I love building with this model; it feels like more of a step forward than the benchmarks suggest.Also you can choose "pragmatic" or "friendly" for its personality; people have strong preferences one way or the other!Sam Altman (@sama):GPT-5.3-Codex is here!*Best coding performance (57% SWE-Bench Pro, 76% TerminalBench 2.0, 64% OSWorld).*Mid-task steerability and live updates during tasks.*Faster! Less than half the tokens of 5.2-Codex for same tasks, and >25% faster per token!*Good computer use. ...