diff --git a/app/ui/app/src/api.ts b/app/ui/app/src/api.ts
index c8b2e116..4158bafc 100644
--- a/app/ui/app/src/api.ts
+++ b/app/ui/app/src/api.ts
@@ -205,6 +205,13 @@ export async function* sendMessage(
     data: uint8ArrayToBase64(att.data),
   }));
 
+  // Only send think parameter when actually requesting thinking
+  // Don't send false as it causes issues with some providers
+  const shouldSendThink =
+    think !== undefined &&
+    ((typeof think === "boolean" && think) ||
+      (typeof think === "string" && think !== ""));
+
   const response = await fetch(`${API_BASE}/api/v1/chat/${chatId}`, {
     method: "POST",
     headers: {
@@ -222,7 +229,7 @@ export async function* sendMessage(
         web_search: webSearch ?? false,
         file_tools: fileTools ?? false,
         ...(forceUpdate !== undefined ? { forceUpdate } : {}),
-        ...(think !== undefined ? { think } : {}),
+        ...(shouldSendThink ? { think } : {}),
       }),
     ),
     signal,
diff --git a/app/ui/ui.go b/app/ui/ui.go
index fce58895..1d0e2579 100644
--- a/app/ui/ui.go
+++ b/app/ui/ui.go
@@ -1794,13 +1794,14 @@ func (s *Server) buildChatRequest(chat *store.Chat, model string, think any, ava
 
 	var thinkValue *api.ThinkValue
 	if think != nil {
+		// Only set Think if it's actually requesting thinking
 		if boolValue, ok := think.(bool); ok {
-			thinkValue = &api.ThinkValue{
-				Value: boolValue,
+			if boolValue {
+				thinkValue = &api.ThinkValue{Value: boolValue}
 			}
 		} else if stringValue, ok := think.(string); ok {
-			thinkValue = &api.ThinkValue{
-				Value: stringValue,
+			if stringValue != "" && stringValue != "none" {
+				thinkValue = &api.ThinkValue{Value: stringValue}
 			}
 		}
 	}