OpenSpecFission AI
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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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OpenSpec:
About
OpenSpec is an open-source spec-driven development framework designed to bring structure and clarity to AI-assisted coding workflows. It introduces a lightweight specification layer that helps teams define requirements before writing code. The platform organizes each change into structured artifacts such as proposals, specifications, designs, and task lists. It integrates with over 20 AI coding tools, allowing developers to use their preferred assistants while maintaining consistency. OpenSpec emphasizes an iterative and flexible approach rather than rigid development phases. Its command-based workflow enables users to propose, implement, and archive features efficiently. Overall, OpenSpec helps developers align with AI systems, reduce ambiguity, and produce more predictable and reliable outcomes.
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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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OpenSpec:
Platforms Supported
Windows
Supported
Mac
Supported
Linux
Supported
Cloud
Not Supported
On-Premises
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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OpenSpec:
Audience
Developers, product teams, and organizations using AI coding assistants who want a structured, spec-driven approach to improve clarity, collaboration, and development outcomes
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OpenAI Codex:
Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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OpenSpec:
Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Not Supported
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OpenAI Codex:
API
Offers API
Supported
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OpenSpec:
API
Offers API
Not Supported
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OpenAI Codex:
Screenshots and Videos |
OpenSpec:
Screenshots and Videos |
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OpenAI Codex:
Pricing
$20/month
Free Version
Supported
Free Trial
Supported
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OpenSpec:
Pricing
Free
Open source
Free Version
Supported
Free Trial
Not Supported
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OpenAI Codex:
Reviews/
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OpenSpec:
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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OpenSpec:
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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OpenSpec:
Company InformationFission AI
openspec.dev/
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OpenAI Codex:
Alternatives |
OpenSpec:
Alternatives |
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OpenAI Codex:
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OpenSpec:
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OpenAI Codex:
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OpenSpec:
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OpenAI Codex:
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OpenSpec:
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OpenAI Codex:
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OpenSpec:
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OpenAI Codex:
Categories |
OpenSpec:
Categories |
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OpenAI Codex:
Integrations
Claude Code
Supported
Cursor
Supported
Devin Desktop
Supported
ChatGPT
Supported
ChatGPT Images 2.6
Supported
Code Guardian
Supported
GPT-3
Supported
GPT-5.2 Thinking
Supported
GPT-6.1 Sol
Supported
GPT‑Image‑2.6 Flare
Supported
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OpenSpec:
Integrations
Claude Code
Supported
Cursor
Supported
Devin Desktop
Supported
ChatGPT
Not Supported
ChatGPT Images 2.6
Not Supported
Code Guardian
Not Supported
GPT-3
Not Supported
GPT-5.2 Thinking
Not Supported
GPT-6.1 Sol
Not Supported
GPT‑Image‑2.6 Flare
Not Supported
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OpenAI Codex:
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OpenSpec:
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