The most used AI in the world is ChatGPT, with over 700 million weekly users in 2026, according to OpenAI data. It’s followed by Gemini, Microsoft Copilot, Meta AI (inside WhatsApp/Instagram), and Claude. Distribution shifts fast — no one holds the top for more than 1-2 years anymore.
Top 10 most used AI in 2026
| Rank | AI | Approx. weekly users | Owner |
|---|---|---|---|
| 1 | ChatGPT | 700M+ | OpenAI |
| 2 | Gemini | 400M+ | |
| 3 | Meta AI | 500M+ (via WhatsApp) | Meta |
| 4 | Copilot | 200M+ | Microsoft |
| 5 | Claude | 40M+ | Anthropic |
| 6 | Grok | 30M+ | xAI (Musk) |
| 7 | DeepSeek | 30M+ | High-Flyer (China) |
| 8 | Perplexity | 20M+ | Perplexity |
| 9 | Character.AI | 20M+ | Google/Character |
| 10 | Doubao / Qwen | 100M+ (China) | ByteDance / Alibaba |
Approximate numbers based on public reports and market analyses. Meta AI and Doubao have huge bases but concentrated in specific regions.
Why ChatGPT leads
Three reasons:
- First-mover effect: launched November 2022 when nobody else had anything similar. Grew 100M users in 2 months — fastest product in history.
- Brand: became synonymous with AI, like “Xerox” became synonymous with copying
- Ecosystem: OpenAI’s App Store, integration with dozens of apps, huge community creating prompts and templates
Meta AI: the silent giant
Many forget about Meta AI, but it runs inside WhatsApp, Instagram, and Messenger — in over 200 countries. It’s the blue circle button in WhatsApp. Since those apps already have billions of users, Meta AI gains passive users who didn’t seek it out.
Worth testing: ask anything in WhatsApp under @Meta AI.
Important regionalisms
- China: ChatGPT and Google are blocked. Market dominated by Doubao (ByteDance) and Qwen (Alibaba). Together, hundreds of millions of users.
- Russia: YandexGPT and GigaChat from Sber
- Europe: use the same globals (ChatGPT, Gemini, Claude) with Mistral growing strong in France
- US: predominantly ChatGPT, followed by Gemini and Meta AI (via WhatsApp)
What “most used” has to do with “best”
Little. Popularity follows brand, distribution, and ease — not technical quality. In independent benchmarks:
- Best for code: DeepSeek, GPT-5, Claude (tied)
- Best for writing: Claude, GPT-5
- Best for math reasoning: GPT-5 Thinking, DeepSeek-R2
- Best for research with sources: Perplexity, Gemini
So: use ChatGPT because it’s the best to start with, not because it’s the best at everything. Then expand your arsenal.
How to choose
- If you’ve never used AI → free ChatGPT
- If you use Google → Gemini
- If you want to compare → ChatGPT vs Gemini and best free AI
- If you want alternatives → AIs better than ChatGPT
In 2027 this ranking could look different. AI has changed more in 3 years than the internet did in its first 10.