GitHub Copilot vs OpenAI Codex

as AI assistants see them, week of 2026-09-14

brag about it: X · LinkedIn

GitHub Copilot clearly leads here, named in 60 of 70 answers versus 22 of 70 for OpenAI Codex, and it scores higher overall too, 62 against 21. Copilot gets a perfect 4 of 4 mentions on questions like the best AI coding assistants of 2026, best value for money, and best for professional developers, while Codex's strongest showing is 3 of 3 on terminal-based coding assistants. Head-to-head, Copilot was named more often in 17 of 20 shared questions, Codex in just 1, with 2 ties. Both go unmentioned for local, privacy-focused coding assistants.

Head to head

metric	GitHub Copilot	OpenAI Codex
score	62	21
questions won	18	12

By assistant

GitHub Copilot

assistant	score	named in, this week	usual spot, this week
ChatGPT	65	90% of answers	#3.6
Claude	54	85% of answers	#4.9
Gemini	68	100% of answers	#4.1
Perplexity	68	75% of answers	#1.7

OpenAI Codex

assistant	score	named in, this week	usual spot, this week
ChatGPT	37	55% of answers	#4.2
Claude	30	45% of answers	#4.3
Gemini	0	0% of answers
Perplexity	8	10% of answers	#3.0

Where they differ

Only GitHub Copilot gets named for

What are the best free AI coding assistants?
What's the best AI coding assistant for beginners learning to code?
What's the best AI coding assistant for Python?
What's the best AI coding assistant for VS Code?
What's the best AI tool for writing and fixing React and Next.js code?
What's the best AI tool to review pull requests automatically?
What's the best open-source AI coding assistant?

Only OpenAI Codex gets named for

What's the best AI coding assistant that works in the terminal?

More comparisons

Not sold on either?

Scores count how often each assistant names a product, weighted by position. How the score works · Full AI coding assistants leaderboard