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Model Launch 1 min read

Addendum to GPT-5 system card: GPT-5-Codex

Source: OpenAI Blog
September 15, 2025 · 12mo ago
Visual for Addendum to GPT-5 system card: GPT-5-Codex

Summary

This addendum to the GPT-5 system card shares a new model: GPT-5-Codex, a version of GPT-5 further optimized for agentic coding in Codex. GPT-5-Codex adjusts its thinking effort more dynamically...

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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