GPT-5.1-CodexOpenAI
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GSD 2Open GSD
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Related Products
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About
GPT-5.1-Codex is a specialized version of the GPT-5.1 model built for software engineering and agentic coding workflows. It is optimized for both interactive development sessions and long-horizon, autonomous execution of complex engineering tasks, such as building projects from scratch, developing features, debugging, performing large-scale refactoring, and code review. It supports tool-use, integrates naturally with developer environments, and adapts reasoning effort dynamically, moving quickly on simple tasks while spending more time on deep ones. The model is described as producing cleaner and higher-quality code outputs compared to general models, with closer adherence to developer instructions and fewer hallucinations. GPT-5.1-Codex is available via the Responses API route (rather than a standard chat API) and comes in variants including “mini” for cost-sensitive usage and “max” for the highest capability.
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About
GSD 2 is an AI software development framework designed to help teams move from simple prompting to a more structured, repeatable engineering process. The framework supports AI-assisted development by organizing work around specifications, context, execution, validation, and review. Instead of relying on isolated prompts, GSD 2 helps developers create clearer workflows that guide AI agents through planning, implementation, and quality checks. It is built for teams that want AI coding tools to operate with better direction, stronger traceability, and fewer ambiguous handoffs. The framework can help reduce drift between intended requirements and generated code by emphasizing persistent artifacts and human oversight. GSD 2 gives software teams a more disciplined way to use AI agents in real development projects.
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Platforms Supported
Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook
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Platforms Supported
Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook
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Audience
Software engineers and engineering organizations wanting a tool to generate, refactor and maintain code at scale, integrated into their existing development toolchain
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Audience
GSD 2 is designed for software developers, engineering teams, AI agent builders, technical founders, and organizations that want a more structured framework for managing AI-assisted software development workflows
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Support
Phone Support
24/7 Live Support
Online
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Support
Phone Support
24/7 Live Support
Online
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API
Offers API
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API
Offers API
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Screenshots and Videos |
Screenshots and VideosNo images available
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Pricing
$1.25 per input
Free Version
Free Trial
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Pricing
Free
Free Version
Free Trial
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Reviews/
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Reviews/
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Training
Documentation
Webinars
Live Online
In Person
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Training
Documentation
Webinars
Live Online
In Person
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Company InformationOpenAI
Founded: 2015
United States
platform.openai.com/docs/models/gpt-5.1-codex
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Company InformationOpen GSD
Founded: 2026
github.com/gsd-build/gsd-2
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Categories |
Categories |
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Integrations
ChatGPT Enterprise
ChatGPT Pro
Cursor
Elixir
GitHub
GitHub Copilot
Go
HTML
Java
JavaScript
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Integrations
ChatGPT Enterprise
ChatGPT Pro
Cursor
Elixir
GitHub
GitHub Copilot
Go
HTML
Java
JavaScript
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