diff --git a/internal/cli/user_parser.go b/internal/cli/user_parser.go
index 64f9234680..2dd262a88f 100644
--- a/internal/cli/user_parser.go
+++ b/internal/cli/user_parser.go
@@ -2830,12 +2830,14 @@ optionsLoop:
 	}
 	cmd := NewCommand("chat_to_model")
 
-	if common.IsCompositeModelName(modelNameOrID) {
-		cmd.Params["composite_model_name"] = modelNameOrID
-	} else if common.IsUUID(modelNameOrID) {
-		cmd.Params["model_id"] = modelNameOrID
-	} else {
-		return nil, fmt.Errorf("invalid format of model name or ID: %s", modelNameOrID)
+	if modelNameOrID != "" {
+		if common.IsCompositeModelName(modelNameOrID) {
+			cmd.Params["composite_model_name"] = modelNameOrID
+		} else if common.IsUUID(modelNameOrID) {
+			cmd.Params["model_id"] = modelNameOrID
+		} else {
+			return nil, fmt.Errorf("invalid format of model name or ID: %s", modelNameOrID)
+		}
 	}
 	cmd.Params["messages"] = messages
 	cmd.Params["images"] = images
diff --git a/internal/cli/user_parser_test.go b/internal/cli/user_parser_test.go
index c2b47e8c34..99c347ad9f 100644
--- a/internal/cli/user_parser_test.go
+++ b/internal/cli/user_parser_test.go
@@ -5,6 +5,32 @@ import (
 	"testing"
 )
 
+func TestParseChatMessageUsesCurrentModel(t *testing.T) {
+	p := NewParser("chat message 'hi';")
+	cmd, err := p.Parse(APIMode)
+	if err != nil {
+		t.Fatalf("Parse() error = %v", err)
+	}
+
+	if cmd.Type != "chat_to_model" {
+		t.Fatalf("Command Type = %v, expected chat_to_model", cmd.Type)
+	}
+	if _, ok := cmd.Params["composite_model_name"]; ok {
+		t.Fatal("composite_model_name should not be set")
+	}
+	if _, ok := cmd.Params["model_id"]; ok {
+		t.Fatal("model_id should not be set")
+	}
+
+	gotMessages, ok := cmd.Params["messages"].([]string)
+	if !ok {
+		t.Fatalf("messages param has type %T, expected []string", cmd.Params["messages"])
+	}
+	if !reflect.DeepEqual(gotMessages, []string{"hi"}) {
+		t.Fatalf("messages = %v, expected [hi]", gotMessages)
+	}
+}
+
 func TestParseAddModelWithDimensions(t *testing.T) {
 	tests := []struct {
 		name     string
diff --git a/internal/development.md b/internal/development.md
index 3a0d1c0b33..87af2e383c 100644
--- a/internal/development.md
+++ b/internal/development.md
@@ -324,19 +324,19 @@ Time: 1.680416
 
 ### 6.19. Set, reset, and list default models
 ```
-RAGFlow(api/default)> set default chat model 'zhipu-ai/test/glm-4.5-flash';
+RAGFlow(api/default)> set default chat model 'glm-4.5-flash@test@zhipu-ai';
 SUCCESS
-RAGFlow(api/default)> set default vision model 'zhipu-ai/test/glm-4.5v';
+RAGFlow(api/default)> set default vision model 'glm-4.5v@test@zhipu-ai';
 SUCCESS
-RAGFlow(api/default)> set default embedding model 'zhipu-ai/test/embedding-2';
+RAGFlow(api/default)> set default embedding model 'embedding-2@test@zhipu-ai';
 SUCCESS
-RAGFlow(api/default)> set default rerank model 'zhipu-ai/test/rerank';
+RAGFlow(api/default)> set default rerank model 'rerank@test@zhipu-ai';
 SUCCESS
-RAGFlow(api/default)> set default ocr model 'zhipu-ai/test/glm-ocr';
+RAGFlow(api/default)> set default ocr model 'glm-ocr@test@zhipu-ai';
 SUCCESS
-RAGFlow(api/default)> set default tts model 'zhipu-ai/test/glm-tts';
+RAGFlow(api/default)> set default tts model 'tts@test@zhipu-ai';
 SUCCESS
-RAGFlow(api/default)> set default asr model 'zhipu-ai/test/glm-asr-2512';
+RAGFlow(api/default)> set default asr model 'glm-asr-2512@test@zhipu-ai';
 SUCCESS
 RAGFlow(api/default)> list default models;
 +--------+----------------+---------------+----------------+------------+