This dataset contains 3D models, data, and python scripts for the cranial and mandibular retrodeformations of oviraptorosaurian theropod species Incisivosaurus gautheri, Citipati osmolskae, Khaan mckennai, and Conchoraptor gracilis (along with reconstructed cranial musculature and gape analyses) supporting the paper ‘Cranial muscle reconstructions quantify adaptation for high bite forces in Oviraptorosauria' published in Scientific Reports (Cranial muscle reconstructions quantify adaptation for high bite forces in Oviraptorosauria | Scientific Reports (nature.com). A single ZIP compressed folder contains two Blender (https://www.blender.org/) .blend files for each species. The Blender files named '[Genus]_cranial_muscles.blend' contain the cranial and mandibular retrodeformed models and final volumetric muscle reconstructions (along with the curve muscle origin-insertion paths and shrinkwrapped curves the final muscle volumes were derived from). The Blender files named '[Genus]_gape_analysis.blend' contain the cranial and mandibular retrodeformed models and the muscle origin-insertion cylinder connections (attached to an animated armature) used to estimate optimal and maximum gape angle. The .txt files named '[Genus]_gape_script.txt' are python scripts used to run the gape analyses for each species. The .txt files names '[Genus]_strain_values.txt' are the output strain values of each muscle cylinder during the gape analyses for each species. [Unzipped total size 1.74GB].