a16z data: Lawyers using Codex saw a 108x increase in weekly active usage

a16z's latest chart reveals extreme divergence in OpenAI Codex's weekly active user growth across enterprises. Lawyers lead with a 108x increase, followed by sales and recruiting at 41x each, marketing at 26x, healthcare at 24x, while engineers trail at just 5x. Codex has evolved beyond basic code completion into an autonomous digital coworker capable of decomposing tasks and running independently for hours, with legal professionals already leveraging it to process massive volumes of lengthy documents and conduct contract comparisons. This marks the "programmability" of knowledge work, signaling that the AI tipping point is shifting from the tech sector to high-value white-collar roles.