diff --git a/app/api/common.ts b/app/api/common.ts
index b7e41fa2647..dbbebe7443b 100644
--- a/app/api/common.ts
+++ b/app/api/common.ts
@@ -124,7 +124,7 @@ export async function requestOpenai(req: NextRequest) {
           [
             ServiceProvider.OpenAI,
             ServiceProvider.Azure,
-            jsonBody?.model as string, // support provider-unspecified model
+            "custom" as string, // support provider-unspecified model
           ],
         )
       ) {
diff --git a/app/utils/model.ts b/app/utils/model.ts
index a1a38a2f81c..83bc51f0214 100644
--- a/app/utils/model.ts
+++ b/app/utils/model.ts
@@ -66,8 +66,8 @@ export function collectModelTable(
 
   // default models
   models.forEach((m) => {
-    // using <modelName>@<providerId> as fullName
-    modelTable[`${m.name}@${m?.provider?.id}`] = {
+    // using <modelName>@<providerType> as fullName
+    modelTable[`${m.name}@${m?.provider?.providerType}`] = {
       ...m,
       displayName: m.name, // 'provider' is copied over if it exists
     };
@@ -126,7 +126,7 @@ export function collectModelTable(
             displayName: displayName || customModelName,
             available,
             provider, // Use optional chaining
-            sorted: CustomSeq.next(`${customModelName}@${provider?.id}`),
+            sorted: CustomSeq.next(`${customModelName}@${provider?.providerType}`),
           };
         }
       }
diff --git a/test/model-available.test.ts b/test/model-available.test.ts
index 5c9fa9977d2..c338faa86a8 100644
--- a/test/model-available.test.ts
+++ b/test/model-available.test.ts
@@ -53,7 +53,7 @@ describe("isModelNotavailableInServer", () => {
     expect(result).toBe(true);
   });
 
-  // FIXME: 这个测试用例有问题，需要修复
+  // FIXME: 这个测试用例有问题，需要修复 ？？？
   //   test("support passing multiple providers, model available on one of the providers will return false", () => {
   //     const customModels = "-all,gpt-4@google";
   //     const modelName = "gpt-4";
@@ -69,7 +69,19 @@ describe("isModelNotavailableInServer", () => {
   test("test custom model without setting provider", () => {
     const customModels = "-all,mistral-large";
     const modelName = "mistral-large";
-    const providerNames = modelName;
+    const providerNames = "custom";
+    const result = isModelNotavailableInServer(
+      customModels,
+      modelName,
+      providerNames,
+    );
+    expect(result).toBe(false);
+  });
+
+  test("test custom model with non-standard provider", () => {
+    const customModels = "-all,deepseek-chat@DeepSeek";
+    const modelName = "deepseek-chat";
+    const providerNames = "custom";
     const result = isModelNotavailableInServer(
       customModels,
       modelName,