GitHub Copilot vs OpenAI Codex

as AI assistants see them, week of 2026-10-12

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	22
questions won	21	18

By assistant

GitHub Copilot

assistant	score	named in, this week	usual spot, this week
ChatGPT	66	85% of answers	#2.8
Claude	56	85% of answers	#4.2
Gemini	63	82% of answers	#3.9
Perplexity	67	79% of answers	#2.3

OpenAI Codex

assistant	score	named in, this week	usual spot, this week
ChatGPT	39	55% of answers	#3.5
Claude	29	40% of answers	#4.4
Gemini	0	0% of answers
Perplexity	12	21% 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 Python?
What's the best AI coding assistant for VS Code?
What's the best AI coding assistant for beginners learning to code?
What's the best AI tool to review pull requests automatically?
What's the best AI coding assistant for building mobile apps?

Only OpenAI Codex gets named for

What's the best AI coding assistant that works in the terminal?
What are the best alternatives to GitHub Copilot?
What's the best open-source AI coding assistant?

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