GPT-5.3-Codex Released
OpenAI drops GPT-5.3-Codex 15 mins after Claude Opus 4.6 with SOTA coding, self-accelerating training & maxed computer use.
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.
