Meet OpenAI's GPT-5.2-Codex for Developers

Unlock powerful coding capabilities with GPT-5.2-Codex.

Input: text · image Output: text Context: 400,000 tokens Release: 2026-01-14

OpenAI's GPT-5.2-Codex, released on January 14, 2026, is an advanced model tailored for software engineering and coding workflows. With a context length of 400,000 tokens, it supports both text and image inputs, producing text outputs. This model excels in interactive development and can handle complex engineering tasks independently. Key capabilities include project building, feature development, debugging, and structured code reviews. It integrates seamlessly into developer environments like IDEs and GitHub, adjusting its reasoning effort to provide quick responses for smaller tasks while maintaining efficiency for larger projects. GPT-5.2-Codex is designed to enhance coding productivity and quality, making it a valuable tool for developers.

Use Cases

Here are a few ways teams apply OpenAI: GPT-5.2-Codex in practice—from fast drafting to multimodal understanding. Adapt these ideas to your workflow.

Build projects from scratch efficiently

Develop and debug features seamlessly

Conduct thorough code reviews

Refactor large codebases effectively

Enhance UI development with multimodal inputs

Key Features

A quick look at the capabilities that make this model useful in real projects.

Optimized for software engineering tasks

Handles text and image inputs

Supports structured code reviews

Integrates with popular development tools

Adjusts reasoning effort dynamically

Specs

Overview

Vendor
openai

Model ID
openai/gpt-5.2-codex

Release
2026-01-14

Modalities & context

Input
text · image

Output
text

Context
400,000 tokens

Parameters & defaults

Supported parameters: include_reasoning, max_tokens, reasoning, response_format, seed, structured_outputs, tool_choice, tools

Defaults: temperature 0.2, top_p 0.95

Benchmark tests: OpenAI: GPT-5.2-Codex

We ran this model against a few representative prompts to show its range. Review the outputs below and be the judge.

Text

Prompt:

Write 150 words on how AI might positively upend work, leisure and creativity

AI could positively upend work, leisure, and creativity by automating routine tasks and expanding human potential. In workplaces, AI can handle repetitive data processing, scheduling, and basic analysis, allowing people to focus on strategic thinking, empathy-driven roles, and complex problem-solving. This shift may shorten workweeks and encourage more flexible, fulfilling careers. In leisure, AI can personalize learning, entertainment, and wellness, helping individuals discover new interests, plan adventures, or improve health habits. It could also lower barriers to entry for complex hobbies such as music composition, video editing, or game design. Creativity may flourish as AI becomes a collaborator—generating ideas, drafting prototypes, or offering feedback—enabling artists, writers, and innovators to explore bolder concepts faster. Rather than replacing human imagination, AI can amplify it, turning more people into makers, explorers, and lifelong learners.

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up.end

/ˌəpˈend/

verb

To “upend” means to completely disrupt, overturn, or drastically change the established order or structure of something. It implies a significant shift or alteration that can potentially have far-reaching consequences. When something is upended, it is turned upside down or transformed in a way that challenges conventional norms or expectations. The term often carries a sense of innovation, transformation, and sometimes even a hint of upheaval, indicating that the changes are not just minor adjustments but rather a fundamental reimagining of the status quo.

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