diff --git a/api/fields/dataset_fields.py b/api/fields/dataset_fields.py
index f967e78d10..ac2e6d19d7 100644
--- a/api/fields/dataset_fields.py
+++ b/api/fields/dataset_fields.py
@@ -200,7 +200,7 @@ class DatasetExternalKnowledgeInfoResponse(ResponseModel):
 
 class DatasetExternalRetrievalModelResponse(ResponseModel):
     top_k: int
-    score_threshold: float
+    score_threshold: float | None = None
     score_threshold_enabled: bool | None = None
 
 
diff --git a/api/openapi/markdown/console-swagger.md b/api/openapi/markdown/console-swagger.md
index ab2949100f..0d87fc32d0 100644
--- a/api/openapi/markdown/console-swagger.md
+++ b/api/openapi/markdown/console-swagger.md
@@ -11799,7 +11799,7 @@ Condition detail
 
 | Name | Type | Description | Required |
 | ---- | ---- | ----------- | -------- |
-| score_threshold | number |  | Yes |
+| score_threshold | number |  | No |
 | score_threshold_enabled | boolean |  | No |
 | top_k | integer |  | Yes |
 
diff --git a/api/openapi/markdown/service-swagger.md b/api/openapi/markdown/service-swagger.md
index 2d0f63415b..b89caf0269 100644
--- a/api/openapi/markdown/service-swagger.md
+++ b/api/openapi/markdown/service-swagger.md
@@ -2421,7 +2421,7 @@ Condition detail
 
 | Name | Type | Description | Required |
 | ---- | ---- | ----------- | -------- |
-| score_threshold | number |  | Yes |
+| score_threshold | number |  | No |
 | score_threshold_enabled | boolean |  | No |
 | top_k | integer |  | Yes |
 
diff --git a/packages/contracts/generated/api/console/datasets/types.gen.ts b/packages/contracts/generated/api/console/datasets/types.gen.ts
index e53acaa329..77c46fea16 100644
--- a/packages/contracts/generated/api/console/datasets/types.gen.ts
+++ b/packages/contracts/generated/api/console/datasets/types.gen.ts
@@ -504,7 +504,7 @@ export type DatasetExternalKnowledgeInfoResponse = {
 }
 
 export type DatasetExternalRetrievalModelResponse = {
-  score_threshold: number
+  score_threshold?: number | null
   score_threshold_enabled?: boolean | null
   top_k: number
 }
diff --git a/packages/contracts/generated/api/console/datasets/zod.gen.ts b/packages/contracts/generated/api/console/datasets/zod.gen.ts
index 9acd97cf49..c14c4fe455 100644
--- a/packages/contracts/generated/api/console/datasets/zod.gen.ts
+++ b/packages/contracts/generated/api/console/datasets/zod.gen.ts
@@ -317,7 +317,7 @@ export const zDatasetExternalKnowledgeInfoResponse = z.object({
  * DatasetExternalRetrievalModelResponse
  */
 export const zDatasetExternalRetrievalModelResponse = z.object({
-  score_threshold: z.number(),
+  score_threshold: z.number().nullish(),
   score_threshold_enabled: z.boolean().nullish(),
   top_k: z.int(),
 })
diff --git a/packages/contracts/generated/api/service/types.gen.ts b/packages/contracts/generated/api/service/types.gen.ts
index aaf4d618f4..46be7acdef 100644
--- a/packages/contracts/generated/api/service/types.gen.ts
+++ b/packages/contracts/generated/api/service/types.gen.ts
@@ -258,7 +258,7 @@ export type DatasetExternalKnowledgeInfoResponse = {
 }
 
 export type DatasetExternalRetrievalModelResponse = {
-  score_threshold: number
+  score_threshold?: number | null
   score_threshold_enabled?: boolean | null
   top_k: number
 }
diff --git a/packages/contracts/generated/api/service/zod.gen.ts b/packages/contracts/generated/api/service/zod.gen.ts
index 1b0b03f8cd..98383ec9cd 100644
--- a/packages/contracts/generated/api/service/zod.gen.ts
+++ b/packages/contracts/generated/api/service/zod.gen.ts
@@ -227,7 +227,7 @@ export const zDatasetExternalKnowledgeInfoResponse = z.object({
  * DatasetExternalRetrievalModelResponse
  */
 export const zDatasetExternalRetrievalModelResponse = z.object({
-  score_threshold: z.number(),
+  score_threshold: z.number().nullish(),
   score_threshold_enabled: z.boolean().nullish(),
   top_k: z.int(),
 })