projects, memory, and the Codex coding agent. Plans run from a free tier through Go (around $8/month) and Plus (around $20/month) to Pro tiers at $100–$200 for heavy users.

• Strengths: the widest ecosystem of integrations and third-party tools; the only one of the three chatbots with first-rate image generation built in; voice mode is the most polished; if a tutorial exists for an AI task, it probably assumes ChatGPT.
• Watch out: the plan menu is the most confusing of the five; advanced features are metered even on paid plans; quality varies more between its model modes than Claude's.

Grok: the X-native

Grok, from Elon Musk's xAI, is built around one advantage nobody else can copy: live access to the X (Twitter) firehose, which makes it the fastest of the five on breaking news and public reaction. The Grok 4 model line adds image and video generation through Grok Imagine, and its tone is deliberately looser than its rivals'. Pricing is the outlier here: the free tier is limited, SuperGrok Lite runs around $10/month, the standard SuperGrok is around $30/month — pricier than the other main plans — and Heavy reaches $300. Grok is also bundled into X Premium subscriptions. Developers get a notable perk: xAI's API pricing for its flagship models undercuts OpenAI and Anthropic by a wide margin.

• Strengths: real-time X data; image and video generation included; the cheapest flagship API for developers; answers feel fast and unfiltered.
• Watch out: the standard subscription costs more than Claude Pro or ChatGPT Plus; comparative reviews find its reasoning depth less consistent than Claude's or ChatGPT's; its value drops sharply if you don't care about X.

Pricing compared

The headline: four of the five main plans sit at $20/month — Hark, Muse Power, Claude Pro and ChatGPT Plus — with SuperGrok the exception at around $30. The real differences are in what the free tiers allow and what the top tiers are for. Hark and Muse meter you by how much the agent does; the chatbots meter advanced features and usage volume. Every assistant here has a free tier generous enough to judge the core experience, so paying before trying makes little sense. Prices are US list prices as reported in October 2026 and change frequently — treat the table as a map, not a quote.

Which one should you pick?

• "I want my life admin done for me": Muse if you live in Meta's apps and are in the US or Canada — the approval gates and credential vault are the most thought-through. Hark Pro if you want the proactive feed and the privacy-first pitch, and accept that it is a weeks-old startup.
• "I write, research or code for a living": Claude Pro. It is the output-quality pick, and Claude Code alone justifies the plan for developers.
• "I want one subscription that does a bit of everything": ChatGPT Plus — chat, images, voice, coding help and the biggest ecosystem, at the same $20.
• "I follow news and markets on X": Grok. Nobody else has the live X feed, and Imagine covers quick image/video generation.
• "I pay for nothing": start with Muse's and Hark's free agent tiers for errands and Claude's or ChatGPT's free tier for questions. In 2026, free is a legitimate strategy — the agents especially are subsidising adoption.

The honest caveats

• This is not a hands-on five-way test. It is built from official product pages, pricing pages and launch reporting (TechCrunch, Reuters, CNBC and hands-on reviews) as of October 2026. We say plainly where a claim is a company's own.
• The two agents are weeks old. Hark Pro launched October 6 and Muse September 8, 2026. Expect rough edges, changing limits and features that shift under you.
• Agent access is a trust decision. Hark and Muse only work with access to your email, calendar and payment methods. Their approval gates and vaults reduce the risk; they do not remove it. Read the privacy terms before connecting a card.
• Prices move. Three of these five changed pricing or tiers within the last six weeks. Confirm on the official page at checkout.

FAQ

What is Hark?

Hark is an AI startup founded by Brett Adcock (the founder of robotics company Figure). Its product, Hark Pro, launched on October 6, 2026: a proactive personal assistant that connects to your email, calendar, files and payment cards, then suggests and carries out tasks — booking, buying, paying bills — through its Handoff cloud computer, with your approval on each sensitive action. It is free with paid tiers at $20 and $100 a month for higher usage.

Is Muse the same as Meta AI?

No. Meta AI is Meta's chat assistant inside WhatsApp, Instagram and the Meta AI app. Muse is a separate personal-agent app Meta launched on September 8, 2026: it runs in its own secure cloud computer, works on tasks in the background after you close the app, and asks your approval before sending emails or making purchases. Muse is currently available in the US and Canada for adults.

Which AI assistant is best for coding?

Claude, on current reviews and benchmarks — its Pro plan includes Claude Code, and the Claude models lead most independent coding evaluations. ChatGPT's Codex is the closest rival. Hark and Muse are personal agents for life admin, not coding tools, and Grok trails the leaders on coding depth.

Which AI assistant is cheapest?

All five have free tiers. Among paid plans, ChatGPT Go (around $8 a month) and SuperGrok Lite (around $10) are the cheapest entry points. The main plans cluster at $20 a month — Claude Pro, ChatGPT Plus, Hark, and Muse Power — except SuperGrok at around $30. Prices change often; check the official pricing page before paying.

Which of these actually does tasks instead of just answering?

Hark Pro and Meta Muse. Both are agent-first products built to operate websites on your behalf — booking travel, filling forms, checking out — with an approval step before anything sensitive. Claude, ChatGPT and Grok are chat-first assistants: superb at answers, writing and analysis, with some agentic features added on, but doing tasks for you is not their core design.

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