# OpenAI Releases Addendum to GPT-5.2 System Card for Codex Variant

OpenAI has published an addendum to the GPT-5.2 System Card specifically addressing GPT-5.2-Codex, the coding-focused variant of their latest language model.

System cards are technical documents that detail a model's capabilities, limitations, and safety evaluations. This addendum suggests that the Codex version has distinct characteristics that warrant separate documentation from the base GPT-5.2 model.

While OpenAI's tweet doesn't specify the exact changes, addendums to system cards typically cover specialized performance metrics, unique safety considerations, or behavioral differences specific to that variant. For GPT-5.2-Codex, this likely includes code generation capabilities, programming language support, and potential security implications of AI-generated code.

This release matters for developers and organizations integrating Open