All four assistants have a free plan and can draft emails, summarize documents, plan trips and answer questions. The best choice usually depends on which apps you already use, not on which model is "smartest" this month. Try the free plans with your own real tasks before paying.
| Assistant | Free plan | Entry paid plans | Power plans |
|---|---|---|---|
| ChatGPT (OpenAI) | Yes | Go $8/mo; Plus $20/mo | Pro tiers from $100/mo |
| Claude (Anthropic) | Yes | Pro $20/mo ($17/mo billed yearly) | Max $100 or $200/mo |
| Gemini (Google) | Yes | Google AI Plus $4.99/mo; AI Pro $19.99/mo | AI Ultra from $99.99/mo |
| Grok (xAI) | Yes | X Subscription Plus $8/mo; Premium $30/mo | Super $100, Ultra $200/mo |
Google AI Pro also includes extra Google One storage. Grok paid plans are now sold as "The X Subscription"; existing SuperGrok subscribers can keep their plan.
All four can make mistakes. Check facts, numbers and anything legal, medical or financial yourself.
Prices are US list prices checked on October 15, 2026 from the vendors' public pages and change often. Always confirm on the official pricing page before you buy. AgentButler has no affiliate deals with any vendor named here.
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