OpenAI rolls out GPT‑5 Codex: New features, availability, and who can use it

OpenAI has introduced GPT-5 Codex, the latest iteration of its AI tailored for software development. This new model enhances the coding process by assisting developers in writing, debugging, and reviewing code more efficiently, whether by collaborating directly with users or autonomously tackling complex tasks. Sam Altman, CEO of OpenAI, highlighted the initial success of the Codex model with a tweet stating that GPT-5 Codex accounted for approximately 40% of the traffic on Codex, a figure expected to grow significantly throughout the day. The capabilities of GPT-5 Codex are extensive, allowing it to manage various programming tasks, from initiating projects to incorporating new features, resolving bugs, and assessing the quality of existing code. Notably, this AI can independently engage in lengthy projects for hours, refining its code until it achieves the desired functionality. For more straightforward tasks, it delivers responses swiftly, optimizing resource use. OpenAI's blog post indicates that the system has been trained to meticulously review code, identifying critical errors before they lead to potential issues. Tests conducted on popular open-source projects have shown that the suggestions made by GPT-5 Codex are significantly more accurate and beneficial, enabling developers to concentrate on the most pressing challenges. OpenAI has made GPT-5 Codex accessible through various platforms, including the Codex command-line tool, IDE extension, cloud services, GitHub, and even the ChatGPT iOS application. This versatility allows developers to navigate between different environments without losing context, enhancing collaboration and project management. Significant enhancements have also been made to Codex tools. The command-line interface now supports image attachments, progress tracking via to-do lists, and web searches among other features. The IDE extension provides a user-friendly interface designed for quicker coding and seamless transitions between tasks. GPT-5 Codex is available as part of the ChatGPT Plus, Pro, Business, Edu, and Enterprise plans, specifically tailored for coding tasks rather than general-use applications. This launch represents a significant advancement in AI-assisted coding, empowering developers to save time, minimize errors, and concentrate on producing superior software.