Cutting insert, cutting tool, and method of producing machined product using the same

A cutting insert, comprising:

• a first surface;
• a second surface;
• a side surface connected to each of the first surface and the second surface and sequentially comprising a first side surface, a corner side surface, and a second side surface;
• and
• an edge comprising,
• a first edge located at an intersecting part of the first surface and the first side surface and inclined toward the second surface as going away from the corner edge, and
• a corner edge located at an intersecting part of the first surface and the corner side surface;
• wherein the first surface sequentially comprises a first inclined surface and a second inclined surface, the first inclined surface being located along the edge and inclined toward the second surface as going inward from the edge at a first angle on a basis of a perpendicular plane perpendicular to a central axis extending between the first surface and the second surface, the second inclined surface being located more inward than the first inclined surface and inclined toward the second surface at a second angle different from the first angle on the basis of the perpendicular plane, and
• the inclined surface comprises a first region and a second region being located farther away from the corner edge than the first region,
• the first angle is smaller than the second angle at the first region, and
• the first angle is larger than the second angle at the second region.