MODEL LINEAGE
中文
Model index
OpenAI·GPT

GPT-5.2-Codex

A GPT-5.2 variant optimized for long-horizon software engineering, large code changes, Windows, and context compaction.

LegacyCodingAgentReasoningWeights not released
MODEL NUMBER057
First public date
2025-12-18
Organization
OpenAI
Family
GPT
01

Specifications

Only published specifications are shown.

Context
400,000 tokens↗
Maximum output
128,000 tokens↗
Input modalities
Text · Image
Open weights
No
Status
Legacy
02

Overview

Release dates

— GPT-5.2-Codex launched for long-horizon software engineering and defensive security. ↗

03

Architecture & capabilities

Model capabilities

Long-horizon agentCodingCybersecurity

API features

Context compaction
04

Release history

General release

GPT-5.2-Codex launched for long-horizon software engineering and defensive security.

View source
05

Related models

Select a card to view the related model.

Variant ofGPT-5.2View details →SuccessorGPT-5.3-CodexView details →
06

Sources

01
Introducing GPT-5.2-CodexOpenAI · Published 2025-12-18
Official · Verified02
OpenAI API model specificationsOpenAI · Checked 2026-09-07
Official · Verified
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