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Related Products
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OpenAI Codex:
About
Codex is an AI-powered coding agent from OpenAI designed to help developers build, manage, and ship software more efficiently across the entire development lifecycle. It acts as an intelligent pair programmer that can understand codebases, generate features, and deliver production-ready pull requests. Codex can safely execute commands in sandboxed environments while assisting with debugging, refactoring, and testing. A key advancement is its computer use capability, allowing it to operate your computer by seeing, clicking, and typing across applications. This enables Codex to interact with tools that don’t have APIs, making it useful for tasks like frontend testing and app navigation. The platform also includes an in-app browser and integrations with various developer tools for a more unified workflow. Codex supports automation by handling ongoing tasks such as monitoring, issue triage, and follow-ups.
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Reasonix:
About
Reasonix is an open source coding agent designed for long autonomous sessions that remain readable, auditable, and reversible. One local engine powers four interfaces: terminal, desktop app, browser, and ACP-compatible editors, with sessions, permissions, skills, and MCP servers shared across them. Plan mode holds every write until the proposed steps are reviewed and approved, while reads, writes, and shell commands are separately gated and constrained by a workspace sandbox. Each turn creates a checkpoint outside Git, allowing users to rewind a long run without affecting commit history. MCP support over stdio, SSE, and streamable HTTP merges external tools into one registry, while Markdown skills and isolated subagents extend the agent without requiring a fork. Reasonix maps a codebase once and keeps that map throughout the session, letting users queue tasks, review diffs, and resume work without losing context.
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OpenAI Codex:
Platforms Supported
Windows
Supported
Mac
Supported
Linux
Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Supported
iPad
Supported
Android
Supported
Chromebook
Not Supported
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Reasonix:
Platforms Supported
Windows
Supported
Mac
Supported
Linux
Supported
Cloud
Not Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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OpenAI Codex:
Audience
Codex is ideal for software developers, engineering teams, and tech organizations that want to automate coding tasks, leverage AI-driven workflows, and utilize computer-based automation to accelerate software development
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Reasonix:
Audience
Software developers and engineering teams wanting a tool to run long, auditable AI coding sessions, automate repository work, and extend agent capabilities across terminal, desktop, browser, and editor workflows
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OpenAI Codex:
Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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Reasonix:
Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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OpenAI Codex:
API
Offers API
Supported
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Reasonix:
API
Offers API
Not Supported
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OpenAI Codex:
Screenshots and Videos |
Reasonix:
Screenshots and Videos |
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OpenAI Codex:
Pricing
$20/month
Free Version
Supported
Free Trial
Supported
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Reasonix:
Pricing
Free
Free Version
Supported
Free Trial
Not Supported
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OpenAI Codex:
Reviews/
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Reasonix:
Reviews/
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OpenAI Codex:
Pros & Cons from Real UsersPros
Cons
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OpenAI Codex:
Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Reasonix:
Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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OpenAI Codex:
Company InformationOpenAI
Founded: 2015
United States
openai.com
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Reasonix:
Company InformationReasonix
China
reasonix.io
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OpenAI Codex:
Alternatives |
Reasonix:
Alternatives |
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OpenAI Codex:
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Reasonix:
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OpenAI Codex:
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Reasonix:
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OpenAI Codex:
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Reasonix:
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OpenAI Codex:
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Reasonix:
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OpenAI Codex:
Categories |
Reasonix:
Categories |
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OpenAI Codex:
Integrations
C#
Supported
Cosyra
Supported
GPT-5.1 Instant
Supported
GPT-5.1 Pro
Supported
GPT-5.1-Codex-Max
Supported
GPT-5.4
Supported
GPT‑5.4 Thinking
Supported
Google Calendar
Supported
Junction
Supported
Laguna XS 2.1
Supported
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Reasonix:
Integrations
C#
Not Supported
Cosyra
Not Supported
GPT-5.1 Instant
Not Supported
GPT-5.1 Pro
Not Supported
GPT-5.1-Codex-Max
Not Supported
GPT-5.4
Not Supported
GPT‑5.4 Thinking
Not Supported
Google Calendar
Not Supported
Junction
Not Supported
Laguna XS 2.1
Not Supported
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OpenAI Codex:
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Reasonix:
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