diff --git a/packages/sdk/js/src/v2/gen/types.gen.ts b/packages/sdk/js/src/v2/gen/types.gen.ts
index e992b27bd5..0556e1ad94 100644
--- a/packages/sdk/js/src/v2/gen/types.gen.ts
+++ b/packages/sdk/js/src/v2/gen/types.gen.ts
@@ -1371,6 +1371,10 @@ export type PermissionConfig =
 
 export type AgentConfig = {
   model?: string
+  /**
+   * Default model variant for this agent (applies only when using the agent's configured model).
+   */
+  variant?: string
   temperature?: number
   top_p?: number
   prompt?: string
@@ -2136,6 +2140,7 @@ export type Agent = {
     modelID: string
     providerID: string
   }
+  variant?: string
   prompt?: string
   options: {
     [key: string]: unknown
diff --git a/packages/sdk/openapi.json b/packages/sdk/openapi.json
index f383ffbba8..95bca32303 100644
--- a/packages/sdk/openapi.json
+++ b/packages/sdk/openapi.json
@@ -9017,6 +9017,10 @@
           "model": {
             "type": "string"
           },
+          "variant": {
+            "description": "Default model variant for this agent (applies only when using the agent's configured model).",
+            "type": "string"
+          },
           "temperature": {
             "type": "number"
           },
@@ -10842,6 +10846,9 @@
             },
             "required": ["modelID", "providerID"]
           },
+          "variant": {
+            "type": "string"
+          },
           "prompt": {
             "type": "string"
           },