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Model Launch 1 min read

GPT-5.3-Codex System Card

Source: OpenAI Blog
February 5, 2026 · 7mo ago
Visual for GPT-5.3-Codex System Card

Summary

GPT‑5. 3-Codex is the most capable agentic coding model to date, combining the frontier coding performance of GPT‑5.

Why It Matters

New model releases reshape what developers can build. As capabilities advance, existing applications can be upgraded and entirely new use cases become feasible — making it critical for engineers to evaluate these releases early.

#agent

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