Codex is an artificial intelligence tool developed by OpenAI that is designed to help developers write code more efficiently and effectively. Using advanced machine learning and natural language processing algorithms, Codex is able to understand the intent and context behind code, and provide suggestions and autocomplete features to speed up the coding process.

In simpler terms, Codex is like having a coding assistant that can help you write code faster and with fewer errors. It's particularly useful for beginners who may not have a lot of experience with coding, as it can help to simplify the coding process and make it more accessible. Codex supports a wide range of programming languages and syntaxes, so it can be used for a variety of applications, from software development to data analysis and more.

Overall, Codex is an exciting new tool that is changing the way developers write code, and has the potential to make coding more accessible and easier for everyone.