OpenAI releases open source coding tool 'Codex CLI'
On April 16, 2025, OpenAI released the coding agent tool ' Codex CLI ' that can be run directly from the terminal. OpenAI also makes Codex CLI available as open source.
Introducing OpenAI o3 and o4-mini | OpenAI
OpenAI Codex CLI – Getting Started | OpenAI Help Center
https://help.openai.com/en/articles/11096431-openai-codex-cli-getting-started
OpenAI debuts Codex CLI, an open source coding tool for terminals | TechCrunch
https://techcrunch.com/2025/04/16/openai-debuts-codex-cli-an-open-source-coding-tool-for-terminals/
OpenAI's newly released coding agent tool 'Codex CLI' uses large-scale language models 'o3' and 'o4-mini' announced on the same day to read files, create code, and execute code. Codex CLI can be run from the terminal, so it is possible to code locally.
Codex CLI supports multimodal input, so you can input not only text but also screenshots and images to generate or edit code accordingly. In the video below, you can see how Codex CLI is used to input a screenshot, and the command 'display webcam footage in various styles such as sepia and black and white' is used based on the image, resulting in the generation of the requested code. The relevant scene can be seen from around 3 minutes 38 seconds into the video.
OpenAI Codex CLI - YouTube
'Our goal is to provide users with a minimal interface to directly link AI models to code and tasks,' said an OpenAI spokesperson. In addition, to promote the use of Codex CLI, OpenAI has announced that it will provide up to $25,000 in API credits to developers of projects that use Codex CLI and OpenAI AI models.
Codex CLI is also open source and the source code can be viewed on GitHub. According to OpenAI, Codex CLI will also support GPT-4.1 in the future.
GitHub - openai/codex: Lightweight coding agent that runs in your terminal
https://github.com/openai/codex
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