GPT-5.1-CodexOpenAI
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Related Products
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About
Codebuff is an AI-powered coding assistant that runs directly in the terminal, allowing developers to generate, edit, and manage codebases through natural language instructions without leaving their existing development environment. It functions as a coding agent that can read and understand an entire project structure, including files, dependencies, and patterns, enabling it to make precise, context-aware changes across multiple files rather than isolated edits. It uses a multi-agent system that coordinates specialized roles such as file selection, planning, editing, and validation to produce higher-quality outputs with fewer errors compared to single-model tools. Developers can simply describe tasks like adding features, fixing bugs, or refactoring code, and Codebuff automatically identifies relevant files, executes changes, runs terminal commands, installs dependencies, and verifies results through testing.
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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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Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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Audience
Software developers and engineering teams who want to automate coding, debugging, and refactoring tasks using an AI agent directly in their terminal
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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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Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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API
Offers API
Not Supported
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API
Offers API
Supported
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Screenshots and Videos |
Screenshots and Videos |
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Pricing
1¢ per credit
Free Version
Supported
Free Trial
Not Supported
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Pricing
$1.25 per input
Free Version
Supported
Free Trial
Not Supported
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Reviews/
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Reviews/
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Training
Documentation
Supported
Webinars
Not Supported
Live Online
Supported
In Person
Not Supported
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Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Company InformationCodebuff
United States
www.codebuff.com
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Company InformationOpenAI
Founded: 2015
United States
platform.openai.com/docs/models/gpt-5.1-codex
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Alternatives |
Alternatives |
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Categories |
Categories |
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Integrations
C
Not Supported
C#
Not Supported
ChatGPT Plus
Not Supported
ChatGPT Pro
Not Supported
Codex Security
Not Supported
Cursor
Not Supported
Devin Desktop
Not Supported
GPT-5.6 Luna
Not Supported
GPT-5.6 Terra
Not Supported
GPT-6 Luna
Not Supported
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Integrations
C
Supported
C#
Supported
ChatGPT Plus
Supported
ChatGPT Pro
Supported
Codex Security
Supported
Cursor
Supported
Devin Desktop
Supported
GPT-5.6 Luna
Supported
GPT-5.6 Terra
Supported
GPT-6 Luna
Supported
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