releases.shpreview

5.3-Codex

GPT-5.3-Codex System Card

$npx -y @buildinternet/releases show rel_lSAxtb76442rbAU9MjBNJ

GPT‑5.3-Codex is the most capable agentic coding model to date, combining the frontier coding performance of GPT‑5.2-Codex with the reasoning and professional knowledge capabilities of GPT‑5.2.

Fetched April 7, 2026