# GPT-5.1-Codex-Max System Card

DevFeed: [GPT-5.1-Codex-Max System Card](<https://devfeed.tech/articles/gpt-5-1-codex-max-system-card-6417.md>)

Original publisher: [Read original article](<https://openai.com/index/gpt-5-1-codex-max-system-card>)

Published: 2025-11-19T00:00:00Z

Content type: article

Language: en

Sources: [OpenAI News](<https://devfeed.tech/sources/openai-news.md>)

Topics: [agentic-coding](<https://devfeed.tech/topics/agentic-coding.md>), [Artificial Intelligence](<https://devfeed.tech/topics/ai.md>), [coding](<https://devfeed.tech/topics/coding.md>), [computer-use](<https://devfeed.tech/topics/computer-use.md>), [Cybersecurity](<https://devfeed.tech/topics/cybersecurity.md>), [Software Engineering](<https://devfeed.tech/topics/software-engineering.md>), [Code review](<https://devfeed.tech/topics/code-review.md>), [Front end](<https://devfeed.tech/topics/frontend.md>)

Tags: [agent](<https://devfeed.tech/tags/agent.md>), [agentic](<https://devfeed.tech/tags/agentic.md>), [agentic-coding](<https://devfeed.tech/tags/agentic-coding.md>), [ai](<https://devfeed.tech/tags/ai.md>), [code](<https://devfeed.tech/tags/code.md>), [codex](<https://devfeed.tech/tags/codex.md>), [computer-use](<https://devfeed.tech/tags/computer-use.md>), [cybersecurity](<https://devfeed.tech/tags/cybersecurity.md>), [engineering](<https://devfeed.tech/tags/engineering.md>), [gpt](<https://devfeed.tech/tags/gpt.md>), [model](<https://devfeed.tech/tags/model.md>), [publication](<https://devfeed.tech/tags/publication.md>), [software-engineering](<https://devfeed.tech/tags/software-engineering.md>)

## AI overview

The GPT-5.1-Codex-Max System Card describes a frontier agentic coding model trained on software engineering and other agentic tasks. It covers multi-context-window operation through compaction, safety training, prompt-injection mitigations, agent sandboxing, configurable network access, and evaluations of cybersecurity, biology, and AI self-improvement capabilities.

## Source excerpt

This system card outlines the comprehensive safety measures implemented for GPT-5.1-CodexMax. It details both model-level mitigations, such as specialized safety training for harmful tasks and prompt injections, and product-level mitigations like agent sandboxing and configurable network access.