CyberAgent, a Japanese internet company spanning advertising, media, and gaming, has adopted ChatGPT Enterprise and Codex as foundational AI technologies. This builds on their 2016 "AI Lab" and 2023 "AI Operations Office" initiatives, positioning AI as core to business growth rather than limited advanced projects. They've also developed "Kiwami Prediction AI" for advertising creative production.

The company achieved remarkable results with 93% monthly active user adoption across departments. They created a culture of sharing AI knowledge, using internal rankings to encourage proactive use while avoiding evaluation purposes. When employees discontinue use, their Slack bot reaches out to understand challenges and suggest alternatives. OpenAI training sessions further supported adoption.

Beyond engineering teams, CyberAgent expanded AI implementation across the organization. Teams now use Codex for design proposals, code review, and knowledge documentation, improving quality while speeding up development. Non-developers apply these tools for specifications, mockups, and structuring work adjacent to product development. The tools have even helped build systems that sustain ChatGPT adoption internally.