[OpenAI: GPT-5.3-Codex Officially Released] OpenAI founder Altman: GPT-5.3-Codex is here! It features the best coding performance, controllability during task execution, and real-time update capabilities. For the same task workload, it requires only half the tokens compared to 5.2-Codex, with single-token processing speed improved by over 25%. Additionally, it will efficiently utilize computer resources.