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GPT 5.1 Codex

GPT 5.1 Codex

By OpenAI
New Text Gen 7
Released: November 13, 2025

Overview

GPT 5.1 Codex is a code-focused variant that maps specs to working code, writes diffs and tests, and understands repositories with long context, tool calling, and strict JSON or patch output.

Description

This variant is tuned for software workflows. It plans changes, searches a repo, and produces reviewable artifacts like unified diffs, migrations, and test suites instead of free-form prose. It follows instructions closely, keeps multi-file dependencies straight, and calls tools like linters, test runners, or build scripts in loop. Outputs can be schema-true JSON, patches, or step plans that CI can consume. It is well suited for IDE copilots, refactors, doc sync, and policy-aware automation where format and reliability matter.

About OpenAI

OpenAI is a technology company that specializes in artificial intelligence research and innovation.

Industry: Research Services
Company Size: 5000-5500
Location: San Francisco, California, US
Website: openai.com
View Company Profile

Tools using GPT 5.1 Codex

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Last updated: November 17, 2025
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