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Codex 5.3

Codex 5.3

software Endorsed by 1 creator Visit website →

OpenAI's code generation AI model that Block uses for software development tasks.

Endorsed by

Owen Jennings

Topics

ai coding openai development

Used by

These creators have mentioned using this product

Owen Jennings uses
"You basically have Opus 4.6, you have Codex 5.3 and essentially you get this shift where the tools became incredibly capable working with existing complex code bases."
How to Reorg After AI Changes Everything | Block's Owen Jennings on the a16z ... · ▶ 3:07 · Apr 2026