diff --git a/app/schema.graphql b/app/schema.graphql
index c73ca07cd0..d5252b62b8 100644
--- a/app/schema.graphql
+++ b/app/schema.graphql
@@ -936,6 +936,7 @@ input InvocationParameters {
   stop: [String!]
   seed: Int
   toolChoice: JSON
+  responseFormat: JSON
 }
 
 """
diff --git a/app/src/pages/playground/__generated__/PlaygroundOutputSubscription.graphql.ts b/app/src/pages/playground/__generated__/PlaygroundOutputSubscription.graphql.ts
index ccd5b858e9..80f91d0133 100644
--- a/app/src/pages/playground/__generated__/PlaygroundOutputSubscription.graphql.ts
+++ b/app/src/pages/playground/__generated__/PlaygroundOutputSubscription.graphql.ts
@@ -1,5 +1,5 @@
 /**
- * @generated SignedSource<<ba65ab9fe3de490faf7a710506a23cc8>>
+ * @generated SignedSource<<c49a7b49268fb4184a1048df6c4a12f9>>
  * @lightSyntaxTransform
  * @nogrep
  */
@@ -27,6 +27,7 @@ export type GenerativeModelInput = {
 export type InvocationParameters = {
   maxCompletionTokens?: number | null;
   maxTokens?: number | null;
+  responseFormat?: any | null;
   seed?: number | null;
   stop?: ReadonlyArray<string> | null;
   temperature?: number | null;
diff --git a/src/phoenix/server/api/input_types/InvocationParameters.py b/src/phoenix/server/api/input_types/InvocationParameters.py
index ea1164ec59..dc00292553 100644
--- a/src/phoenix/server/api/input_types/InvocationParameters.py
+++ b/src/phoenix/server/api/input_types/InvocationParameters.py
@@ -18,3 +18,4 @@ class InvocationParameters:
     stop: Optional[list[str]] = UNSET
     seed: Optional[int] = UNSET
     tool_choice: Optional[JSON] = UNSET
+    response_format: Optional[JSON] = UNSET