An insert of the present disclosure includes a base and a coating layer covering a surface of the base. The base includes a hard phase containing a carbonitride including Ti and a binder phase containing Co. The coating layer includes a first layer including a plurality of TiN particles at a position in contact with the base. In a cross section vertical to a surface of the base, the width of the TiN particles in a direction parallel to the surface of the base is 35 nm or less. A cutting tool of the present disclosure includes a holder extending from a first end to a second end and having a pocket on the first end side, and the insert positioned in the pocket positioned in pocket.