Text modelsOpenAI

GPT Codex: model and API overview

GPT Codex is part of OpenAI's Codex family. This card is for a text workflow. It can handle coding, code analysis, and agentic development tasks. Consider it when you need repository work, code repair, or a multi-step engineering task. Input: Text, Images; output: Text.

External model reference page. This page does not confirm availability in Neiron.

Capabilities

GPT Codex: For text workflows, it can handle coding, code analysis, and agentic development tasks.

Input: Text, Images; output: Text.

Purpose: Language model; developer: OpenAI; region: United States.

Use cases

Choose it for a text workflow: GPT Codex, when you need repository work, code repair, or a multi-step engineering task.Compare GPT Codex with related Codex models if the task allows a different input or output format.Before starting, confirm the input format and expected result (text, code, or an implementation plan).

Reviewed facts

Developer

OpenAI

Purpose

Language model, Coding, Agentic workflows

Input

Text, Images

Output

Text

Geography

United States

Verified

2026-08-26

Benchmarks

No comparable benchmark is recorded in this card.

Sources

What to verify before use

Parameters, limits, licensing terms, and, where applicable, pricing for GPT Codex change over time. Check the official OpenAI documentation before integrating.

Expected result: text, code, or an implementation plan. For a different input or output, see neighboring Codex cards.

For comparison, give models the same context and instructions; check factual accuracy, format compliance, and reasoning quality on your task.

FAQ

What is GPT Codex?

What task is GPT Codex suited to?

Handle coding, code analysis, and agentic development tasks. Choose it when you need repository work, code repair, or a multi-step engineering task.

What does GPT Codex accept and return?

Reviewed input modalities: Text, Images. Output: Text. The record was checked on 2026-08-26.