5.3-Codex

Introducing GPT-5.3-Codex

February 5, 2026Product ReleasesView original ↗

$npx -y @buildinternet/releases show rel_cHjt_i1vbzvqpqvq3RVbW

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.

Fetched April 7, 2026