---
type: "Evidence Item"
title: "Introducing GPT-5.2-Codex"
description: "GPT-5.2-Codex is OpenAI’s most advanced coding model, offering long-horizon reasoning, large-scale code transformations, and enhanced cybersecurity capabilities."
resource: "https://openai.com/index/introducing-gpt-5-2-codex"
tags: ["appendix-iii", "benchmark", "openai"]
timestamp: "2025-12-18"
category: "benchmark"
publisher: "OpenAI"
cope_score: 96
confidence: 0.9
---

# Introducing GPT-5.2-Codex

# Claim

GPT-5.2-Codex is OpenAI’s most advanced coding model, offering long-horizon reasoning, large-scale code transformations, and enhanced cybersecurity capabilities.

# Relevance

Appendix III, section one: model and benchmark capability evidence

# Oracle Verdict

OpenAI is describing a frontier or production capability that pushes directly on the thesis. The important signal is not the marketing language; it is the widening set of tasks now being routed through model-driven execution rather than ordinary software or headcount.

# Metadata

* Publisher: OpenAI
* Category: benchmark
* Sector: Software engineering
* Capability: Frontier model release and benchmark movement
* Cope score: 96
* Confidence: 0.9

# Related Concepts

* [Live evidence index](index.md)
* [Thesis](../thesis.md)

# Citations

[1] [Introducing GPT-5.2-Codex](https://openai.com/index/introducing-gpt-5-2-codex)