diff --git a/packages/backend/server/src/plugins/copilot/prompt/prompts.ts b/packages/backend/server/src/plugins/copilot/prompt/prompts.ts
index e21a9334f..0dc016063 100644
--- a/packages/backend/server/src/plugins/copilot/prompt/prompts.ts
+++ b/packages/backend/server/src/plugins/copilot/prompt/prompts.ts
@@ -982,7 +982,7 @@ When referencing information from the provided documents in your response:
   },
   {
     name: 'Search With AFFiNE AI',
-    model: 'sonar',
+    model: 'sonar-reasoning-pro',
     messages: [],
   },
   // use for believer plan
diff --git a/packages/backend/server/src/plugins/copilot/providers/perplexity.ts b/packages/backend/server/src/plugins/copilot/providers/perplexity.ts
index f9ebed93b..100a75d81 100644
--- a/packages/backend/server/src/plugins/copilot/providers/perplexity.ts
+++ b/packages/backend/server/src/plugins/copilot/providers/perplexity.ts
@@ -187,7 +187,7 @@ export class PerplexityProvider implements CopilotTextToTextProvider {
 
   async generateText(
     messages: PromptMessage[],
-    model: string = 'llama-3.1-sonar-small-128k-online',
+    model: string = 'sonar',
     options: CopilotChatOptions = {}
   ): Promise<string> {
     await this.checkParams({ messages, model, options });
@@ -237,7 +237,7 @@ export class PerplexityProvider implements CopilotTextToTextProvider {
 
   async *generateTextStream(
     messages: PromptMessage[],
-    model: string = 'llama-3.1-sonar-small-128k-online',
+    model: string = 'sonar',
     options: CopilotChatOptions = {}
   ): AsyncIterable<string> {
     await this.checkParams({ messages, model, options });