There will come a day when 50% of jobs are being done by AI, major decisions are being made by AI, we're all riding around in cars driven by AI, people are having romantic relationships with AI... and we'll STILL be debating whether what has been created is really AGI. AGI will forever be the next threshold, then the next, then the next until one day we'll realize that we passed the line years before.
To me, GPT-4 is an AGI: it knows how to cook, write code, make songs, navigate international tax law, write business plans, etc.
Could it be more intelligent? Sure. Is it a capable general intelligence? 100%.