Audience

Software engineers and engineering organizations wanting a tool to generate, refactor and maintain code at scale, integrated into their existing development toolchain

About GPT-5.1-Codex

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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Pricing

Starting Price:
$1.25 per input
Free Version:
Free Version available.

Integrations

API:
Yes, GPT-5.1-Codex offers API access
See Integrations

Ratings/Reviews

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

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Company Information

OpenAI
Founded: 2015
United States
platform.openai.com/docs/models/gpt-5.1-codex

Videos and Screen Captures

GPT-5.1-Codex Screenshot 1
GPT-5.1-Codex Screenshot 1
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Product Details

Platforms Supported
Cloud
Training
Documentation
Support
Online

GPT-5.1-Codex Frequently Asked Questions

Q: What kinds of users and organization types does GPT-5.1-Codex work with?
Q: What languages does GPT-5.1-Codex support in their product?
Q: What kind of support options does GPT-5.1-Codex offer?
Q: What other applications or services does GPT-5.1-Codex integrate with?
Q: Does GPT-5.1-Codex have an API?
Q: What type of training does GPT-5.1-Codex provide?
Q: How much does GPT-5.1-Codex cost?

GPT-5.1-Codex Product Features