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diff --git a/litellm/integrations/__pycache__/supabase.cpython-311.pyc b/litellm/integrations/__pycache__/supabase.cpython-311.pyc
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diff --git a/litellm/main.py b/litellm/main.py
index a8f7fbd5e..d41f0e91f 100644
--- a/litellm/main.py
+++ b/litellm/main.py
@@ -94,6 +94,9 @@ def completion(
         model_response = ModelResponse()
         if azure:  # this flag is deprecated, remove once notebooks are also updated.
             custom_llm_provider = "azure"
+        elif model.split("/", 1)[0] in litellm.provider_list: # allow custom provider to be passed in via the model name "azure/chatgpt-test"
+            custom_llm_provider = model.split("/", 1)[0]
+            model = model.split("/", 1)[1]
         args = locals()
         # check if user passed in any of the OpenAI optional params
         optional_params = get_optional_params(
diff --git a/litellm/tests/test_completion.py b/litellm/tests/test_completion.py
index e168c2324..fc9954459 100644
--- a/litellm/tests/test_completion.py
+++ b/litellm/tests/test_completion.py
@@ -25,6 +25,18 @@ def logger_fn(user_model_dict):
     print(f"user_model_dict: {user_model_dict}")
 
 
+def test_completion_custom_provider_model_name():
+    try:
+        response = completion(
+            model="together_ai/togethercomputer/llama-2-70b-chat", messages=messages, logger_fn=logger_fn
+        )
+        # Add any assertions here to check the response
+        print(response)
+    except Exception as e:
+        pytest.fail(f"Error occurred: {e}")
+
+test_completion_custom_provider_model_name()
+
 def test_completion_claude():
     try:
         response = completion(