By skyforbes 
Disclaimer: only used it for technical tasks as that’s my main use case with the 5 series. For any writing tasks I much more prefer either 4o or Gemini 3.
Official cookbook: https://cookbook.openai.com/examples/gpt-5/gpt-5-2_prompting_guide
Try it and thank me later. It even has a super handy prompt optimizer which I’ve been desperately searching for.