diff --git a/assemblyai/__version__.py b/assemblyai/__version__.py
index a06ff4e0..3a384fb2 100644
--- a/assemblyai/__version__.py
+++ b/assemblyai/__version__.py
@@ -1 +1 @@
-__version__ = "1.5.3"
+__version__ = "1.5.4"
diff --git a/assemblyai/streaming/v3/models.py b/assemblyai/streaming/v3/models.py
index 8ce3acd8..15dfb1b4 100644
--- a/assemblyai/streaming/v3/models.py
+++ b/assemblyai/streaming/v3/models.py
@@ -200,6 +200,7 @@ class SpeechModel(str, Enum):
     u3_rt_pro_beta_1 = "u3-rt-pro-beta-1"
     whisper_rt = "whisper-rt"
     universal_3_5_pro = "universal-3-5-pro"
+    universal_3_6 = "universal-3-6"
     universal_3_6_pro = "universal-3-6-pro"
     u3_pro = "u3-pro"  # Deprecated: Use u3_rt_pro instead
 
diff --git a/tests/unit/test_streaming.py b/tests/unit/test_streaming.py
index 431f7523..552dc915 100644
--- a/tests/unit/test_streaming.py
+++ b/tests/unit/test_streaming.py
@@ -1086,6 +1086,35 @@ def mocked_websocket_connect(
     assert "speech_model=universal-3-5-pro" in actual_url
 
 
+def test_client_connect_with_universal_3_6(mocker: MockFixture):
+    actual_url = None
+
+    def mocked_websocket_connect(
+        url: str, additional_headers: dict, open_timeout: float
+    ):
+        nonlocal actual_url
+        actual_url = url
+
+    mocker.patch(
+        "assemblyai.streaming.v3.client.websocket_connect",
+        new=mocked_websocket_connect,
+    )
+
+    _disable_rw_threads(mocker)
+
+    options = StreamingClientOptions(api_key="test", api_host="api.example.com")
+    client = StreamingClient(options)
+
+    params = StreamingParameters(
+        sample_rate=16000,
+        speech_model=SpeechModel.universal_3_6,
+    )
+
+    client.connect(params)
+
+    assert "speech_model=universal-3-6" in actual_url
+
+
 def test_client_connect_with_universal_3_6_pro(mocker: MockFixture):
     actual_url = None