ChatGPT surpassed 400M weekly active users in February 2025 and launched GPT-4o with voice, image, and real-time reasoning — the world's most-used AI product.
ChatGPT is OpenAI's flagship AI assistant, launched in November 2022 and credited with igniting mainstream consumer adoption of generative AI. It crossed 100 million users in two months — the fastest consumer product to do so in history — and reached 400 million weekly active users by February 2025. Available as a free web and mobile app with a ChatGPT Plus subscription ($20/month) unlocking GPT-4o, advanced voice mode, image generation, and longer context.
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