diff --git a/components/schemas/infrastructure/providers/models/ProviderServerModel.yml b/components/schemas/infrastructure/providers/models/ProviderServerModel.yml
index ffa27dfa..5db90def 100644
--- a/components/schemas/infrastructure/providers/models/ProviderServerModel.yml
+++ b/components/schemas/infrastructure/providers/models/ProviderServerModel.yml
@@ -20,6 +20,13 @@ properties:
   description:
     type: string
     description: A description of the server.
+  drivers:
+    description: A list of drivers supported by the server.
+    type:
+      - "array"
+      - "null"
+    items:
+      type: string
   specs:
     $ref: ProviderServerModelSpec.yml
   provider:
diff --git a/components/schemas/infrastructure/providers/models/ProviderServerModelProviderSpec.yml b/components/schemas/infrastructure/providers/models/ProviderServerModelProviderSpec.yml
index 5a62de81..1224e6dc 100644
--- a/components/schemas/infrastructure/providers/models/ProviderServerModelProviderSpec.yml
+++ b/components/schemas/infrastructure/providers/models/ProviderServerModelProviderSpec.yml
@@ -2,7 +2,7 @@ title: ProviderServerModelProviderSpec
 type: object
 description: Higher level information about a providers server.
 required:
-  - identifier
+  - vendor
   - category
   - model
   - locations
@@ -10,9 +10,6 @@ properties:
   vendor:
     type: string
     description: The infrastructure vendor for the provider.
-  identifier:
-    type: string
-    description: A provider identifier.
   integration_id:
     anyOf:
       - $ref: "../../../ID.yml"
@@ -23,6 +20,14 @@ properties:
   class:
     type: string
     description: A class for the server.
+  parent_model_id:
+    description: >-
+      Set when this model is a variant of another model. Variants share the
+      same server object as their parent and are excluded from the default
+      models list; fetch them by parent when a variant group is expanded.
+    anyOf:
+      - $ref: "../../../ID.yml"
+      - type: "null"
   model:
     type: string
     description: The model of the server.
diff --git a/ial/components/schemas/provider/model/ServerModelProvider.yml b/ial/components/schemas/provider/model/ServerModelProvider.yml
index f498852f..2233c162 100644
--- a/ial/components/schemas/provider/model/ServerModelProvider.yml
+++ b/ial/components/schemas/provider/model/ServerModelProvider.yml
@@ -2,13 +2,9 @@ title: "ServerModelProvider"
 type: object
 description: "Identifies the provider details, including the category, class, model ID, parent model ID, available locations, availability zones, and stock for a server, plan, or model."
 required:
-  - name
   - category
   - model_id
 properties:
-  name:
-    type: string
-    description: The name of the server model.
   category:
     type: string
     description: "The category of the server model."
@@ -24,7 +20,7 @@ properties:
     type:
       - "string"
       - "null"
-    description: "The ID of the parent server model, if this model is derived from another."
+    description: "The ID of the parent server model, if this model is derived from another. Variants share the same server object as their parent and are excluded from the default models list; fetch them by parent when a variant group is expanded. Null for standalone and parent models."
   locations:
     type:
       - "array"