diff --git a/src/server/services/downstreamApiKeyService.test.ts b/src/server/services/downstreamApiKeyService.test.ts
index faa08e8..c2c3bb1 100644
--- a/src/server/services/downstreamApiKeyService.test.ts
+++ b/src/server/services/downstreamApiKeyService.test.ts
@@ -116,6 +116,12 @@ describe('downstreamApiKeyService', () => {
     expect(service.isModelAllowedByPolicy('gemini-2.0-flash', result.policy)).toBe(false);
   });
 
+  it('keeps all explicitly selected supported models when list exceeds 200 items', () => {
+    const selectedModels = Array.from({ length: 260 }, (_, index) => `model-${String(index + 1).padStart(3, '0')}`);
+
+    expect(service.normalizeSupportedModelsInput(selectedModels)).toEqual(selectedModels);
+  });
+
   it('treats selected groups as additional allowed exposed route scope (union semantics)', async () => {
     const claudeGroup = await db.insert(schema.tokenRoutes).values({
       modelPattern: 're:^claude-(opus|sonnet)-4-6$',
diff --git a/src/server/services/downstreamApiKeyService.ts b/src/server/services/downstreamApiKeyService.ts
index 9db2e41..105f6d0 100644
--- a/src/server/services/downstreamApiKeyService.ts
+++ b/src/server/services/downstreamApiKeyService.ts
@@ -131,16 +131,14 @@ export function normalizeSupportedModelsInput(input: unknown): string[] {
   if (Array.isArray(input)) {
     return input
       .map((item) => (typeof item === 'string' ? item.trim() : ''))
-      .filter((item, index, arr) => item.length > 0 && arr.indexOf(item) === index)
-      .slice(0, 200);
+      .filter((item, index, arr) => item.length > 0 && arr.indexOf(item) === index);
   }
 
   if (typeof input === 'string') {
     return input
       .split(/\r?\n|,/g)
       .map((item) => item.trim())
-      .filter((item, index, arr) => item.length > 0 && arr.indexOf(item) === index)
-      .slice(0, 200);
+      .filter((item, index, arr) => item.length > 0 && arr.indexOf(item) === index);
   }
 
   return [];