ChatGPT reached 1.2 billion weekly users in September 2026, according to Sam Altman at OpenAI DevDay, up from 900 million in February 2026. It was the #1 most downloaded app globally in 2025, handled 2.5 billion prompts per day by mid-2025, and 92% of Fortune 500 companies use it. Here are 80+ ChatGPT and OpenAI statistics for 2026.
How Many People Use ChatGPT? (2026)
1.2 billion weekly users in September 2026 (Engadget)
5.72 billion website visits in January 2026 (SimilarWeb)
2.5 billion prompts processed per day as of July 2025 (Incremys)
845 million app downloads in 2025 — #1 most downloaded app globally (AppTweak)
Key trend: ChatGPT still leads, but its share of generative AI web traffic fell from 73.3% to 55.5% between August 2025 and August 2026. Gemini roughly doubled and Claude nearly quintupled. ChatGPT did win back some share in mid-2026, up from a low of 52.7%.
4 million developers had built with OpenAI by October 2025; 2.1 million active (SQ Magazine)
6 billion+ API tokens processed per minute (DevDay, October 2025)
Key Takeaways
1.2B weekly users makes ChatGPT one of the most-used products on earth. It passed 1 billion weekly users in mid-2026, about seven months later than OpenAI had targeted.
Revenue is compounding ($13.1B in 2025, a $40B+ run rate by August 2026), but OpenAI is still burning billions. The $852B valuation is a bet on future dominance.
The moat is shrinking. ChatGPT’s share of generative AI web traffic fell from 73% to 56% in a year, while Gemini and Claude grew fastest.
ChatGPT is becoming a search engine. 9-17% of all digital queries, +740% YoY. Users spend 3x longer per session than on Google.
The workplace transformation is real. 92% of Fortune 500. 7M+ enterprise seats. Programmers completing 126% more per week.
Models ship fast. GPT-5, 5.4, 5.5 and GPT-6 all arrived within 13 months, and each cut factual errors further. The best hallucination rates have dropped 96% since 2021.
Sam Altman said ChatGPT had 1.2 billion weekly users at OpenAI DevDay in September 2026, up from 900 million in February 2026. It reached 100 million users in just 2 months — the fastest-growing consumer app in history.
How much money does ChatGPT make?
OpenAI made $13.1 billion in revenue in 2025, and its annualized run rate passed $40 billion in August 2026. Enterprise customers now bring in more than half of revenue, ahead of consumer ChatGPT subscriptions. OpenAI is still not profitable; it burned $3.7 billion in Q1 2026 alone.
Is ChatGPT losing market share?
Yes. ChatGPT’s share of generative AI web traffic fell from 73.3% to 55.5% between August 2025 and August 2026, per Similarweb. Google Gemini grew to 25.6% and Claude to 9.3%. The market is growing so fast that ChatGPT is still adding users, just slower than some competitors.
How many businesses use ChatGPT?
OpenAI reported 9 million+ paying business users in February 2026. 92% of Fortune 500 companies have adopted it, and by August 2026 enterprise customers generated the majority of OpenAI’s revenue.
Is ChatGPT replacing Google?
Not yet, but it’s gaining fast. ChatGPT’s search market share grew +740% YoY and now handles 9-17% of all digital queries. 23 million users are ChatGPT-exclusive (don’t use Google). Users spend 14+ minutes per ChatGPT session vs 5 minutes on Google.
How accurate is ChatGPT?
Accuracy keeps improving with each release. GPT-5 made 45% fewer factual mistakes than GPT-4o, and GPT-5.4 cut factual errors another 33% versus GPT-5.2. The best models’ hallucination rates fell from 21.8% in 2021 to 0.7% in 2025, but ChatGPT can still be confidently wrong, so verify important facts.
Rok is a professional content creator, WordPress developer and enthusiastic marketer who spends most of his day behind the screen, working on ULTIDA, client projects and listening to black metal. But he never misses a daily workout to get the blood flow going.
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