Yes
Overall, Codex was the clear winner today
boole1854 on Hacker News
In the thread “Building more with GPT-5.1-Codex-Max”
Helped: Codex was better at comprehensive planning and integrating new functionality.
Got in the way: Gemini hallucinated column names, ignored requirements, and added noisy comments.
… In its favor, it did produce a better version of a particular finance-related calculation function than Codex did. Overall, Codex was the clear winner today. Hallucinations and ignored requirements are big problems that are very annoying to deal with when they happen. …