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What is GPT-5.2-Codex?

GPT-5.2-Codex is OpenAI’s most capable agentic coding model, engineered for professional software engineering and cybersecurity use cases. It builds on the strengths of GPT-5.2 while introducing optimizations for long-running coding sessions. The model excels at maintaining context across extended workflows using native context compaction. GPT-5.2-Codex performs reliably in large repositories and complex project structures. It achieves state-of-the-art results on SWE-Bench Pro and Terminal-Bench 2.0, reflecting strong real-world coding performance. Native Windows support improves reliability for cross-platform development. Enhanced vision capabilities allow the model to interpret design mocks, diagrams, and screenshots. GPT-5.2-Codex supports iterative development even when plans change or attempts fail. The model also shows substantial gains in defensive cybersecurity tasks. It can assist with vulnerability discovery and secure software development workflows. Additional safeguards are built in to address dual-use risks. GPT-5.2-Codex advances the frontier of agentic software engineering.

What is GPT-5.1-Codex?

GPT-5.1-Codex represents a sophisticated evolution of the GPT-5.1 framework, tailored specifically for coding and software development tasks that necessitate a degree of independence. This model shines in interactive programming scenarios as well as in the sustained execution of complex engineering endeavors, encompassing activities such as building applications from scratch, improving functionalities, debugging, performing comprehensive code refactoring, and conducting code reviews. It adeptly harnesses a variety of tools while merging seamlessly into development environments, modulating its reasoning skills according to the complexity of the tasks at hand; it swiftly resolves straightforward issues while allocating additional resources to more complex challenges. Users have noted that GPT-5.1-Codex consistently produces cleaner and higher-quality code compared to its general-purpose alternatives, demonstrating a better alignment with developer needs and a significant decrease in errors. Moreover, access to the model is provided via the Responses API rather than the typical chat API, and it includes distinct configurations such as a “mini” version for those on a budget and a “max” variant that offers the highest level of performance. This specialized iteration is designed not only to improve productivity but also to significantly enhance efficiency in software development processes, ultimately leading to a smoother workflow for engineers. Its adaptability and targeted features make it a valuable asset in the fast-evolving landscape of software engineering.

Media

Media

Integrations Supported

C
C#
ChatGPT Enterprise
ChatGPT Plus
Codex CLI
F#
GitHub
Go
HTML
JavaScript
JetBrains Junie
Julia
Kotlin
Laravel
OpenAI Codex
PHP
R
SQL
Verdent
Visual Studio Code

Integrations Supported

C
C#
ChatGPT Enterprise
ChatGPT Plus
Codex CLI
F#
GitHub
Go
HTML
JavaScript
JetBrains Junie
Julia
Kotlin
Laravel
OpenAI Codex
PHP
R
SQL
Verdent
Visual Studio Code

API Availability

Has API

API Availability

Has API

Pricing Information

Pricing not provided.
Free Trial Offered?
Free Version

Pricing Information

$1.25 per input
Free Trial Offered?
Free Version

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

OpenAI

Date Founded

2015

Company Location

United States

Company Website

openai.com

Company Facts

Organization Name

OpenAI

Date Founded

2015

Company Location

United States

Company Website

platform.openai.com/docs/models/gpt-5.1-codex

Categories and Features

Categories and Features

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