GPT-5.1-CodexOpenAI
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Related Products
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About
CodeLazr is a web-based AI coding agent that edits your GitHub repos directly from the browser. No install, no cloning, no containers. Pick any OpenRouter model, including free ones, or bring your own API key. Every change is staged as a diff you review before it commits, auto-commits, or opens a pull request. CodeLazr is built to make cheap and free AI models reliable for real coding: automatic retries with a fallback chain of models, a second model that reviews each diff before commit, and detectors for the common ways weaker models fail. Includes built-in prompt templates for common tasks like fixing bugs, writing tests, refactoring, and writing docs. More than 1,400 test runs are published publicly on the CodeLazr stats page, failures included. Free plan with free models and no card required, Pro at $10 per month, or bring your own key to use it free forever.
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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
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
Developers, indie hackers, and vibe coders who want an AI coding agent without a subscription or local setup
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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
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 VideosNo images available
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Screenshots and Videos |
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Pricing
$10/month
Free Version
Free Trial
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Pricing
$1.25 per input
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 InformationCodeLazr
Founded: 2026
www.codelazr.com
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Company InformationOpenAI
Founded: 2015
United States
platform.openai.com/docs/models/gpt-5.1-codex
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Categories |
Categories |
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Integrations
GitHub
C#
ChatGPT Enterprise
ChatGPT Pro
Codex CLI
Codex Security
Elixir
F#
GPT-5.6 Luna
GPT-5.6 Sol
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Integrations
GitHub
C#
ChatGPT Enterprise
ChatGPT Pro
Codex CLI
Codex Security
Elixir
F#
GPT-5.6 Luna
GPT-5.6 Sol
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