Can the new GPT-5-Codex replace GPT-5-high?
GPT-5-Codex vs. GPT-5-high: both have unique strengths. Codex excels with clear, structured tasks; High handles ambiguity. Ideal use cases for each.
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Can the new GPT-5-Codex replace GPT-5-high?
The answer is: No, it cannot!
After using both models intensively for two consecutive days, my biggest takeaway is that each has its own strengths, and it's not necessarily a matter of one replacing the other.
For my daily work development, I still use GPT-5-high, but for task organization or project planning, I use GPT-5-Codex.
GPT-5-high can often understand your intentions even when you give it a relatively vague requirement. It fills in the details you didn't explicitly mention and can guess what you want.
