Another 3-4 weeks, maybe even 5.
When there are 98-99% brown pistils/hairs, you will be entering the harvest zone.
At this stage, they still have a lot more growing and maturation still ahead of them.
I shoot for an 8 week flowering period regardless of the plant auto or photo. Some strains take longer than 8 weeks to flower. So if it took 5 weeks of veg, add an other 8 weeks on top.
Hey, some faster autos take around 10 weeks, but most between 12 and 13.
Sometimes longer.
You are still very early in flower and still have a while to go.