OpenAI Codex vs Antigravity: what developers actually say
Based on 2,314 opinions on Hacker News from developers who discussed these two, most of them first-hand users.
Codex comes out ahead overall: approval is 69 versus 45, and 63 versus 42 over the last 90 days, across 2,013 opinions versus 301. Explicit picks favor Codex 7 to 2. Codex leads on code quality (343 positive, 116 negative), autonomy (169 to 46), cost/pricing (174 to 54), and usage limits (131 to 61). Antigravity's clearest strength is speed (19 positive, 7 negative); its reliability (16 positive, 57 negative) and UX (11 positive, 29 negative) are weak, so it is the better pick when fast responses matter most.
When developers explicitly said they prefer one or switched: 7 picked OpenAI Codex, 2 picked Antigravity.
Choose OpenAI Codex if
- Want the stronger overall approval rating
- Value code quality, autonomy, or cost
- Need better reliability and looser usage limits
Choose Antigravity if
- Need faster responses
- Want a Google-backed IDE
- Can tolerate weaker reliability and tighter quotas
Where each one wins and loses
Why developers switched
Picked OpenAI Codex
Picked Antigravity
Summaries are paraphrased. Each links to the original comment.