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GPT-5-Codex just launched

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OpenAI recently announced the launch of its new model GPT-5-Codex which is the smartest agentic coding model as of now. In the charts, it's showing a significant improvement over other GPT-5 models.

This is how to update and use the new Codex.

I tried updating the Codex CLI, and got the latest model right away. I will be testing it heavily over the next few days by building complex projects, let's see how it goes.

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