diff --git a/src/google/adk/models/__init__.py b/src/google/adk/models/__init__.py
index 5541bd563b..6756b20d2c 100644
--- a/src/google/adk/models/__init__.py
+++ b/src/google/adk/models/__init__.py
@@ -67,7 +67,10 @@
     # Gemma 3 only (function-calling workarounds). Gemma 4+ resolves to Gemini.
     'Gemma': ([r'gemma-.*'], 'gemma_llm'),
     'ApigeeLlm': ([r'apigee\/.*'], 'apigee_llm'),
-    'Claude': ([r'claude-3-.*', r'claude-.*-4.*'], 'anthropic_llm'),
+    'Claude': (
+        [r'claude-3-.*', r'claude-.*-4.*', r'claude-.*-5.*'],
+        'anthropic_llm',
+    ),
     'Gemma3Ollama': ([r'ollama/gemma3.*'], 'gemma_llm'),
     'OpenAILlm': (
         [r'gpt-.*', r'o\d+-.*'],
diff --git a/src/google/adk/models/anthropic_llm.py b/src/google/adk/models/anthropic_llm.py
index 49113c6e1f..d925b772c1 100644
--- a/src/google/adk/models/anthropic_llm.py
+++ b/src/google/adk/models/anthropic_llm.py
@@ -651,7 +651,7 @@ class AnthropicLlm(BaseLlm):
   @classmethod
   @override
   def supported_models(cls) -> list[str]:
-    return [r"claude-3-.*", r"claude-.*-4.*"]
+    return [r"claude-3-.*", r"claude-.*-4.*", r"claude-.*-5.*"]
 
   def _resolve_model_name(self, model: Optional[str]) -> str:
     if not model:
diff --git a/tests/unittests/models/test_anthropic_llm.py b/tests/unittests/models/test_anthropic_llm.py
index 0dafa12188..3404a69e26 100644
--- a/tests/unittests/models/test_anthropic_llm.py
+++ b/tests/unittests/models/test_anthropic_llm.py
@@ -142,9 +142,10 @@ def test_claude_anthropic_client_creation_with_full_resource_name():
 
 def test_supported_models():
   models = Claude.supported_models()
-  assert len(models) == 2
+  assert len(models) == 3
   assert models[0] == r"claude-3-.*"
   assert models[1] == r"claude-.*-4.*"
+  assert models[2] == r"claude-.*-5.*"
 
 
 function_declaration_test_cases = [
diff --git a/tests/unittests/models/test_models.py b/tests/unittests/models/test_models.py
index 2d4febb553..0365e7a623 100644
--- a/tests/unittests/models/test_models.py
+++ b/tests/unittests/models/test_models.py
@@ -48,6 +48,15 @@ def test_match_gemini_family(model_name):
         'claude-3-sonnet@20240229',
         'claude-sonnet-4@20250514',
         'claude-opus-4@20250514',
+        'claude-sonnet-4-5',
+        'claude-haiku-4-5',
+        'claude-sonnet-4-6',
+        'claude-opus-4-6',
+        'claude-opus-4-7',
+        'claude-opus-4-8',
+        'claude-opus-5',
+        'claude-sonnet-5',
+        'claude-fable-5',
     ],
 )
 def test_match_claude_family(model_name):