diff --git a/backend/open_webui/utils/middleware.py b/backend/open_webui/utils/middleware.py
index b85407ebe3..96166e0ac3 100644
--- a/backend/open_webui/utils/middleware.py
+++ b/backend/open_webui/utils/middleware.py
@@ -110,6 +110,7 @@ from open_webui.utils.misc import (
     get_last_user_message_item,
     get_message_list,
     get_output_text,
+    get_reasoning_details,
     get_system_message,
     is_string_allowed,
     merge_system_messages,
@@ -3916,7 +3917,7 @@ async def non_streaming_chat_response_handler(response, ctx):
                     if not response_output:
                         choice_message = choices[0].get('message', {})
                         reasoning_content = choice_message.get('reasoning_content') or choice_message.get('reasoning')
-                        reasoning_details = choice_message.get('reasoning_details')
+                        reasoning_details = get_reasoning_details(choice_message)
                         response_output = []
                         if reasoning_content or reasoning_details:
                             reasoning_item = {
@@ -4957,7 +4958,7 @@ async def streaming_chat_response_handler(response, ctx):
                                         or delta.get('reasoning')
                                         or delta.get('thinking')
                                     )
-                                    reasoning_details = delta.get('reasoning_details')
+                                    reasoning_details = get_reasoning_details(delta)
                                     reasoning_detail_items = (
                                         [item for item in reasoning_details if isinstance(item, dict)]
                                         if isinstance(reasoning_details, list)
diff --git a/backend/open_webui/utils/misc.py b/backend/open_webui/utils/misc.py
index bfb1eff5e9..ac3eec866d 100644
--- a/backend/open_webui/utils/misc.py
+++ b/backend/open_webui/utils/misc.py
@@ -258,6 +258,17 @@ def reconcile_tool_pairs(messages: list[dict]) -> list[dict]:
     return reconciled_messages
 
 
+def get_reasoning_details(payload: dict):
+    if not isinstance(payload, dict):
+        return None
+
+    provider_fields = payload.get('provider_specific_fields') or {}
+    provider_details = (
+        provider_fields.get('reasoning_details') if isinstance(provider_fields, dict) else None
+    )
+    return payload.get('reasoning_details') or provider_details
+
+
 def convert_output_to_messages(
     output: list,
     raw: bool = False,
@@ -447,6 +458,14 @@ def convert_output_to_messages(
 
         elif item_type == 'reasoning':
             reasoning_details = item.get('reasoning_details') if raw else None
+            if reasoning_details:
+                reasoning_details = reasoning_details if isinstance(reasoning_details, list) else [reasoning_details]
+                reasoning_details = [
+                    detail
+                    for detail in reasoning_details
+                    if isinstance(detail, dict)
+                    and (detail.get('format') != 'anthropic-claude-v1' or detail.get('signature'))
+                ]
             if not reasoning_format and not reasoning_details:
                 continue
 
@@ -469,9 +488,7 @@ def convert_output_to_messages(
                     pending_reasoning.append(reasoning_text)
 
             if reasoning_details:
-                pending_reasoning_details.extend(
-                    reasoning_details if isinstance(reasoning_details, list) else [reasoning_details]
-                )
+                pending_reasoning_details.extend(reasoning_details)
 
         elif item_type == 'open_webui:code_interpreter':
             # Always include code interpreter content so the LLM knows