OpenAI Merges Codex Into ChatGPT Powered by GPT-5.6 Sol

OpenAI has merged its Codex tool into ChatGPT, creating a unified platform powered by the new GPT-5.6 Sol model, the company announced. The integration introduces a centralized workspace designed to streamline coding and collaboration for developers by combining natural language processing with coding tools. The GPT-5.6 Sol model features enhanced reasoning capabilities, an optional Ultra Mode for intricate tasks, and Automatic Task Distribution to break down large projects into manageable sub-tasks. New tools include Appshot, which captures application context to automate repetitive tasks, and the Sites Feature, which provides built-in hosting, authentication, and database support for simplified deployment. Browser enhancements offer faster interactions and support for login-based applications, while mobile upgrades enable task creation, code review, and SSH connections from mobile devices. Workflow management improvements include pull request management with inline comments and improved task organization across multiple projects. Contextual linking connects ChatGPT conversations with Codex projects, and the platform will evolve based on developer feedback.