OpenAI says Holiday Extras rebuilt its main app with ChatGPT Enterprise and Codex

In an OpenAI customer story published November 12, Holiday Extras said it is using ChatGPT Enterprise and Codex to shift software building toward employee-led development. The travel company rebuilt its main mobile app in two weeks, a process that would previously have taken more than six months. After the rebuild, open-to-book conversion rose 32.5% and the app error rate fell from 19% to 9%. Holiday Extras also moved from one annual major release to weekly releases in the first month.