diff --git a/rdagent/oai/backend/base.py b/rdagent/oai/backend/base.py
index 41a8ab29..441130ff 100644
--- a/rdagent/oai/backend/base.py
+++ b/rdagent/oai/backend/base.py
@@ -617,7 +617,7 @@ class APIBackend(ABC):
         return [content_to_embedding_dict[content] for content in input_content_list]  # type: ignore[misc]
 
     @abstractmethod
-    def support_function_calling(self) -> bool:
+    def supports_response_schema(self) -> bool:
         """
         Check if the backend supports function calling
         """
diff --git a/rdagent/oai/backend/deprec.py b/rdagent/oai/backend/deprec.py
index 693eb72e..c052e281 100644
--- a/rdagent/oai/backend/deprec.py
+++ b/rdagent/oai/backend/deprec.py
@@ -261,7 +261,7 @@ class DeprecBackend(APIBackend):
                     raise
         return encoding
 
-    def support_function_calling(self) -> bool:
+    def supports_response_schema(self) -> bool:
         """
         Check if the backend supports function calling.
         Currently, deprec backend does not support function calling so it returns False. #FIXME: maybe a mapping to the backend class is needed.
diff --git a/rdagent/oai/backend/litellm.py b/rdagent/oai/backend/litellm.py
index 9c9861ab..82f6b8bb 100644
--- a/rdagent/oai/backend/litellm.py
+++ b/rdagent/oai/backend/litellm.py
@@ -192,8 +192,8 @@ class LiteLLMAPIBackend(APIBackend):
         )
         return content, finish_reason
 
-    def support_function_calling(self) -> bool:
+    def supports_response_schema(self) -> bool:
         """
         Check if the backend supports function calling
         """
-        return supports_function_calling(model=LITELLM_SETTINGS.chat_model) and LITELLM_SETTINGS.enable_function_call
+        return supports_response_schema(model=LITELLM_SETTINGS.chat_model) and LITELLM_SETTINGS.enable_response_schema
diff --git a/rdagent/oai/llm_conf.py b/rdagent/oai/llm_conf.py
index 95302089..db17777b 100644
--- a/rdagent/oai/llm_conf.py
+++ b/rdagent/oai/llm_conf.py
@@ -16,9 +16,8 @@ class LLMSettings(ExtendedBaseSettings):
     embedding_model: str = "text-embedding-3-small"
 
     reasoning_effort: Literal["low", "medium", "high"] | None = None
-    enable_function_call: bool = (
-        True  # Whether to enable function calling in chat models. may not work for models that do not support it.
-    )
+    enable_response_schema: bool = True
+    # Whether to enable response_schema in chat models. may not work for models that do not support it.
 
     # Handling format
     reasoning_think_rm: bool = False
diff --git a/rdagent/scenarios/data_science/proposal/exp_gen/proposal.py b/rdagent/scenarios/data_science/proposal/exp_gen/proposal.py
index fb0da13a..c3b76ec7 100644
--- a/rdagent/scenarios/data_science/proposal/exp_gen/proposal.py
+++ b/rdagent/scenarios/data_science/proposal/exp_gen/proposal.py
@@ -457,12 +457,12 @@ class DSProposalV1ExpGen(ExpGen):
 class DSProposalV2ExpGen(ExpGen):
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
-        self.support_function_calling = APIBackend().support_function_calling()
+        self.supports_response_schema = APIBackend().supports_response_schema()
 
     def identify_scenario_problem(self, scenario_desc: str, sota_exp_desc: str) -> Dict:
         sys_prompt = T(".prompts_v2:scenario_problem.system").r(
             problem_output_format=(
-                T(".prompts_v2:output_format.problem").r() if not self.support_function_calling else None
+                T(".prompts_v2:output_format.problem").r() if not self.supports_response_schema else None
             ),
         )
         user_prompt = T(".prompts_v2:scenario_problem.user").r(
@@ -472,10 +472,10 @@ class DSProposalV2ExpGen(ExpGen):
         response = APIBackend().build_messages_and_create_chat_completion(
             user_prompt=user_prompt,
             system_prompt=sys_prompt,
-            response_format=ScenarioChallenges if self.support_function_calling else {"type": "json_object"},
-            json_target_type=Dict[str, Dict[str, str]] if not self.support_function_calling else None,
+            response_format=ScenarioChallenges if self.supports_response_schema else {"type": "json_object"},
+            json_target_type=Dict[str, Dict[str, str]] if not self.supports_response_schema else None,
         )
-        if self.support_function_calling:
+        if self.supports_response_schema:
             challenges = ScenarioChallenges(**json.loads(response))
             # Translate to problems
             problems = {o.caption: {"problem": o.statement, "reason": o.reasoning} for o in challenges.challenges}
@@ -490,7 +490,7 @@ class DSProposalV2ExpGen(ExpGen):
     ) -> Dict:
         sys_prompt = T(".prompts_v2:feedback_problem.system").r(
             problem_output_format=(
-                T(".prompts_v2:output_format.problem").r() if not self.support_function_calling else None
+                T(".prompts_v2:output_format.problem").r() if not self.supports_response_schema else None
             ),
             inject_diverse=inject_diverse,
         )
@@ -502,10 +502,10 @@ class DSProposalV2ExpGen(ExpGen):
         response = APIBackend().build_messages_and_create_chat_completion(
             user_prompt=user_prompt,
             system_prompt=sys_prompt,
-            response_format=TraceChallenges if self.support_function_calling else {"type": "json_object"},
-            json_target_type=Dict[str, Dict[str, str]] if not self.support_function_calling else None,
+            response_format=TraceChallenges if self.supports_response_schema else {"type": "json_object"},
+            json_target_type=Dict[str, Dict[str, str]] if not self.supports_response_schema else None,
         )
-        if self.support_function_calling:
+        if self.supports_response_schema:
             challenges = TraceChallenges(**json.loads(response))
             # Translate to problems
             problems = {o.caption: {"problem": o.statement, "reason": o.reasoning} for o in challenges.challenges}
@@ -569,7 +569,7 @@ class DSProposalV2ExpGen(ExpGen):
         sys_prompt = T(".prompts_v2:hypothesis_gen.system").r(
             hypothesis_output_format=(
                 T(".prompts_v2:output_format.hypothesis").r(pipeline=pipeline, enable_idea_pool=enable_idea_pool)
-                if not self.support_function_calling
+                if not self.supports_response_schema
                 else None
             ),
             pipeline=pipeline,
@@ -586,12 +586,12 @@ class DSProposalV2ExpGen(ExpGen):
         response = APIBackend().build_messages_and_create_chat_completion(
             user_prompt=user_prompt,
             system_prompt=sys_prompt,
-            response_format=HypothesisList if self.support_function_calling else {"type": "json_object"},
+            response_format=HypothesisList if self.supports_response_schema else {"type": "json_object"},
             json_target_type=(
-                Dict[str, Dict[str, str | Dict[str, str | int]]] if not self.support_function_calling else None
+                Dict[str, Dict[str, str | Dict[str, str | int]]] if not self.supports_response_schema else None
             ),
         )
-        if self.support_function_calling:
+        if self.supports_response_schema:
             hypotheses = HypothesisList(**json.loads(response))
             resp_dict = {
                 h.caption: {
@@ -728,7 +728,7 @@ class DSProposalV2ExpGen(ExpGen):
             component_info = get_component(hypotheses[0].component)
         data_folder_info = self.scen.processed_data_folder_description
         sys_prompt = T(".prompts_v2:task_gen.system").r(
-            task_output_format=component_info["task_output_format"] if not self.support_function_calling else None,
+            task_output_format=component_info["task_output_format"] if not self.supports_response_schema else None,
             # task_output_format=component_info["task_output_format"],
             component_desc=component_desc,
             workflow_check=not pipeline and hypotheses[0].component != "Workflow",
@@ -744,12 +744,12 @@ class DSProposalV2ExpGen(ExpGen):
         response = APIBackend().build_messages_and_create_chat_completion(
             user_prompt=user_prompt,
             system_prompt=sys_prompt,
-            response_format=CodingSketch if self.support_function_calling else {"type": "json_object"},
-            json_target_type=Dict[str, str | Dict[str, str]] if not self.support_function_calling else None,
+            response_format=CodingSketch if self.supports_response_schema else {"type": "json_object"},
+            json_target_type=Dict[str, str | Dict[str, str]] if not self.supports_response_schema else None,
         )
         task_dict = json.loads(response)
         task_design = (
-            task_dict.get("task_design", {}) if not self.support_function_calling else task_dict.get("sketch", {})
+            task_dict.get("task_design", {}) if not self.supports_response_schema else task_dict.get("sketch", {})
         )
         logger.info(f"Task design:\n{task_design}")
         task_name = hypotheses[0].component