Update default Anthropic model to claude-haiku-4-5-latest

- Add Claude 4.5 models to AnthropicModel type (claude-sonnet-4-5-latest, claude-sonnet-4-5-20250929, claude-haiku-4-5-latest)
- Change DEFAULT_MODEL from claude-3-7-sonnet-latest to claude-haiku-4-5-latest
- Update test assertions to reflect new default model

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

graphiti_core/llm_client/anthropic_client.py

@@ -47,6 +47,9 @@ else:
 logger = logging.getLogger(__name__)
 
 AnthropicModel = Literal[
+    'claude-sonnet-4-5-latest',
+    'claude-sonnet-4-5-20250929',
+    'claude-haiku-4-5-latest',
     'claude-3-7-sonnet-latest',
     'claude-3-7-sonnet-20250219',
     'claude-3-5-haiku-latest',
@@ -62,7 +65,7 @@ AnthropicModel = Literal[
     'claude-2.0',
 ]
 
-DEFAULT_MODEL: AnthropicModel = 'claude-3-7-sonnet-latest'
+DEFAULT_MODEL: AnthropicModel = 'claude-haiku-4-5-latest'
 
 # Maximum output tokens for different Anthropic models
 # Based on official Anthropic documentation (as of 2025)

tests/llm_client/test_anthropic_client.py

@@ -81,7 +81,7 @@ class TestAnthropicClientInitialization:
         config = LLMConfig(api_key='test_api_key')
         client = AnthropicClient(config=config, cache=False)
 
-        assert client.model == 'claude-3-7-sonnet-latest'
+        assert client.model == 'claude-haiku-4-5-latest'
 
     @patch.dict(os.environ, {'ANTHROPIC_API_KEY': 'env_api_key'})
     def test_init_without_config(self):
@@ -89,7 +89,7 @@ class TestAnthropicClientInitialization:
         client = AnthropicClient(cache=False)
 
         assert client.config.api_key == 'env_api_key'
-        assert client.model == 'claude-3-7-sonnet-latest'
+        assert client.model == 'claude-haiku-4-5-latest'
 
     def test_init_with_custom_client(self):
         """Test initialization with a custom AsyncAnthropic client."""