OpenAI has introduced a new tool — the Codex agent , now available for ChatGPT Pro, Enterprise, and Team users. Codex is integrated into the ChatGPT web application and is positioned as a “virtual colleague” for engineers, capable of generating code from natural language descriptions, automatically finding and fixing errors, running tests, and suggesting changes to optimize software performance. The codex-1 model, on which the agent operates, is specifically adapted for programming tasks based on OpenAI o3 reasoning.
Codex currently does not have internet access — this decision was made to reduce security risks. The tool can perform tasks in the background for up to thirty minutes, and this limit is planned to be increased over time. Within the company, Codex already assists engineers in daily work — for example, as a “morning to-do list,” allowing multiple processes to be run in parallel and their results checked later.
The new agent has a special interface in ChatGPT — a “Codex” button has appeared, leading to a page for exploring the tool’s capabilities. Codex answers technical questions, executes code snippets, and creates draft pull requests — all of which make it a convenient assistant for developers within a familiar environment.
For now, Codex is available at no additional cost, but OpenAI plans to introduce a usage fee after assessing demand. It is expected that the tool will first appear in the desktop version of ChatGPT and later in web access for a wider range of users. OpenAI is also developing related products: the company recently opened the source code for Codex CLI — a terminal agent for local code execution, and previously announced the acquisition of the AI editor WindSurf.
