According to our current understanding of physics, gravity is described by the theory of general relativity, which differs from the other fundamental forces (such as electromagnetism or the strong and weak nuclear forces) in terms of its theoretical framework. In general relativity, gravity is not mediated by a fundamental particle like the other forces.
In general relativity, gravity is explained as the curvature of spacetime caused by the presence of mass and energy. Massive objects, such as planets, stars, or black holes, create a curvature in the fabric of spacetime, and other objects move along paths determined by this curvature. The interaction between objects with mass and the resulting curvature of spacetime is what we perceive as the force of gravity.
In the realm of quantum physics, attempts have been made to reconcile general relativity with quantum mechanics, which describes the behavior of particles and forces at the smallest scales. However, a consistent quantum theory of gravity, often referred to as "quantum gravity," is still an area of active research, and there is no widely accepted framework or definitive understanding of the fundamental particles or mediators of gravity at this point.
It's worth noting that the search for a quantum theory of gravity and a better understanding of the nature of gravity at the fundamental level are ongoing areas of exploration in theoretical physics.