OpenAI Codex vs Windsurf: what developers actually say
Based on 2,049 opinions on Hacker News from developers who discussed these two, most of them first-hand users.
OpenAI Codex comes out ahead. It has 2,013 opinions from 1,386 authors at 69% approval, against 36 opinions from 35 authors at 58% for Windsurf, and the one explicit head-to-head pick went to Codex. Codex aspect counts favor code quality (343 positive to 116 negative), cost (174 to 54), and autonomy (169 to 46), while reliability is its weak spot (112 to 127); Windsurf's reliability count is 0 positive to 3 negative. Windsurf is the better fit for developers who want an AI IDE, free tab completion, and a $20 plan with broad model access, though its 36-opinion sample is thin.
When developers explicitly said they prefer one or switched: 1 picked OpenAI Codex, 0 picked Windsurf.
Choose OpenAI Codex if
- Want a terminal agent with a large opinion base
- Care most about code quality, cost, and autonomy
- Can work within quota limits and uneven reliability reports
Choose Windsurf if
- Want an AI IDE rather than a terminal agent
- Value free tab completion and a $20 plan with broad model access
- Accept a thin 36-opinion evidence base
Where each one wins and loses
Why developers switched
Picked OpenAI Codex
Picked Windsurf
No explicit switches recorded.
Summaries are paraphrased. Each links to the original comment.