diff --git a/litellm/anthropic_beta_headers_manager.py b/litellm/anthropic_beta_headers_manager.py
index efa57ca0586..97d223088fa 100644
--- a/litellm/anthropic_beta_headers_manager.py
+++ b/litellm/anthropic_beta_headers_manager.py
@@ -367,6 +367,42 @@ def update_headers_with_filtered_beta(
     return headers
 
 
+def update_request_with_filtered_beta(
+    headers: dict,
+    request_data: dict,
+    provider: str,
+) -> tuple[dict, dict]:
+    """
+    Update both headers and request body beta fields based on provider support.
+    Modifies both dicts in place and returns them.
+
+    Args:
+        headers: Request headers dict (will be modified in place)
+        request_data: Request body dict (will be modified in place)
+        provider: Provider name
+
+    Returns:
+        Tuple of (updated headers, updated request_data)
+    """
+    headers = update_headers_with_filtered_beta(headers=headers, provider=provider)
+
+    existing_body_betas = request_data.get("anthropic_beta")
+    if not existing_body_betas:
+        return headers, request_data
+
+    filtered_body_betas = filter_and_transform_beta_headers(
+        beta_headers=existing_body_betas,
+        provider=provider,
+    )
+
+    if filtered_body_betas:
+        request_data["anthropic_beta"] = filtered_body_betas
+    else:
+        request_data.pop("anthropic_beta", None)
+
+    return headers, request_data
+
+
 def get_unsupported_headers(provider: str) -> List[str]:
     """
     Get all beta headers that are unsupported by a provider (have null values in mapping).
diff --git a/litellm/llms/anthropic/chat/handler.py b/litellm/llms/anthropic/chat/handler.py
index 72cc7ecd9cc..5eebebc2e23 100644
--- a/litellm/llms/anthropic/chat/handler.py
+++ b/litellm/llms/anthropic/chat/handler.py
@@ -23,6 +23,9 @@
 import litellm.litellm_core_utils
 import litellm.types
 import litellm.types.utils
+from litellm.anthropic_beta_headers_manager import (
+    update_request_with_filtered_beta,
+)
 from litellm.constants import RESPONSE_FORMAT_TOOL_NAME
 from litellm.litellm_core_utils.core_helpers import map_finish_reason
 from litellm.llms.custom_httpx.http_handler import (
@@ -58,9 +61,6 @@
 
 from ...base import BaseLLM
 from ..common_utils import AnthropicError, process_anthropic_headers
-from litellm.anthropic_beta_headers_manager import (
-    update_headers_with_filtered_beta,
-)
 from .transformation import AnthropicConfig
 
 if TYPE_CHECKING:
@@ -339,10 +339,6 @@ def completion(
             litellm_params=litellm_params,
         )
 
-        headers = update_headers_with_filtered_beta(
-            headers=headers, provider=custom_llm_provider
-        )
-
         config = ProviderConfigManager.get_provider_chat_config(
             model=model,
             provider=LlmProviders(custom_llm_provider),
@@ -360,6 +356,12 @@ def completion(
             headers=headers,
         )
 
+        headers, data = update_request_with_filtered_beta(
+            headers=headers,
+            request_data=data,
+            provider=custom_llm_provider,
+        )
+
         ## LOGGING
         logging_obj.pre_call(
             input=messages,
diff --git a/tests/test_litellm/test_anthropic_beta_headers_filtering.py b/tests/test_litellm/test_anthropic_beta_headers_filtering.py
index a2c5608828a..447419b27d7 100644
--- a/tests/test_litellm/test_anthropic_beta_headers_filtering.py
+++ b/tests/test_litellm/test_anthropic_beta_headers_filtering.py
@@ -17,6 +17,7 @@
 import litellm
 from litellm.anthropic_beta_headers_manager import (
     filter_and_transform_beta_headers,
+    update_request_with_filtered_beta,
 )
 
 
@@ -116,6 +117,32 @@ def test_unknown_headers_filtered_out(self, provider):
                 unknown not in filtered
             ), f"Unknown header '{unknown}' should be filtered out for {provider}"
 
+    def test_update_request_with_filtered_beta_vertex_ai(self):
+        """Test combined filtering for both HTTP headers and request body betas."""
+        headers = {
+            "anthropic-beta": "files-api-2025-04-14,context-management-2025-06-27,code-execution-2025-05-22"
+        }
+        request_data = {
+            "anthropic_beta": [
+                "files-api-2025-04-14",
+                "context-management-2025-06-27",
+                "code-execution-2025-05-22",
+            ]
+        }
+
+        filtered_headers, filtered_request_data = update_request_with_filtered_beta(
+            headers=headers,
+            request_data=request_data,
+            provider="vertex_ai",
+        )
+
+        assert (
+            filtered_headers.get("anthropic-beta") == "context-management-2025-06-27"
+        )
+        assert filtered_request_data.get("anthropic_beta") == [
+            "context-management-2025-06-27"
+        ]
+
     @pytest.mark.asyncio
     async def test_anthropic_messages_http_headers_filtering(self):
         """Test that Anthropic messages API filters HTTP headers correctly."""