Thomas also released a statement to the website Warchant.com, re-affirming his commitment.
On Wednesday, Thomas' father said his son told him he had decided to stay with Florida State because he didn't want to sit out a season and give up one year of eligibility.
"I think sitting down with Jimbo Fisher made the difference," Billy Thomas said. "Florida State never stopped recruiting him. They told him, 'You're our guy.' Jimbo never backed down. They told him they would build him into a great football player and student.
"I asked him 'Are you sure?' And he said, 'I'm sure.'"
Thomas' father had said on Monday his son wanted to attend USC. Previously, Thomas had told the Miami Herald he wanted to switch his commitment from FSU to USC or Georgia.
Billy Thomas said the recruiting process could be overwhelming and confusing at times for the 17-year-old Matthew but that he's glad it's over. Billy Thomas said he has learned lessons that will help when Matthew's younger brother chooses a college.
At one point, the Thomas family did request a release from his Florida State scholarship, which the school would not do without a justifiable reason.
Thomas had said he felt pressured by his mother on national signing day because she would not sign his National Letter of Intent to attend USC.
All along, Florida State was maintaining hope that by continuing to communicate with Thomas that he would eventually decide to report.
Florida State can exhale a final breath if and when Thomas reports with his classmates, perhaps as early as this weekend.