OpenAI Is Expanding Codex to ChatGPT Mobile App on iOS and Android

2:45 PM IST · May 15, 2026

OpenAI's pursuit of enterprise artificial intelligence (AI) market share has resulted in a shift of focus from ChatGPT to Codex. While the flagship AI app has received a couple of incremental updates, Codex has been aggressively upgraded and expanded by the team. In the last 30 days, the San Francisco-based AI giant upgraded the desktop app to support native computer use and web browsing, released the GPT-5.5-Cyber model, and added a secure sandboxing environment for Windows. Now, the company is expanding Codex to smartphones via the ChatGPT mobile app.

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