diff --git a/includes/Services/REST_Routes/Service_Generate_Content_REST_Route.php b/includes/Services/REST_Routes/Service_Generate_Content_REST_Route.php
index 40b9142..65ffb66 100644
--- a/includes/Services/REST_Routes/Service_Generate_Content_REST_Route.php
+++ b/includes/Services/REST_Routes/Service_Generate_Content_REST_Route.php
@@ -131,7 +131,7 @@ protected function handle_request( WP_REST_Request $request ): WP_REST_Response
 
 		$service = $this->services_api->get_available_service( $request['slug'] );
 
-		if ( isset( $request['model'] ) ) {
+		if ( isset( $request['model'] ) && '' !== $request['model'] ) {
 			$model = $request['model'];
 		} else {
 			// For now, we just use the first model available. TODO: Improve this later, e.g. by specifying a default.
@@ -180,8 +180,9 @@ protected function handle_request( WP_REST_Request $request ): WP_REST_Response
 			throw REST_Exception::create(
 				'rest_generating_content_failed',
 				sprintf(
-					/* translators: %s: original error message */
-					esc_html__( 'Generating content failed: %s', 'wp-starter-plugin' ),
+					/* translators: 1: model slug, 2: original error message */
+					esc_html__( 'Generating content with model %1$s failed: %2$s', 'wp-starter-plugin' ),
+					esc_html( $model->get_model_slug() ),
 					esc_html( $e->getMessage() )
 				),
 				500
@@ -190,8 +191,9 @@ protected function handle_request( WP_REST_Request $request ): WP_REST_Response
 			throw REST_Exception::create(
 				'rest_invalid_content',
 				sprintf(
-					/* translators: %s: original error message */
-					esc_html__( 'Invalid content provided: %s', 'wp-starter-plugin' ),
+					/* translators: 1: model slug, 2: original error message */
+					esc_html__( 'Invalid content provided to model %1$s: %2$s', 'wp-starter-plugin' ),
+					esc_html( $model->get_model_slug() ),
 					esc_html( $e->getMessage() )
 				),
 				400
diff --git a/src/ai-store/generative-ai-service.js b/src/ai-store/generative-ai-service.js
index 2f5719b..9b847cf 100644
--- a/src/ai-store/generative-ai-service.js
+++ b/src/ai-store/generative-ai-service.js
@@ -95,15 +95,19 @@ export class GenerativeAiService {
 			}
 		}
 
-		return await apiFetch( {
-			path: `/wp-starter-plugin/v1/services/${ this.slug }:generate-content`,
-			method: 'POST',
-			data: {
-				content,
-				model: model || '',
-				modelParams: modelParams || {},
-			},
-		} );
+		try {
+			return await apiFetch( {
+				path: `/wp-starter-plugin/v1/services/${ this.slug }:generate-content`,
+				method: 'POST',
+				data: {
+					content,
+					model: model || '',
+					modelParams: modelParams || {},
+				},
+			} );
+		} catch ( error ) {
+			throw new Error( error.message || error.code || error );
+		}
 	}
 }