diff --git a/lib/Service/OpenAiAPIService.php b/lib/Service/OpenAiAPIService.php
index 0c1679d5..7a9722ef 100644
--- a/lib/Service/OpenAiAPIService.php
+++ b/lib/Service/OpenAiAPIService.php
@@ -91,6 +91,26 @@ public function isUsingOpenAi(?string $serviceType = null): bool {
 		return $serviceUrl === '' || $serviceUrl === Application::OPENAI_API_BASE_URL;
 	}
 
+	/**
+	 * @param ?string $serviceType
+	 * @return bool
+	 */
+	public function isUsingOpenRouter(?string $serviceType = null): bool {
+		$serviceUrl = '';
+		if ($serviceType === Application::SERVICE_TYPE_IMAGE) {
+			$serviceUrl = $this->openAiSettingsService->getImageServiceUrl();
+		} elseif ($serviceType === Application::SERVICE_TYPE_STT) {
+			$serviceUrl = $this->openAiSettingsService->getSttServiceUrl();
+		} elseif ($serviceType === Application::SERVICE_TYPE_TTS) {
+			$serviceUrl = $this->openAiSettingsService->getTtsServiceUrl();
+		}
+		if ($serviceUrl === '') {
+			$serviceUrl = $this->openAiSettingsService->getServiceUrl();
+		}
+		// Return true if the service URL references OpenRouter (e.g., openrouter.ai)
+		return str_starts_with(strtolower($serviceUrl), 'https://openrouter.ai');
+	}
+
 	/**
 	 * @param ?string $serviceType
 	 *
@@ -221,7 +241,8 @@ public function getModels(?string $userId, bool $refresh = false, ?string $servi
 
 		try {
 			$this->logger->debug('Actually getting OpenAI models with a network request');
-			$modelsResponse = $this->request($userId, 'models', serviceType: $serviceType);
+			$params = $this->isUsingOpenRouter($serviceType) ? ['output_modalities' => 'all'] : [];
+			$modelsResponse = $this->request($userId, 'models', $params, serviceType: $serviceType);
 		} catch (Exception $e) {
 			$this->logger->warning('Error retrieving models (exc): ' . $e->getMessage());
 			throw $e;