When an OpenAI finance analyst needed to compare revenue across geographies and customer cohorts last year, it took hours of work — hunting through 70,000 datasets, writing SQL queries, verifying table schemas. Today, the same analyst types a plain-English question into Slack and gets a finished chart in minutes.The tool behind that transformation was built by two engineers in three months. Seventy percent of its code was written by AI. And it is now used by more than 4,000 of OpenAI's roug...