"They're getting real close," Thompson said about the defending Southeastern Conference champions. "I had a good talk with (the coaches), a good experience.
"It wasn't really recruiting," he said of Auburn's annual Big Cat event. "It was just bonding with the coaches and different teammates."
Thompson said defensive line coach Rodney Garner discussed the depth chart with him and told him that he could be a big part of Auburn's 2015 recruiting class.
"(Garner) doesn't say anything about starting," Thompson noted. "You have got to work for that. It's just hard work to get there."
The 6-3, 289-pound Thompson said Auburn is recruiting him the hardest right now, especially tight ends coach Scott Fountain.
"He's always checking up on me to make sure I'm doing all right," Thompson said. "He's just making sure I'll be okay, making sure my school work is on point."
That is good news to his mother, who accompanied her son to Big Cat Weekend and stresses the importance of education. "She just wants me to get my degree, that's the main thing about it," Thompson said. "She says when you go through those struggles, cherish everything."
Fountain also spent time recruiting the five-star's mother, who Thompson said "got a big smile" when discussing Auburn.
"(Fountain) was talking to her all day on the bus," Thompson noted. "He sat by her and talked to her. He didn't want us to leave."
Signing defensive tackles like Trenton Thompson is a high priority for Auburn's 2015 class.
Thompson said he and his mother share the same "board" for his top schools, and that Auburn is currently number two on his list behind Georgia.
"Her top three are Georgia, Auburn and Florida State," said Thompson, who added that he can't really say right now what the Tigers would have to do to overtake the Bulldogs on his list. "I'm just taking it one step at a time. I'm just weighing all my options."
Thompson said he will likely stretch his recruitment out until signing day in February.
"I want to get some of my teammates to get signed on," he said. "It's just not for me anymore. It's for everybody."