diff --git a/api/core/tools/provider/builtin/stepfun/stepfun.py b/api/core/tools/provider/builtin/stepfun/stepfun.py
index b24f730c9..239db85b1 100644
--- a/api/core/tools/provider/builtin/stepfun/stepfun.py
+++ b/api/core/tools/provider/builtin/stepfun/stepfun.py
@@ -16,7 +16,7 @@ class StepfunProvider(BuiltinToolProviderController):
                 user_id="",
                 tool_parameters={
                     "prompt": "cute girl, blue eyes, white hair, anime style",
-                    "size": "1024x1024",
+                    "size": "256x256",
                     "n": 1,
                 },
             )
diff --git a/api/core/tools/provider/builtin/stepfun/stepfun.yaml b/api/core/tools/provider/builtin/stepfun/stepfun.yaml
index 1f841ec36..e8139a4d7 100644
--- a/api/core/tools/provider/builtin/stepfun/stepfun.yaml
+++ b/api/core/tools/provider/builtin/stepfun/stepfun.yaml
@@ -4,11 +4,9 @@ identity:
   label:
     en_US: Image-1X
     zh_Hans: 阶跃星辰绘画
-    pt_BR: Image-1X
   description:
     en_US: Image-1X
     zh_Hans: 阶跃星辰绘画
-    pt_BR: Image-1X
   icon: icon.png
   tags:
     - image
@@ -20,27 +18,16 @@ credentials_for_provider:
     label:
       en_US: Stepfun API key
       zh_Hans: 阶跃星辰API key
-      pt_BR: Stepfun API key
-    help:
-      en_US: Please input your stepfun API key
-      zh_Hans: 请输入你的阶跃星辰 API key
-      pt_BR: Please input your stepfun API key
     placeholder:
-      en_US: Please input your stepfun API key
+      en_US: Please input your Stepfun API key
       zh_Hans: 请输入你的阶跃星辰 API key
-      pt_BR: Please input your stepfun API key
+    url: https://platform.stepfun.com/interface-key
   stepfun_base_url:
     type: text-input
     required: false
     label:
       en_US: Stepfun base URL
       zh_Hans: 阶跃星辰 base URL
-      pt_BR: Stepfun base URL
-    help:
-      en_US: Please input your Stepfun base URL
-      zh_Hans: 请输入你的阶跃星辰 base URL
-      pt_BR: Please input your Stepfun base URL
     placeholder:
       en_US: Please input your Stepfun base URL
       zh_Hans: 请输入你的阶跃星辰 base URL
-      pt_BR: Please input your Stepfun base URL
diff --git a/api/core/tools/provider/builtin/stepfun/tools/image.py b/api/core/tools/provider/builtin/stepfun/tools/image.py
index 0b92b122b..eb55dae51 100644
--- a/api/core/tools/provider/builtin/stepfun/tools/image.py
+++ b/api/core/tools/provider/builtin/stepfun/tools/image.py
@@ -1,4 +1,3 @@
-import random
 from typing import Any, Union
 
 from openai import OpenAI
@@ -19,7 +18,7 @@ class StepfunTool(BuiltinTool):
         """
         invoke tools
         """
-        base_url = self.runtime.credentials.get("stepfun_base_url", "https://api.stepfun.com")
+        base_url = self.runtime.credentials.get("stepfun_base_url") or "https://api.stepfun.com"
         base_url = str(URL(base_url) / "v1")
 
         client = OpenAI(
@@ -28,9 +27,7 @@ class StepfunTool(BuiltinTool):
         )
 
         extra_body = {}
-        model = tool_parameters.get("model", "step-1x-medium")
-        if not model:
-            return self.create_text_message("Please input model name")
+        model = "step-1x-medium"
         # prompt
         prompt = tool_parameters.get("prompt", "")
         if not prompt:
@@ -67,9 +64,3 @@ class StepfunTool(BuiltinTool):
                 )
             )
         return result
-
-    @staticmethod
-    def _generate_random_id(length=8):
-        characters = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
-        random_id = "".join(random.choices(characters, k=length))
-        return random_id
diff --git a/api/core/tools/provider/builtin/stepfun/tools/image.yaml b/api/core/tools/provider/builtin/stepfun/tools/image.yaml
index dcc5bd2db..8d7c9b658 100644
--- a/api/core/tools/provider/builtin/stepfun/tools/image.yaml
+++ b/api/core/tools/provider/builtin/stepfun/tools/image.yaml
@@ -29,35 +29,6 @@ parameters:
       pt_BR: Image prompt, you can check the official documentation of step-1x
     llm_description: Image prompt of step-1x you should describe the image you want to generate as a list of words as possible as detailed
     form: llm
-  - name: model
-    type: select
-    required: false
-    human_description:
-      en_US: used for selecting the model name
-      zh_Hans: 用于选择模型的名字
-      pt_BR: used for selecting the model name
-    label:
-      en_US: Model Name
-      zh_Hans: 模型名字
-      pt_BR: Model Name
-    form: form
-    options:
-      - value: step-1x-turbo
-        label:
-          en_US: turbo
-          zh_Hans: turbo
-          pt_BR: turbo
-      - value: step-1x-medium
-        label:
-          en_US: medium
-          zh_Hans: medium
-          pt_BR: medium
-      - value: step-1x-large
-        label:
-          en_US: large
-          zh_Hans: large
-          pt_BR: large
-    default: step-1x-medium
   - name: size
     type: select
     required: false