---
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"
language: "en"
tags: ["GPT-5.2 Codex", "GPT-4 Codex", "AI coding", "SWE-bench", "OpenAI code models"]
generated:
  by: "process:contextstudios-md/1"
  at: "2026-10-08T20:56:56.590Z"
status: "stable"
---

# 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.

## Detailed Comparison

| Factor | GPT-5.2 Codex | GPT-4 Codex | Winner |
|--------|------|------|--------|
| Code Gen |  |  | GPT-5.2 Codex |
| Context |  |  | GPT-5.2 Codex |
| Reasoning |  |  | GPT-5.2 Codex |
| Cost |  |  | GPT-4 Codex |
| Ecosystem |  |  | GPT-5.2 Codex |

## Key Statistics

- **56.4% vs 23.1%** (2026)
- **400K vs 32K tokens** (2026)

## Choose GPT-5.2 Codex when...

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

## Choose GPT-4 Codex when...

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

## Our Recommendation

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