Codex: rapid growth, enterprise gains
OpenAI’s Codex is reporting rapid uptake — cited at about 3 million weekly users and roughly fivefold growth in three months — and is showing enterprise traction with customers like Goldman Sachs and State Farm using it in workflows. The team is also planning product segmentation into Basic and Advanced tiers and experimenting with app preview and scratchpad features to support heavier developer workflows. Users say Codex is helping unblock stalled projects even as some scale across multiple accounts despite rate limit changes. (x.com) (x.com) (x.com)
OpenAI says Codex has reached 3 million weekly active users as the company pushes the coding agent deeper into corporate software teams. (openai.com) The company disclosed the figure on April 8, 2026, alongside a broader enterprise update that said business customers now account for more than 40% of OpenAI revenue and could reach parity with consumer revenue by the end of 2026. The same post named Goldman Sachs, Philips, and State Farm as new Codex customers. (openai.com) Codex is OpenAI’s software engineering agent: a tool that can read a codebase, write features, fix bugs, run tests, and propose pull requests inside an isolated cloud environment. OpenAI launched it in research preview on May 16, 2025 for ChatGPT Pro, Business, and Enterprise users, then expanded it to Plus users on June 3, 2025. (openai.com) OpenAI has been widening the product around that core agent. Its Codex app, introduced on February 2, 2026 for macOS and updated on March 4, 2026 for Windows, is built to manage multiple agents at once and run work in parallel across projects. (openai.com) The company’s current product pages describe the app as a “command center” with built-in worktrees, cloud environments, Git support, and automations for background tasks like issue triage, alert monitoring, and continuous integration and delivery. OpenAI also says Codex is included across ChatGPT Plus, Pro, Business, Edu, and Enterprise plans. (openai.com) (developers.openai.com) Pricing has shifted as adoption has grown. On April 2, 2026, OpenAI added pay-as-you-go pricing for ChatGPT Business and Enterprise teams, and its help documentation says those workspaces can now assign either a standard ChatGPT seat or a Codex-only seat. (openai.com) (help.openai.com) OpenAI is also turning Codex into a security product. On March 6, 2026, the company began rolling out Codex Security in research preview to Pro, Enterprise, Business, and Edu customers, positioning it as an agent that analyzes repositories for vulnerabilities and validates findings before surfacing them. (openai.com) Under the hood, OpenAI has kept updating the models that power the tool. The company introduced GPT-5.3-Codex on February 5, 2026, then said GPT-5.4 would bring native computer-use capabilities into Codex and the application programming interface, letting agents operate software across longer workflows. (openai.com 1) (openai.com 2) The near-term test is whether that usage turns into steady workplace habits. OpenAI’s own pitch is now less about one-off code generation and more about parallel agents, background automations, and paid enterprise deployment inside companies that already run large engineering organizations. (openai.com 1) (openai.com 2)
