All the big chatbots can answer questions and draft an email. They differ in what they're best at, how much you get for free, and what they're like to talk to all day.
ChatGPT is the best AI chatbot for most people — the most versatile, with a free tier that now has unlimited text chats. Claude is the better pick for writing and code, Gemini the natural fit for Google users, and DeepSeek the best option that never asks for money.
| App | Free tier | Paid from | Top plan | Best for |
|---|---|---|---|---|
| ChatGPT | Yes | $8/mo | $500/mo | Everyday writing, brainstorming, image generation, casual coding |
| Claude | Yes | $20/mo | $100–200/mo | Document analysis, research papers, nuanced writing, software engineering |
| Gemini | Yes | $4.99/mo | $99.99–199.99/mo | Google ecosystem users, video generation, very long documents (1M tokens) |
| DeepSeek | Yes | — | — | Math, logic, coding for users on a budget — or curious experimenters |
| Perplexity | Yes | $20/mo | $200/mo | Research with verifiable sources, fact-checking, exploring unfamiliar topics |
| Grok | Yes | $30–40/mo | $300/mo | Current events, X/Twitter integration, less-filtered responses |
| Mistral Vibe | Yes | $14.99/mo | $24.99/mo | Users who want a privacy-conscious European alternative to ChatGPT/Claude with all-day agentic coding built in |
Monthly prices in US dollars before tax, from each vendor's official pricing (US list price; weekly-billed plans converted to a monthly figure). Updated October 7, 2026
The most popular assistant for a reason: one app covers writing, brainstorming, images, voice and casual coding. Its weak spot is the plan maze — Free, Go, Plus, Pro and Pro 500.
Pick it if: you want a chatbot that's good at nearly everything.
Full ChatGPT pricing →Claude is tuned for careful reasoning and nuanced writing, and handles long pasted documents well. It can't make images or video, and its caps are tighter than ChatGPT's.
Pick it if: you care more about the quality of each answer than about extra features.
Full Claude pricing →Gemini sits inside Gmail, Docs and Drive and is the strongest of the chatbots for video generation. On hard reasoning it still trails ChatGPT and Claude, and the interface changes often.
Pick it if: your email, files and phone are already Google.
Full Gemini pricing →Unlimited chat with selectable thinking effort on V4-Pro, at no cost and without ads. The UX is less polished than the big names, and it's hosted in China.
Pick it if: you want a capable chatbot and won't pay a cent.
Full DeepSeek pricing →It behaves like a search engine that writes: every reply cites its sources. That makes it a weak partner for creative writing or open-ended chat.
Pick it if: you want answers you can verify.
Full Perplexity pricing →Grok reads X in real time and has a less-filtered voice. The free tier allows only 2 prompts every 2 hours, and its cheapest paid plan ($30–40/mo) costs more than any other chatbot's entry plan here.
Pick it if: breaking news and X conversations are what you ask about most.
Full Grok pricing →Mistral's assistant — formerly Le Chat — adds web search, image generation and agentic coding, and positions itself as the privacy-conscious European choice. Free limits aren't published as exact numbers.
Pick it if: you'd rather your chatbot came from a European company.
Full Mistral Vibe pricing →If what you want is ongoing conversation with a character rather than answers, Character.AI is a different kind of product: user-made characters, voice calls and roleplay. It's not a general knowledge assistant, and under-18 accounts lost open-ended chat in late 2025.
It depends on the task. Claude is the specialist for careful reasoning, long documents and code; ChatGPT is the most versatile; Gemini trails both on hard reasoning but leads on video. Their top models sit on the paid plans.
ChatGPT Free (unlimited text chats, voice, file uploads) for most people, or DeepSeek if you want something with no paid tier at all. Gemini's free tier is also very generous.
How we choose: prices come from each vendor's official pricing page and are re-checked every week. We take no affiliate fees, so rankings aren't for sale.