As of 2025, idol groups are organized into tier levels for male and female acts. For male idols, the tiers include: 0th tier BTS; 1st tier EXO and NCT; 1.5th tier SEVENTEEN and ENHYPEN; 2nd tier TheBoyz, Stray Kids, Tomorrow X Together (TXT); 3rd tier Treasure, ATEEZ, WINNER, and GD; followed by Cravity and Pentagon.

For female idols, the tiers are listed as: 1st tier BLACKPINK and aespa; 1.5th tier TWICE, IVE, Kep1er, and ITZY; 2nd tier StayC, Oh My Girl, Red Velvet, and I-DLE; 3rd tier Cosmic Girls (WJSN), LOONA, and Rocket Punch.