From 8b4a74a69c14b1a806d7e332cf371303de8c52f2 Mon Sep 17 00:00:00 2001
From: Chesars <cesarponce19544@gmail.com>
Date: Tue, 17 Mar 2026 18:06:42 -0300
Subject: [PATCH] fix(core): map Anthropic 'refusal' finish reason to
 'content_filter'
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Anthropic's 'refusal' stop_reason was missing from _FINISH_REASON_MAP,
causing it to fall through to the default 'stop' — hiding the fact that
the model refused to respond due to safety policies.

Fixes #23793
---
 litellm/litellm_core_utils/core_helpers.py                 | 1 +
 tests/test_litellm/litellm_core_utils/test_core_helpers.py | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/litellm/litellm_core_utils/core_helpers.py b/litellm/litellm_core_utils/core_helpers.py
index ee111f35929..9d9255cdf15 100644
--- a/litellm/litellm_core_utils/core_helpers.py
+++ b/litellm/litellm_core_utils/core_helpers.py
@@ -64,6 +64,7 @@ _FINISH_REASON_MAP: dict[str, OpenAIChatCompletionFinishReason] = {
     "end_turn": "stop",
     "max_tokens": "length",
     "tool_use": "tool_calls",
+    "refusal": "content_filter",
     "compaction": "length",
     # Cohere
     "COMPLETE": "stop",
diff --git a/tests/test_litellm/litellm_core_utils/test_core_helpers.py b/tests/test_litellm/litellm_core_utils/test_core_helpers.py
index 0ef76e0942d..134ed5d25f8 100644
--- a/tests/test_litellm/litellm_core_utils/test_core_helpers.py
+++ b/tests/test_litellm/litellm_core_utils/test_core_helpers.py
@@ -74,6 +74,9 @@ class TestMapFinishReasonAnthropic:
     def test_compaction(self):
         assert map_finish_reason("compaction") == "length"
 
+    def test_refusal(self):
+        assert map_finish_reason("refusal") == "content_filter"
+
 
 class TestMapFinishReasonGemini:
     @pytest.mark.parametrize(