diff --git a/litellm/llms/anthropic.py b/litellm/llms/anthropic.py
index e078a1ddf..d061d6306 100644
--- a/litellm/llms/anthropic.py
+++ b/litellm/llms/anthropic.py
@@ -7,6 +7,7 @@ from typing import Callable, Optional
 from litellm.utils import ModelResponse, Usage, map_finish_reason, CustomStreamWrapper
 import litellm
 from .prompt_templates.factory import (
+    contains_tag,
     prompt_factory,
     custom_prompt,
     construct_tool_use_system_prompt,
@@ -235,7 +236,7 @@ def completion(
         else:
             text_content = completion_response["content"][0].get("text", None)
             ## TOOL CALLING - OUTPUT PARSE
-            if text_content is not None and "invoke" in text_content:
+            if text_content is not None and contains_tag("invoke", text_content):
                 function_name = extract_between_tags("tool_name", text_content)[0]
                 function_arguments_str = extract_between_tags("invoke", text_content)[
                     0
diff --git a/litellm/llms/prompt_templates/factory.py b/litellm/llms/prompt_templates/factory.py
index c5a6204e5..b23f10315 100644
--- a/litellm/llms/prompt_templates/factory.py
+++ b/litellm/llms/prompt_templates/factory.py
@@ -714,6 +714,8 @@ def extract_between_tags(tag: str, string: str, strip: bool = False) -> List[str
         ext_list = [e.strip() for e in ext_list]
     return ext_list
 
+def contains_tag(tag: str, string: str) -> bool:
+    return bool(re.search(f"<{tag}>(.+?)</{tag}>", string, re.DOTALL))
 
 def parse_xml_params(xml_content):
     root = ET.fromstring(xml_content)