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OpenAI passes 1 billion active users; \'Codex changed the game\'

OpenAI said active users of its AI models have surpassed 1 billion and the number of companies adopting them has topped 2 million. The figures were disclosed by Chief Financial Officer Sarah Fryer (사라 프라이어) in a company blog post. OpenAI said usage intensity is rising and internal agent-style work via Codex accounts for 99.8 percent of weekly output tokens. It also detailed operational optimisations and cost reductions alongside a recent price cut for GPT-5.6 models.