No, he hasn't been saying that, despite what you may have read in a random reddit comment. In the 90s he was saying 3-5 years. In 2010 it was 1-2 years.
The first time any kind of claim measured in weeks was immediately before Rising Lion last year, and guess what, the IAEA agreed with him.
In 2015 he said weeks. I think we can agree a few weeks passed before that and bombing Iran ten years later.
https://youtube.com/shorts/jlqXOwYfpdQ?is=woFU_DlsW3Eb5NYd
I think we can agree that being weeks away from having enough fissile material for a nuke is different from being weeks away from having a nuke. Unless you think you just get your fissile material and then pop it in the next day