OpenAI has reached 400 million weekly active users, up from 300 million in December.

According to CNBC, the company’s user base grew by 33% despite competition from AI models like DeepSeek and recent tensions with Microsoft.

OpenAI COO Brad Lightcap attributed the growth to word-of-mouth adoption, stating that users find the tools valuable and see others using them. This milestone reinforces OpenAI’s strong position in the AI market.


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