This paper presents the development of an analytical model designed to accurately predict the compressive behaviour of Fiber Reinforced Polymer (FRP)-confined concrete cylinders under uniaxial compression. Existing models often show significant shortcomings in accurately predicting the ultimate strength, strain, and overall stress-strain behaviour of FRP-confined concrete, particularly under varying confinement levels. The proposed model builds upon the Spoelstra and Monti framework, introducing key modifications to address these limitations and enhance predictive accuracy. A central modification involves incorporating the Leon-Pramono failure surface model, which accurately represents peak stress behaviour under specific lateral confining pressures. Additionally, refinement to the axial stress-strain relationship enables accurate predictions across a wider range of confinement scenarios, including both Carbon Fiber Reinforced Polymer (CFRP) and Steel Fiber Reinforced Polymer (SFRP) confinements. By improving the precision of these predictions, the model provides a robust and reliable tool for structural design and analysis and makes a valuable contribution to advancing engineering practices.