# OpenAI Codex: how AI models rank it, September 2026

IT AI Recommendation Index, September 2026 Edition. Named in 4 judge labels across 1 categories by 3 of 12 models. Page: https://it-ai-index.com/vendors/openai-codex/

## Standing by category

| Category | Share | Rank | Negative rate | Labels |
|---|---|---|---|---|
| AI coding assistants | 0% | 27 | 25% | 4 |

## What the models said for it

- "Best for reasoning through hard code problems: Claude Code or ChatGPT/Codex" (GPT-5.4 mini, AI coding)

## And against it

- "Avoid: Free tiers of Copilot/Windsurf for proprietary code" (DeepSeek V4 Flash, AI coding)

## Record

- Method: https://it-ai-index.com/methodology/
- Raw judge labels and full responses: https://it-ai-index.com/data/
- License: CC BY 4.0. Cite as IT AI Recommendation Index, September 2026 Edition, it-ai-index.com.