Mars crashes into Earth, and new models go to war!
Just 15 minutes after Claude Opus 4.6 was released, OpenAI dropped their own latest and strongest coding model—
GPT-5.3-Codex.
The most immediate feeling is that this new model finally has some real aesthetic taste.
The official demos showcased two examples: a racing game and a diving game. They actually have quite a bit of style.
It’s said that GPT-5.3-Codex, with almost no human intervention, continuously iterated on these games, consuming millions of tokens in total.
