From f736ac8891557cf85e72c579cabad8db35c61c45 Mon Sep 17 00:00:00 2001
From: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Date: Tue, 20 Oct 2026 08:52:06 +0000
Subject: [PATCH] fix: preserve dict-compatible drop params access

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
---
 litellm/llms/anthropic/pass_through/messages/transformation.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/litellm/llms/anthropic/pass_through/messages/transformation.py b/litellm/llms/anthropic/pass_through/messages/transformation.py
index 9aadd954423..0e8c1b49e8e 100644
--- a/litellm/llms/anthropic/pass_through/messages/transformation.py
+++ b/litellm/llms/anthropic/pass_through/messages/transformation.py
@@ -694,7 +694,7 @@ class AnthropicMessagesConfig(BaseAnthropicMessagesConfig):
 
         anthropic_messages_request: Final[AnthropicMessagesRequest] = AnthropicMessagesRequest(
             messages=strip_encrypted_reasoning_blocks_from_anthropic_messages(
-                drop_non_string_tool_result_texts(messages, litellm_params.drop_params)
+                drop_non_string_tool_result_texts(messages, getattr(litellm_params, "drop_params", None))
             ),
             max_tokens=max_tokens,
             model=model,