Ask five people which AI assistant is best and you will get five different answers, because they are optimized for different things. This page is a reference, not a ranking: what each of the seven major general-purpose AI assistants is, who builds it, what it is genuinely good at, and where it falls short — so you can pick based on your actual task instead of brand loyalty.
Search interest, by the numbers
One honest signal for how much attention each platform gets: how often people search for it. Here is US monthly search volume for each assistant's clearest, least-ambiguous keyword, log-scaled because the gap between the largest and smallest is enormous.
Each bar uses that platform's clearest unambiguous keyword — bare "ChatGPT" has no competing meaning, while "Gemini," "Copilot," and "Grok" need a qualifier to separate the AI product from unrelated meanings (the zodiac sign, GitHub Copilot, the stock ticker) or another company's product. Scale is logarithmic; the gap between ChatGPT and the rest is real, not a chart artifact. Source: Ahrefs, US monthly search volume, August 2026.
Side-by-side comparison
Pricing changes often; treat the figures below as a rough snapshot from August 2026, not a live price list — check each platform's own page (linked below) for current terms.
| Assistant | Maker | Launched | Free tier | Paid from | Best known for |
|---|---|---|---|---|---|
| ChatGPT | OpenAI | Nov 2022 | Yes, limited | Plus, ~$20/mo | Mass adoption, custom GPTs |
| Claude | Anthropic | Mar–Jul 2023 | Yes, limited | Pro, ~$20/mo | Long documents, coding |
| Gemini | Mar 2023 (as Bard); Feb 2024 (Gemini) | Yes | AI Plus, ~$5/mo | Integration with Google apps | |
| Microsoft Copilot | Microsoft | Feb 2023 (Bing Chat); Dec 2023 (Copilot) | Yes | Via Microsoft 365 Premium, ~$20/mo | Built into Windows and Office |
| Perplexity | Perplexity AI | Dec 2022 | Yes, unlimited basic | Pro, ~$20/mo | Cited, sourced answers |
| Grok | xAI (now SpaceXAI) | Nov 2023 | Yes, limited | SuperGrok, ~$30/mo | Real-time access to X posts |
| Meta AI | Meta | Sep 2023 | Yes, largely free | Paid tier in limited testing only | Built into Meta's apps, free |
The seven, in one line each
ChatGPT
OpenAI's assistant — the one that brought conversational AI to a mass audience.
Read the profile →Claude
Anthropic's assistant — favored for long documents and software engineering.
Read the profile →Frequently asked questions
Which AI assistant is best?
There is no single best AI assistant — the strongest choice depends on the task. ChatGPT has the broadest ecosystem and adoption; Claude is often preferred for long-document work and coding; Gemini integrates deeply with Google's own products; Perplexity is built around cited, sourced answers; Microsoft Copilot is built into Windows and Office; Grok has real-time access to X posts; and Meta AI is free and built into Meta's apps. Try more than one on your actual task rather than assuming a universal winner.
What's the difference between ChatGPT and Claude?
ChatGPT is made by OpenAI and Claude is made by Anthropic — different companies, different underlying models, different tuning. Both are general-purpose AI assistants capable of writing, reasoning, and coding. ChatGPT has broader adoption, a larger plugin/GPT ecosystem, and native image generation; Claude is frequently favored for longer documents and software engineering work.
Which AI assistants are free to use?
ChatGPT, Claude, Gemini, Microsoft Copilot, Perplexity, Grok, and Meta AI all offer some form of free access, typically with usage limits, alongside paid tiers that raise those limits and unlock more capable models. Meta AI is notable for being free without a paid consumer tier as of this writing. Exact limits and pricing change often.
Which AI assistant is best for research with sources?
Perplexity is built specifically around live web search with cited sources, which makes it a strong default for research questions where you want to see where an answer came from. The others can browse and cite too, but that's an add-on rather than the core product.
Which AI assistant is most integrated into everyday apps?
Microsoft Copilot is built into Windows, Edge, and Office; Gemini is built into Google Search, Workspace, and Android; Meta AI is built into Facebook, Instagram, WhatsApp, and Messenger; and Grok is built into X. ChatGPT, Claude, and Perplexity are primarily standalone products.
More from highlevel.ai
For the technology underneath all seven, see what a large language model is, how AI works, and what generative AI is. To understand how assistants like these decide what to recommend, see how AI picks businesses.