Tweet by martin_casado

February 11, 2026

I’m so impressed with 5.3 Codex. Well done to the @OpenAI team. I’d run into diminishing returns with 4.6 primarily on backend state management tracking which was becoming whack-a-mole of breaking shit when updating the schema and front end handlers. But 5.3 has been fantastic for sane architecture and separation of concerns.

Author
martin_casado
Date
February 11, 2026
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