v3.25.4
Form N-1A Cover
Jun. 30, 2025
Prospectus [Line Items]  
Document Type 485BPOS
Amendment Flag false
Registrant Name AB CAP FUND, INC.
Entity Central Index Key 0000081443
Entity Investment Company Type N-1A
Document Period End Date Jun. 30, 2025
Prospectus Date Jan. 09, 2026