If male and good size, we can rule out female by seeing the front end of the spider, specifically the two short pedipalps, the ones immediately left and right of the chelicerae(fangs). If it's a boy he might be mature and that can easily be seen with a photo of the palps.
@PidderPeets they're both post molt. Thank you so much for your help! I'm still a beginner and he is my first T, but he's been such a sweetie so I'm happy either way. Just kind of bummed that the males don't have as long of a life span.