# OpenAI — How OpenAI Uses Codex to Accelerate Engineering

- Company: OpenAI (openai.com)
- Announced: 2026-01-14T21:27:09+00:00
- Category: not stated
- Coverage: not counted
- Announcement: no
- Group: routine
- Source: https://openai.com/business/guides-and-resources/how-openai-uses-codex
- Record: https://forck.live/items/18799-how-openai-uses-codex-to-accelerate-engineering
- Subject: GPT / ChatGPT / API

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.

## Evidence

Verbatim from https://openai.com/business/guides-and-resources/how-openai-uses-codex:

> 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.

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Record: https://forck.live/items/18799-how-openai-uses-codex-to-accelerate-engineering
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