[OpenAI · openai.com](<https://openai.com/index/introducing-gpt-5-3-codex/>)

# Introducing GPT-5.3-Codex

GPT-5.3-Codex is a Codex-native agent that pairs frontier coding performance with general reasoning to support long-horizon, real-world technical work.

1. [New Releases · OpenAI](<https://curation.space/openai/new-releases>)