by Maria Deutscher
OpenAI Group PBC today made its Codex programming assistant available on mobile devices.
The service is accessible through ChatGPT’s iOS and Android clients. It’s rolling out about eight months after Anthropic PBC made Claude Code, its competing programming assistant, available on handsets.
OpenAI says that the newly added mobile access can significantly speed up some software development tasks. Furthermore, it reduces inference costs in the process.
GPT-5.5, the large language model that powers Codex, can complete hours-long programming tasks. Such workflows occasionally require developers to provide the AI with guidance. If Codex identifies two different ways to rewrite a piece of legacy code, it might ask the user to specify which method should be applied. Developer input is also needed when the service requires permission to make a high-stake project change.
