---
type: Comparison
title: "GPT-5.2 Codex with AGENTS.md vs GPT-4: AI Coding Evolution"
description: Compare GPT-5.2 Codex with AGENTS.md support vs GPT-4. Agentic coding and project awareness.
resource: "https://www.contextstudios.ai/comparisons/gpt-5-2-codex-agents-md-vs-gpt-4"
category: provider
language: en
timestamp: "2026-02-20T08:40:04.471Z"
---

# GPT-5.2 Codex with AGENTS.md vs GPT-4: AI Coding Evolution

GPT-5.2 Codex with AGENTS.md understands project conventions and coding standards from repository config. GPT-4 lacks this project-aware context.

## Comparison Factors

| Factor | GPT-5.2-Codex (with AGENTS.md) | GPT-4 (without AGENTS.md) | Winner |
|--------|------|------|--------|
| Project Awareness | Reads AGENTS.md for conventions and preferences | No project-level configuration awareness | a |
| Code Quality | 75 percent plus SWE-bench, superior code generation | Around 50 percent SWE-bench, decent coding | a |
| Agentic Capabilities | Multi-step tool use, file editing, terminal | Basic function calling, no persistent tool use | a |
| Cost | Premium pricing for Codex tier | Lower cost, well-established | b |
| Maturity | Newer, rapidly evolving | Battle-tested, predictable | b |

## Key Statistics

- AGENTS.md adoption growing rapidly across open-source
- GPT-5.2 Codex: 75 percent SWE-bench vs GPT-4: 50 percent

## Choose GPT-5.2-Codex (with AGENTS.md) When

- Need a generational leap in coding capabilities.
- Focus on agentic coding tasks.
- Prefer automated context management.

## Choose GPT-4 (without AGENTS.md) When

- Prefer manual context management.
- Focus on simpler coding tasks.
- Need flexibility in coding sessions.

## Verdict

GPT-5.2 Codex with AGENTS.md is a generational leap for agentic coding. GPT-4 requires manual context each session. For coding agents, GPT-5.2 Codex is the clear choice.

Keywords: gpt-5 codex agents.md, gpt-5 vs gpt-4 coding, agents.md ai coding