diff --git a/src/pipecat/services/cartesia.py b/src/pipecat/services/cartesia.py
index a91c06176..35856ea52 100644
--- a/src/pipecat/services/cartesia.py
+++ b/src/pipecat/services/cartesia.py
@@ -88,7 +88,7 @@ class CartesiaTTSService(WordTTSService, WebsocketService):
         voice_id: str,
         cartesia_version: str = "2024-06-10",
         url: str = "wss://api.cartesia.ai/tts/websocket",
-        model: str = "sonic-english",
+        model: str = "sonic",
         sample_rate: int = 24000,
         encoding: str = "pcm_s16le",
         container: str = "raw",
@@ -329,7 +329,7 @@ class CartesiaHttpTTSService(TTSService):
         *,
         api_key: str,
         voice_id: str,
-        model: str = "sonic-english",
+        model: str = "sonic",
         base_url: str = "https://api.cartesia.ai",
         sample_rate: int = 24000,
         encoding: str = "pcm_s16le",