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Story summary
- OpenAI's ChatGPT slowed growth from August to November 2025, rising 6% to about 810 million MAU.
- Google's Gemini increased 30% in the same period, aided by the Nano Banana image model.
- ChatGPT still commands 55% of global MAU but shed three percentage points in four months.
- Competitors Perplexity and Claude grew 370% and 190%, respectively.
- OpenAI's CEO issued a "code red" memo urging improvements in personalization and reliability.
