GPT-5.3 Codex merges the advanced coding capabilities of GPT-5.2 Codex with the reasoning and professional knowledge of GPT-5 ...
PCMag on MSN
OpenAI's newest GPT model helped to build itself
GPT-5.3-Codex is the first time the ChatGPT maker has found that its own models can be instrumental in its own development.
OpenAI’s GPT-5.3-Codex is 25 percent faster and requires less than half the tokens as its predecessor, 5.2-Codex.
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