diff --git a/crates/schema/public/enums/src/common/generation/common_model_class.rs b/crates/schema/public/enums/src/common/generation/common_model_class.rs
new file mode 100644
index 0000000000..3e4b19c13d
--- /dev/null
+++ b/crates/schema/public/enums/src/common/generation/common_model_class.rs
@@ -0,0 +1,217 @@
+use std::collections::BTreeSet;
+
+#[cfg(test)]
+use strum::EnumCount;
+#[cfg(test)]
+use strum::EnumIter;
+use utoipa::ToSchema;
+
+use crate::error::enum_error::EnumError;
+
+/// Maximum serialized string length for future database storage.
+pub const MAX_LENGTH: usize = 24;
+
+/// The broad class of model (image, video, audio, 3D, etc.)
+///
+/// NB: This is not currently stored in the database, so it does not need
+/// `impl_mysql_enum_coders!` or `impl_mysql_from_row!` macros. If it is
+/// stored in the future, add those macros and a migration.
+#[cfg_attr(test, derive(EnumIter, EnumCount))]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, Ord, PartialOrd, Serialize, Deserialize, ToSchema)]
+pub enum CommonModelClass {
+  #[serde(rename = "image")]
+  Image,
+
+  #[serde(rename = "video")]
+  Video,
+
+  #[serde(rename = "audio")]
+  Audio,
+
+  #[serde(rename = "audio_music")]
+  AudioMusic,
+
+  #[serde(rename = "audio_voice")]
+  AudioVoice,
+
+  #[serde(rename = "3d")]
+  Dimensional,
+
+  #[serde(rename = "3d_mesh")]
+  DimensionalMesh,
+
+  #[serde(rename = "3d_splat")]
+  DimensionalSplat,
+}
+
+impl_enum_display_and_debug_using_to_str!(CommonModelClass);
+
+impl CommonModelClass {
+  pub fn to_str(&self) -> &'static str {
+    match self {
+      Self::Image => "image",
+      Self::Video => "video",
+      Self::Audio => "audio",
+      Self::AudioMusic => "audio_music",
+      Self::AudioVoice => "audio_voice",
+      Self::Dimensional => "3d",
+      Self::DimensionalMesh => "3d_mesh",
+      Self::DimensionalSplat => "3d_splat",
+    }
+  }
+
+  pub fn from_str(value: &str) -> Result<Self, EnumError> {
+    match value {
+      "image" => Ok(Self::Image),
+      "video" => Ok(Self::Video),
+      "audio" => Ok(Self::Audio),
+      "audio_music" => Ok(Self::AudioMusic),
+      "audio_voice" => Ok(Self::AudioVoice),
+      "3d" => Ok(Self::Dimensional),
+      "3d_mesh" => Ok(Self::DimensionalMesh),
+      "3d_splat" => Ok(Self::DimensionalSplat),
+      _ => Err(EnumError::CouldNotConvertFromString(value.to_string())),
+    }
+  }
+
+  pub fn all_variants() -> BTreeSet<Self> {
+    BTreeSet::from([
+      Self::Image,
+      Self::Video,
+      Self::Audio,
+      Self::AudioMusic,
+      Self::AudioVoice,
+      Self::Dimensional,
+      Self::DimensionalMesh,
+      Self::DimensionalSplat,
+    ])
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use crate::common::generation::common_model_class::CommonModelClass;
+  use crate::common::generation::common_model_class::MAX_LENGTH;
+  use crate::test_helpers::assert_serialization;
+
+  mod explicit_checks {
+    use super::*;
+    use crate::error::enum_error::EnumError;
+
+    #[test]
+    fn test_serialization() {
+      assert_serialization(CommonModelClass::Image, "image");
+      assert_serialization(CommonModelClass::Video, "video");
+      assert_serialization(CommonModelClass::Audio, "audio");
+      assert_serialization(CommonModelClass::AudioMusic, "audio_music");
+      assert_serialization(CommonModelClass::AudioVoice, "audio_voice");
+      assert_serialization(CommonModelClass::Dimensional, "3d");
+      assert_serialization(CommonModelClass::DimensionalMesh, "3d_mesh");
+      assert_serialization(CommonModelClass::DimensionalSplat, "3d_splat");
+    }
+
+    #[test]
+    fn to_str() {
+      assert_eq!(CommonModelClass::Image.to_str(), "image");
+      assert_eq!(CommonModelClass::Video.to_str(), "video");
+      assert_eq!(CommonModelClass::Audio.to_str(), "audio");
+      assert_eq!(CommonModelClass::AudioMusic.to_str(), "audio_music");
+      assert_eq!(CommonModelClass::AudioVoice.to_str(), "audio_voice");
+      assert_eq!(CommonModelClass::Dimensional.to_str(), "3d");
+      assert_eq!(CommonModelClass::DimensionalMesh.to_str(), "3d_mesh");
+      assert_eq!(CommonModelClass::DimensionalSplat.to_str(), "3d_splat");
+    }
+
+    #[test]
+    fn from_str() {
+      assert_eq!(CommonModelClass::from_str("image").unwrap(), CommonModelClass::Image);
+      assert_eq!(CommonModelClass::from_str("video").unwrap(), CommonModelClass::Video);
+      assert_eq!(CommonModelClass::from_str("audio").unwrap(), CommonModelClass::Audio);
+      assert_eq!(CommonModelClass::from_str("audio_music").unwrap(), CommonModelClass::AudioMusic);
+      assert_eq!(CommonModelClass::from_str("audio_voice").unwrap(), CommonModelClass::AudioVoice);
+      assert_eq!(CommonModelClass::from_str("3d").unwrap(), CommonModelClass::Dimensional);
+      assert_eq!(CommonModelClass::from_str("3d_mesh").unwrap(), CommonModelClass::DimensionalMesh);
+      assert_eq!(CommonModelClass::from_str("3d_splat").unwrap(), CommonModelClass::DimensionalSplat);
+    }
+
+    #[test]
+    fn from_str_err() {
+      let result = CommonModelClass::from_str("invalid");
+      assert!(result.is_err());
+      if let Err(EnumError::CouldNotConvertFromString(value)) = result {
+        assert_eq!(value, "invalid");
+      } else {
+        panic!("Expected EnumError::CouldNotConvertFromString");
+      }
+    }
+
+    #[test]
+    fn all_variants() {
+      let mut variants = CommonModelClass::all_variants();
+      assert_eq!(variants.len(), 8);
+      assert_eq!(variants.pop_first(), Some(CommonModelClass::Image));
+      assert_eq!(variants.pop_first(), Some(CommonModelClass::Video));
+      assert_eq!(variants.pop_first(), Some(CommonModelClass::Audio));
+      assert_eq!(variants.pop_first(), Some(CommonModelClass::AudioMusic));
+      assert_eq!(variants.pop_first(), Some(CommonModelClass::AudioVoice));
+      assert_eq!(variants.pop_first(), Some(CommonModelClass::Dimensional));
+      assert_eq!(variants.pop_first(), Some(CommonModelClass::DimensionalMesh));
+      assert_eq!(variants.pop_first(), Some(CommonModelClass::DimensionalSplat));
+      assert_eq!(variants.pop_first(), None);
+    }
+  }
+
+  mod mechanical_checks {
+    use super::*;
+
+    #[test]
+    fn variant_length() {
+      use strum::IntoEnumIterator;
+      assert_eq!(CommonModelClass::all_variants().len(), CommonModelClass::iter().len());
+    }
+
+    #[test]
+    fn round_trip() {
+      for variant in CommonModelClass::all_variants() {
+        assert_eq!(variant, CommonModelClass::from_str(variant.to_str()).unwrap());
+        assert_eq!(variant, CommonModelClass::from_str(&format!("{}", variant)).unwrap());
+        assert_eq!(variant, CommonModelClass::from_str(&format!("{:?}", variant)).unwrap());
+      }
+    }
+
+    #[test]
+    fn serialized_length_ok_for_database() {
+      for variant in CommonModelClass::all_variants() {
+        let serialized = variant.to_str();
+        assert!(serialized.len() > 0, "variant {:?} is too short", variant);
+        assert!(serialized.len() <= MAX_LENGTH, "variant {:?} is too long", variant);
+      }
+    }
+
+    #[test]
+    fn serialized_names_must_not_contain_dots() {
+      for variant in CommonModelClass::all_variants() {
+        let to_str_value = variant.to_str();
+        assert!(!to_str_value.contains('.'), "to_str() for {:?} contains a dot: {:?}", variant, to_str_value);
+
+        let json_value = serde_json::to_string(&variant).unwrap().replace('"', "");
+        assert!(!json_value.contains('.'), "JSON serialization for {:?} contains a dot: {:?}", variant, json_value);
+      }
+    }
+
+    #[test]
+    fn serialized_names_must_only_contain_lowercase_alphanumeric_and_underscore() {
+      let valid_pattern = regex::Regex::new(r"^[a-z0-9_]+$").unwrap();
+
+      for variant in CommonModelClass::all_variants() {
+        let to_str_value = variant.to_str();
+        assert!(valid_pattern.is_match(to_str_value),
+          "to_str() for {:?} contains invalid characters: {:?} (only a-z, 0-9, _ allowed)", variant, to_str_value);
+
+        let json_value = serde_json::to_string(&variant).unwrap().replace('"', "");
+        assert!(valid_pattern.is_match(&json_value),
+          "JSON serialization for {:?} contains invalid characters: {:?} (only a-z, 0-9, _ allowed)", variant, json_value);
+      }
+    }
+  }
+}
diff --git a/crates/schema/public/enums/src/common/generation/mod.rs b/crates/schema/public/enums/src/common/generation/mod.rs
index 3105094ce7..1d8fa98dd3 100644
--- a/crates/schema/public/enums/src/common/generation/mod.rs
+++ b/crates/schema/public/enums/src/common/generation/mod.rs
@@ -4,3 +4,4 @@ pub mod common_splat_model;
 pub mod common_video_model;
 pub mod common_video_resolution;
 pub mod common_model_type;
+pub mod common_model_class;