diff --git a/litellm/llms/custom_httpx/llm_http_handler.py b/litellm/llms/custom_httpx/llm_http_handler.py
index b4f2a74b3e6..50420ab3301 100644
--- a/litellm/llms/custom_httpx/llm_http_handler.py
+++ b/litellm/llms/custom_httpx/llm_http_handler.py
@@ -4,6 +4,7 @@ import ssl
 from collections.abc import AsyncIterator, Coroutine, Iterator, Mapping, Sequence
 from contextlib import asynccontextmanager
 from functools import lru_cache
+from itertools import chain
 from types import MappingProxyType, ModuleType
 from typing import TYPE_CHECKING, Any, Final, Literal, Optional, TypedDict, TypeVar, Union, cast, get_type_hints
 from urllib.parse import parse_qs, urlencode, urlparse, urlunparse
@@ -5572,20 +5573,29 @@ class BaseLLMHTTPHandler:
         }
 
         internal_keys: Final = {"litellm_logging_obj"}
-        kwargs_for_followup: Final = {
-            **{
-                k: v
-                for k, v in kwargs.items()
-                if not is_interception_internal_key(k, prefixes=NON_CODE_INTERPRETER_INTERCEPTION_INTERNAL_PREFIXES)
-                and k != "_code_interpreter_interception_converted_stream"
-                and k not in internal_keys
-                and k not in optional_params
-            },
-            **{k: v for k, v in patch.kwargs.items() if k not in optional_params},
-            "_agentic_loop_depth": depth + 1,
-            "max_agentic_loops": max_loops,
-            "_agentic_loop_fingerprints": fingerprints + [fingerprint],
-        }
+        kwargs_for_followup: Final = MappingProxyType(
+            {
+                key: value
+                for key, value in chain(
+                    (
+                        (k, v)
+                        for k, v in kwargs.items()
+                        if not is_interception_internal_key(
+                            k, prefixes=NON_CODE_INTERPRETER_INTERCEPTION_INTERNAL_PREFIXES
+                        )
+                        and k != "_code_interpreter_interception_converted_stream"
+                        and k not in internal_keys
+                        and k not in optional_params
+                    ),
+                    ((k, v) for k, v in patch.kwargs.items() if k not in optional_params),
+                    (
+                        ("_agentic_loop_depth", depth + 1),
+                        ("max_agentic_loops", max_loops),
+                        ("_agentic_loop_fingerprints", fingerprints + [fingerprint]),
+                    ),
+                )
+            }
+        )
 
         try:
             response: ResponsesAPIResponse | BaseResponsesAPIStreamingIterator = await litellm.aresponses(