OpenAI launches GPT-5.3-Codex, topping SWE-Bench Pro and Terminal-Bench 2.0 charts at 25% faster speeds, with interactive steering across four languages. $1.75/M input, $14/M output.

OpenAI launches GPT-5.3-Codex, topping SWE-Bench Pro and Terminal-Bench 2.0 charts at 25% faster speeds, with interactive steering across four languages. $1.75/M input, $14/M output.

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