JetBrains AI Assistant vs OpenAI Codex

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

brag about it: X · LinkedIn

OpenAI Codex comes out ahead overall, scoring 22 versus JetBrains AI Assistant's 11, and it's named more often too: 35 of 89 answers compared to 21 of 89. Head-to-head, Codex wins in 12 questions, JetBrains AI Assistant in 4, with 9 ties. Codex leads with ChatGPT (39) and Claude (29), while JetBrains AI Assistant does better with Gemini (22) but scores just 3 with Perplexity and 0 for Codex there. JetBrains AI Assistant shows up in all 3 answers for best Python assistant, while Codex sweeps all 3 answers for best AI coding agents across a whole codebase.

Head to head

metric	JetBrains AI Assistant	OpenAI Codex
score	11	22
questions won	13	18

By assistant

JetBrains AI Assistant

assistant	score	named in, this week	usual spot, this week
ChatGPT	12	15% of answers	#8.0
Claude	12	20% of answers	#8.0
Gemini	22	55% of answers	#5.8
Perplexity	3	5% of answers	#4.0

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 JetBrains AI Assistant gets named for

What's the best AI coding assistant for Python?

Only OpenAI Codex gets named for

What are the best AI coding agents that can work across a whole codebase?
What's the best AI coding assistant that works in the terminal?
Which AI coding assistant is best for large codebases?
What's the best AI tool for writing and fixing React and Next.js code?
Which AI coding assistant gives the best value for the money?
What's the best AI coding assistant for a solo developer building a SaaS?

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