OpenAI says nearly all its employees have switched from chatbots to Codex agents, but every number comes from OpenAI itself

OpenAI’s Shift to Agentic AI

Nearly 98 percent of OpenAI’s employees now use Codex, the company’s AI coding agent, up from roughly 40 percent in August 2025, according to a paper the company published on Wednesday titled “The Shift to Agentic AI: Evidence from Codex.” The paper describes a fundamental change in how the company’s own workforce interacts with AI.

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