Introducing GPT-5.2-Codex

Today we’re releasing GPT‑5.2‑Codex, the most advanced agentic coding model yet for complex, real-world software engineering. GPT‑5.2‑Codex is a version of GPT‑5.2⁠ further optimized for agentic coding in Codex, including improvements on long-horizon work through context compaction, stronger performance on large code changes like refactors and migrations, improved performance in Windows environments, and significantly stronger cybersecurity capabilities.

As our models continue to advance along the intelligence frontier, we’ve observed that these improvements also translate to capability jumps in specialized domains such as cybersecurity⁠. For example, just last week, a security researcher using GPT‑5.1‑Codex‑Max with Codex CLI found and responsibly disclosed⁠(opens in a new window) a vulnerability in React that could lead to source code exposure.

GPT‑5.2‑Codex has stronger cybersecurity capabilities than any model we’ve released so far. These advances can help strengthen cybersecurity at scale, but they also raise new dual-use risks that require careful deployment. While GPT‑5.2‑Codex does not reach a ‘High’ level of cyber capability under our Preparedness Framework, we’re designing our deployment approach⁠ with future capability growth in mind.

We're releasing GPT‑5.2‑Codex today in all Codex surfaces for paid ChatGPT users, and working towards safely enabling access to GPT‑5.2‑Codex for API users in the coming weeks. In parallel, we’re piloting invite-only trusted access to upcoming capabilities and more permissive models for vetted professionals and organizations focused on defensive cybersecurity work. We believe that this approach to deployment will balance accessibility with safety.

Pushing the frontier on real-world software engineering

Stronger vision performance enables GPT‑5.2‑Codex to more accurately interpret screenshots, technical diagrams, charts, and UI surfaces shared during coding sessions.