GPT-5.1-Codex-MaxOpenAI
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Related Products
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About
Agensi is a curated marketplace for AI agent skills. Every skill is security-scanned, works across 20+ agents (Claude Code, Codex CLI, Cursor, Gemini CLI, Copilot, and more), and comes from an accountable creator.
Skills are one-time purchases. Buy once, own forever. No subscriptions, no license keys. All skills use the open SKILL.md standard, so one purchase works across every compatible agent.
Every submission goes through an 8-point automated security scan covering prompt injection, data exfiltration, dangerous commands, secret detection, and obfuscated code. Creators keep 80% of each sale with instant Stripe payouts. Downloads are buyer-fingerprinted for IP protection.
Agensi also offers a MCP subscription ($9/month or $90/year) that gives AI agents live access to the full catalog. Your agent connects to Agensi via MCP, searches available skills, and loads the right one mid-conversation. No downloads, no file management. New skills are available the moment they go live.
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About
GPT-5.1-Codex-Max is the high-capability variant of the GPT-5.1-Codex series designed specifically for software engineering and agentic code workflows. It builds on the base GPT-5.1 architecture with a focus on long-horizon tasks such as full project generation, large-scale refactoring, and autonomous multi-step bug and test management. It introduces adaptive reasoning, meaning the system dynamically allocates more compute for complex problems and less for simpler ones, to improve efficiency and output quality. It also supports tool use (IDE-integrated workflows, version control, CI/CD pipelines) and offers higher fidelity in code review, debugging, and agentic behavior than general-purpose models. Alongside Max, there are lighter variants such as Codex-Mini for cost-sensitive or scale use-cases. The GPT-5.1-Codex family is available in developer previews, including via integrations like GitHub Copilot.
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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
AI agent skills, SKILL.md, AI agent marketplace, Claude Code skills, Codex CLI skills, Cursor rules, Gemini CLI skills, AI coding tools, AI developer tools, developer marketplace, code review AI, AI automation, cross-agent compatibility, AI creator economy, vibe coding, AI agent security, skill marketplace, AI plugins, GitHub Copilot skills, AI coding assistant
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Audience
Development teams and engineering organizations requiring a tool for generating, refactoring and maintaining large-scale codebases
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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
No information available.
Free Version
Free Trial
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Pricing
No information available.
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 InformationAgensi
Founded: 2026
Netherlands
www.agensi.io
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Company InformationOpenAI
Founded: 2015
United States
openai.com/index/gpt-5-1-codex-max/
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Categories |
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Integrations
Codex CLI
Cursor
GitHub Copilot
OpenAI Codex
C++
ChatGPT Enterprise
Claude Code
F#
GPT-5.2 Instant
GPT-5.2 Thinking
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Integrations
Codex CLI
Cursor
GitHub Copilot
OpenAI Codex
C++
ChatGPT Enterprise
Claude Code
F#
GPT-5.2 Instant
GPT-5.2 Thinking
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