He's about 2.5 weeks from his first birthday and he's finally growing up! He's nice and calm and has been "napping" on his bed for the last hour. Normally the moment you take him out of his kennel he is running around all crazy.
My pup didn't grow out of the puppy phase till she was 2. She still has a lot of her puppy tendencies. Since she's so tiny, we call her our perma-puppy. She has the same "i'm determined to not fall asleep" face as yours... then she's typically passed out asleep like 2 mins later lol!
It helped that he was at the PetsHotel over the weekend so he was still a bit tired from that. He still has his puppy behavior where he gets super excited and you can't calm him down. Like this morning when he gave me a black eye.