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ChatGPT Codexv5.3Version updatev5.3Feb 5, 2026Faster inference aimed at improving the interactive loop while keeping high-end capability.
Combines frontier coding performance with stronger general reasoning and professional knowledge in one Codex model.
Better for long-running tasks that mix research, tool use, and complex execution.
More steerable while it works, so you can redirect mid-task without it dropping context.
Positioned as the new top recommended Codex model across Codex surfaces.
Overview
Codex is a sophisticated AI tool designed to streamline and enhance software engineering tasks. It operates in the cloud, making it highly accessible and reliable for different applications.
Codex functions as an engineering agent that can offer expert answers to codebase-related queries. Its capability is further extended to the execution of code, facilitating seamless development processes.
Codex also has the unique ability to draft pull requests, thereby assisting in successful version control and codebase management. This tool is integrated with the ChatGPT platform, a powerful AI technology that offers users the additional benefit of a conversational interface.
This allows users to interact with Codex more intuitively, exploring ideas and finding solutions at a faster pace. Codex is available to users enrolled in ChatGPT Plus, Pro, Business, Enterprise, and Edu plans.
Its capabilities to interact, understand, and respond to user needs intuitively make it a practical resource for modern software development processes.
Supported features
Releases
Combines frontier coding performance with stronger general reasoning and professional knowledge in one Codex model.
Better for long-running tasks that mix research, tool use, and complex execution.
More steerable while it works, so you can redirect mid-task without it dropping context.
Positioned as the new top recommended Codex model across Codex surfaces.
Pricing
AIs built with ChatGPT Codex
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