diff --git a/src/config/index.mjs b/src/config/index.mjs
index abd174a67..1b9ad9ebc 100644
--- a/src/config/index.mjs
+++ b/src/config/index.mjs
@@ -152,6 +152,7 @@ export const openRouterApiModelKeys = [
   'openRouter_openai_o3',
   'openRouter_openai_gpt_4_1_mini',
   'openRouter_fusion',
+  'openRouter_fusion_flash',
   'openRouter_openai_gpt_chat_latest',
   'openRouter_openai_gpt_5_5',
   'openRouter_openai_gpt_5_5_pro',
@@ -516,6 +517,10 @@ export const Models = {
     value: 'openrouter/fusion',
     desc: 'OpenRouter (Fusion)',
   },
+  openRouter_fusion_flash: {
+    value: 'openrouter/fusion-flash',
+    desc: 'OpenRouter (Fusion Flash)',
+  },
   openRouter_openai_gpt_chat_latest: {
     value: 'openai/gpt-chat-latest',
     desc: 'OpenRouter (GPT Chat Latest)',
diff --git a/tests/unit/services/apis/thin-adapters.test.mjs b/tests/unit/services/apis/thin-adapters.test.mjs
index 4a41d2f11..618629207 100644
--- a/tests/unit/services/apis/thin-adapters.test.mjs
+++ b/tests/unit/services/apis/thin-adapters.test.mjs
@@ -68,10 +68,11 @@ const adapters = [
   },
   {
     name: 'openrouter-api',
-    apiMode: { groupName: 'openRouterApiModelKeys', itemName: 'openRouter_openai_o3' },
+    apiMode: { groupName: 'openRouterApiModelKeys', itemName: 'openRouter_fusion_flash' },
     providerId: 'openrouter',
     expectedBaseUrl: 'https://openrouter.ai/api/v1',
     expectedApiKey: 'or-key',
+    expectedModel: 'openrouter/fusion-flash',
   },
   {
     name: 'chatglm-api',
@@ -116,6 +117,9 @@ for (const adapter of adapters) {
     assert.equal(capturedInput, `${adapter.expectedBaseUrl}/chat/completions`)
     // Verify API key reaches the Authorization header
     assert.equal(capturedInit.headers.Authorization, `Bearer ${adapter.expectedApiKey}`)
+    if (adapter.expectedModel) {
+      assert.equal(JSON.parse(capturedInit.body).model, adapter.expectedModel)
+    }
   })
 
   test(`${adapter.name}: delegates to compat layer and produces output`, async (t) => {