From the source
OpenAI published a guide detailing how its own engineering teams use Codex for code understanding, refactoring, performance optimization, test coverage, and development velocity, based on interviews and internal usage data.
How OpenAI Uses Codex to Accelerate Engineering
Internal guide on Codex usage across OpenAI engineering teams
From the source
Codex is used daily across numerous technical teams at OpenAI like Security, Product Engineering, Frontend, API, Infrastructure, and Performance Engineering. Teams are using it to accelerate a range of engineering tasks, from understanding complex systems and refactoring large codebases to shipping new features and resolving incidents under tight deadlines.
openai.com