Codex coding agent arrives in ChatGPT mobile apps for iPhone, iPad and Android

OpenAI said on May 14 that Codex is now available in preview inside the ChatGPT mobile app on iPhone, iPad and Android, extending its coding agent from desktop and web into phones and tablets. The company said users can start new work, review outputs, steer execution and approve next steps from mobile while Codex continues running on a laptop, Mac mini or managed remote environment. The rollout is live in all supported regions, according to OpenAI’s product post. Windows phone-to-Codex support is “coming soon,” the company said. ### What exactly changed in the mobile app? The May 14 product update adds a “fully-featured mobile experience” for Codex inside the ChatGPT app, OpenAI said. The company said the app can load the live state from any connected machine where Codex is running, including laptops, dedicated Mac minis and managed remote environments. (openai.com) From a phone, users can work across active threads, review outputs, approve commands, change models or start new tasks, according to OpenAI. The company said updates flow back to the handset in real time, including screenshots, terminal output, diffs, test results and approvals. ### Does the phone run the coding work itself? (openai.com) OpenAI said the coding work continues on the connected machine rather than on the phone itself. The company said files, credentials, permissions and local setup stay on the laptop, devbox or remote environment where Codex is operating, while the mobile app acts as the place to monitor and direct that work. (openai.com) That design is central to the pitch. OpenAI said the mobile app is meant to let users “stay in the loop from anywhere” while longer-running coding tasks continue elsewhere. ### Who gets access, and what controls are in place? Codex is included with ChatGPT Plus, Pro, Business, Edu and Enterprise plans, according to OpenAI’s Codex product materials. (openai.com) OpenAI introduced Codex in May 2025 for Pro, Business and Enterprise users, then said on June 3, 2025 that access expanded to Plus users. OpenAI’s help documentation says Enterprise and Edu administrators can use role-based access control to decide which users get access to the app or plugin. The same help page says those controls apply across ChatGPT web, Atlas, ChatGPT mobile and Codex, rather than being enabled for only one surface. (openai.com) ### Why is OpenAI emphasizing approvals and check-ins? OpenAI said the mobile release is aimed at the moments when a coding agent needs human input before continuing. In its announcement, the company said users may need to answer a question, review what Codex found, change direction, approve what comes next or add a new idea while an agent is working. (help.openai.com) “More than 4 million people now use Codex every week,” OpenAI said in the same post. The company said those “small moments” can keep a task moving and prevent unnecessary rework. ### How does this fit into OpenAI’s broader Codex rollout? OpenAI launched Codex as a cloud-based software engineering agent on May 16, 2025. (openai.com) The company later added internet access during task execution and expanded availability, then described a unified Codex experience across terminal, IDE, web, GitHub and ChatGPT surfaces. OpenAI’s changelog now points users to newer Codex model options inside the app and related tools, including GPT-5.3-Codex and GPT-5.5, showing that the company is continuing to update the product around the same account-based workflow. ### What comes next after this preview? OpenAI said the mobile feature is “rolling out today as a preview” on iOS and Android in all supported regions. (openai.com) The company also said support for connecting a phone to the Codex app on Windows is coming soon. OpenAI’s news page lists “Work with Codex from anywhere” under product releases dated May 14, 2026, and the company’s help and changelog pages continue to update access and model details as the rollout expands. (developers.openai.com) (openai.com) (community.openai.com)