diff --git a/litellm/tests/test_cost_calc.py b/litellm/tests/test_cost_calc.py
new file mode 100644
index 000000000..bab29485b
--- /dev/null
+++ b/litellm/tests/test_cost_calc.py
@@ -0,0 +1,105 @@
+import os
+import sys
+import traceback
+
+from dotenv import load_dotenv
+
+load_dotenv()
+import io
+import os
+
+sys.path.insert(
+    0, os.path.abspath("../..")
+)  # Adds the parent directory to the system path
+from typing import Literal
+
+import pytest
+from pydantic import BaseModel, ConfigDict
+
+import litellm
+from litellm import Router, completion_cost, stream_chunk_builder
+
+models = [
+    dict(
+        model_name="openai/gpt-3.5-turbo",
+    ),
+    dict(
+        model_name="anthropic/claude-3-haiku-20240307",
+    ),
+    dict(
+        model_name="together_ai/meta-llama/Llama-2-7b-chat-hf",
+    ),
+]
+
+router = Router(
+    model_list=[
+        {
+            "model_name": m["model_name"],
+            "litellm_params": {
+                "model": m.get("model", m["model_name"]),
+            },
+        }
+        for m in models
+    ],
+    routing_strategy="simple-shuffle",
+    num_retries=3,
+    retry_after=1.0,
+    timeout=60.0,
+    allowed_fails=2,
+    cooldown_time=0,
+    debug_level="INFO",
+)
+
+
+@pytest.mark.parametrize(
+    "model",
+    [
+        "openai/gpt-3.5-turbo",
+        "anthropic/claude-3-haiku-20240307",
+        "together_ai/meta-llama/Llama-2-7b-chat-hf",
+    ],
+)
+def test_run(model: str):
+    """
+    Relevant issue - https://github.com/BerriAI/litellm/issues/4965
+    """
+    prompt = "Hi"
+    kwargs = dict(
+        model=model,
+        messages=[{"role": "user", "content": prompt}],
+        temperature=0.001,
+        top_p=0.001,
+        max_tokens=20,
+        input_cost_per_token=2,
+        output_cost_per_token=2,
+    )
+
+    print(f"--------- {model} ---------")
+    print(f"Prompt: {prompt}")
+
+    response = router.completion(**kwargs)
+    non_stream_output = response.choices[0].message.content.replace("\n", "")
+    non_stream_cost_calc = response._hidden_params["response_cost"] * 100
+
+    print(f"Non-stream output: {non_stream_output}")
+    print(f"Non-stream usage : {response.usage}")
+    try:
+        print(
+            f"Non-stream cost  : {response._hidden_params['response_cost'] * 100:.4f}"
+        )
+    except TypeError:
+        print(f"Non-stream cost  : NONE")
+    print(f"Non-stream cost  : {completion_cost(response) * 100:.4f} (response)")
+
+    response = router.completion(**kwargs, stream=True)
+    response = stream_chunk_builder(list(response), messages=kwargs["messages"])
+    output = response.choices[0].message.content.replace("\n", "")
+    streaming_cost_calc = completion_cost(response) * 100
+    print(f"Stream output    : {output}")
+
+    if output == non_stream_output:
+        # assert cost is the same
+        assert streaming_cost_calc == non_stream_cost_calc
+    print(f"Stream usage     : {response.usage}")
+    print(f"Stream cost      : {streaming_cost_calc} (response)")
+    print("")
diff --git a/litellm/utils.py b/litellm/utils.py
index b6011cb94..2daf3ec8f 100644
--- a/litellm/utils.py
+++ b/litellm/utils.py
@@ -9694,11 +9694,7 @@ class CustomStreamWrapper:
                 print_verbose(f"completion obj content: {completion_obj['content']}")
                 if response_obj["is_finished"]:
                     self.received_finish_reason = response_obj["finish_reason"]
-                if (
-                    self.stream_options
-                    and self.stream_options.get("include_usage", False) == True
-                    and response_obj["usage"] is not None
-                ):
+                if response_obj["usage"] is not None:
                     model_response.usage = litellm.Usage(
                         prompt_tokens=response_obj["usage"].prompt_tokens,
                         completion_tokens=response_obj["usage"].completion_tokens,
@@ -9712,11 +9708,7 @@ class CustomStreamWrapper:
                 print_verbose(f"completion obj content: {completion_obj['content']}")
                 if response_obj["is_finished"]:
                     self.received_finish_reason = response_obj["finish_reason"]
-                if (
-                    self.stream_options
-                    and self.stream_options.get("include_usage", False) == True
-                    and response_obj["usage"] is not None
-                ):
+                if response_obj["usage"] is not None:
                     model_response.usage = litellm.Usage(
                         prompt_tokens=response_obj["usage"].prompt_tokens,
                         completion_tokens=response_obj["usage"].completion_tokens,
@@ -9784,16 +9776,26 @@ class CustomStreamWrapper:
                 if response_obj["logprobs"] is not None:
                     model_response.choices[0].logprobs = response_obj["logprobs"]
 
-                if (
-                    self.stream_options is not None
-                    and self.stream_options["include_usage"] == True
-                    and response_obj["usage"] is not None
-                ):
-                    model_response.usage = litellm.Usage(
-                        prompt_tokens=response_obj["usage"].prompt_tokens,
-                        completion_tokens=response_obj["usage"].completion_tokens,
-                        total_tokens=response_obj["usage"].total_tokens,
-                    )
+                if response_obj["usage"] is not None:
+                    if isinstance(response_obj["usage"], dict):
+                        model_response.usage = litellm.Usage(
+                            prompt_tokens=response_obj["usage"].get(
+                                "prompt_tokens", None
+                            )
+                            or None,
+                            completion_tokens=response_obj["usage"].get(
+                                "completion_tokens", None
+                            )
+                            or None,
+                            total_tokens=response_obj["usage"].get("total_tokens", None)
+                            or None,
+                        )
+                    elif isinstance(response_obj["usage"], BaseModel):
+                        model_response.usage = litellm.Usage(
+                            prompt_tokens=response_obj["usage"].prompt_tokens,
+                            completion_tokens=response_obj["usage"].completion_tokens,
+                            total_tokens=response_obj["usage"].total_tokens,
+                        )
 
             model_response.model = self.model
             print_verbose(
diff --git a/tests/test_debug_warning.py b/tests/test_debug_warning.py
new file mode 100644
index 000000000..e69de29bb