---
type: Comparison
title: "GPT-5.2 Codex vs GPT-4 Codex: AI Coding Comparison 2026"
description: "Compare GPT-5.2 Codex and GPT-4 Codex — benchmarks, context windows, and coding performance."
resource: "https://www.contextstudios.ai/comparisons/gpt-5-2-codex-vs-gpt-4-codex"
category: technology
language: en
timestamp: "2026-02-20T08:40:04.471Z"
---

# GPT-5.2 Codex vs GPT-4 Codex: AI Coding Comparison 2026

OpenAI's Codex evolved from GPT-4 (32K context) to GPT-5.2 (400K context, 56.4% SWE-bench Pro). This comparison covers code generation, reasoning, cost, and ecosystem.

## Comparison Factors

| Factor | GPT-5.2-Codex | Previous Codex Models (e.g., GPT-4-Codex) | Winner |
|--------|------|------|--------|
|  |  |  | a |
|  |  |  | a |
|  |  |  | a |
|  |  |  | b |
|  |  |  | a |

## Key Statistics

- 56.4% vs 23.1%
- 400K vs 32K tokens

## Choose GPT-5.2-Codex When

- Need extensive context for complex tasks.
- Focus on high-performance coding.
- Prefer the latest technology.

## Choose Previous Codex Models (e.g., GPT-4-Codex) When

- Budget constraints limit advanced features.
- Focus on simple coding tasks.
- Need a reliable solution.

## Verdict

GPT-5.2 Codex dominates with 400K context and 56.4% SWE-bench Pro. GPT-4 Codex suits only budget-constrained simple tasks.

Keywords: GPT-5.2 Codex, GPT-4 Codex, AI coding, SWE-bench, OpenAI code models