OpenAI Codex vs Windsurf

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

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OpenAI Codex and Windsurf land close in overall score, 21 versus 25, but AI assistants reach for them differently. Codex shows up in 22 of 70 answers, favored most for whole-codebase agents and terminal work, where it's named in 3 of 3 answers. Windsurf is named slightly more often, in 28 of 70 answers, and dominates the "top AI coding assistants" and "best AI code editor" questions with 4 of 4 each. Head-to-head, Windsurf comes out ahead in 8 questions versus Codex's 5, with 7 ties. By assistant, Codex scores highest with ChatGPT (37), while Windsurf's strongest backer is Gemini (54).

Head to head

metric	OpenAI Codex	Windsurf
score	22	21
questions won	18	15

By assistant

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

Windsurf

assistant	score	named in, this week	usual spot, this week
ChatGPT	12	20% of answers	#5.0
Claude	25	40% of answers	#6.1
Gemini	41	45% of answers	#5.4
Perplexity	16	11% of answers	#4.0

Where they differ

Only OpenAI Codex gets named for

What's the best AI coding assistant that works in the terminal?
Which AI coding assistant is best for large codebases?
What are the best alternatives to Windsurf?
What's the best AI coding assistant for a solo developer building a SaaS?
Which AI coding tool is best for writing tests?
What's the best open-source AI coding assistant?

Only Windsurf 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?

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