# Building more with GPT-5.1-Codex-Max

DevFeed: [Building more with GPT-5.1-Codex-Max](<https://devfeed.tech/articles/building-more-with-gpt-5-1-codex-max-6416.md>)

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

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

Content type: release

Language: en

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

Topics: [codex](<https://devfeed.tech/topics/codex.md>), [agentic-coding](<https://devfeed.tech/topics/agentic-coding.md>), [Development](<https://devfeed.tech/topics/development.md>), [context window](<https://devfeed.tech/topics/context-window.md>), [long-context](<https://devfeed.tech/topics/long-context.md>), [Command-line interface](<https://devfeed.tech/topics/cli.md>), [ide](<https://devfeed.tech/topics/ide.md>), [Code review](<https://devfeed.tech/topics/code-review.md>), [debugging](<https://devfeed.tech/topics/debugging.md>), [Refactoring](<https://devfeed.tech/topics/refactoring.md>), [Front end](<https://devfeed.tech/topics/frontend.md>), [Windows](<https://devfeed.tech/topics/windows.md>)

Tags: [agentic-coding](<https://devfeed.tech/tags/agentic-coding.md>), [cli](<https://devfeed.tech/tags/cli.md>), [code-review](<https://devfeed.tech/tags/code-review.md>), [codex](<https://devfeed.tech/tags/codex.md>), [coding](<https://devfeed.tech/tags/coding.md>), [context-window](<https://devfeed.tech/tags/context-window.md>), [debugging](<https://devfeed.tech/tags/debugging.md>), [ide](<https://devfeed.tech/tags/ide.md>), [performance](<https://devfeed.tech/tags/performance.md>), [product](<https://devfeed.tech/tags/product.md>), [software-engineering](<https://devfeed.tech/tags/software-engineering.md>), [token-efficiency](<https://devfeed.tech/tags/token-efficiency.md>), [windows](<https://devfeed.tech/tags/windows.md>)

## AI overview

OpenAI introduces GPT-5.1-Codex-Max, an agentic coding model for Codex designed for long-running, project-scale software engineering. It operates across multiple context windows through compaction, improving refactoring, debugging, agent loops, reasoning, and token efficiency.

## Source excerpt

Introducing GPT-5.1-Codex-Max, a faster, more intelligent agentic coding model for Codex. The model is designed for long-running, project-scale work with enhanced reasoning and token efficiency.