chore: Update anthropic default model (#2551)

* Update AnthropicChatGenerator default model to claude-sonnet-4-5

* Update tests

* Remove fragile check, not all tool calls have thinking prior

* Minor test change

Author: vblagoje

integrations/anthropic/src/haystack_integrations/components/generators/anthropic/chat/chat_generator.py

@@ -64,7 +64,6 @@ class AnthropicChatGenerator:
     from haystack.dataclasses import ChatMessage
 
     generator = AnthropicChatGenerator(
-        model="claude-sonnet-4-20250514",
         generation_kwargs={
             "max_tokens": 1000,
             "temperature": 0.7,
@@ -113,7 +112,7 @@ class AnthropicChatGenerator:
     def __init__(
         self,
         api_key: Secret = Secret.from_env_var("ANTHROPIC_API_KEY"),  # noqa: B008
-        model: str = "claude-sonnet-4-20250514",
+        model: str = "claude-sonnet-4-5",
         streaming_callback: Optional[StreamingCallbackT] = None,
         generation_kwargs: Optional[dict[str, Any]] = None,
         ignore_tools_thinking_messages: bool = True,

integrations/anthropic/tests/conftest.py

@@ -14,7 +14,7 @@ def mock_chat_completion():
         completion = Message(
             id="foo",
             content=[{"type": "text", "text": "Hello, world!"}],
-            model="claude-sonnet-4-20250514",
+            model="claude-sonnet-4-5",
             role="assistant",
             type="message",
             usage={"input_tokens": 57, "output_tokens": 40},
@@ -36,7 +36,7 @@ def mock_chat_completion_extended_thinking():
                 {"type": "thinking", "thinking": "This is a thinking part!", "signature": ""},
                 {"type": "text", "text": "Hello, world!"},
             ],
-            model="claude-sonnet-4-20250514",
+            model="claude-sonnet-4-5",
             role="assistant",
             type="message",
             usage={"input_tokens": 57, "output_tokens": 40},

integrations/anthropic/tests/test_chat_generator.py

@@ -95,7 +95,7 @@ def mock_anthropic_completion():
         completion = Message(
             id="foo",
             type="message",
-            model="claude-sonnet-4-20250514",
+            model="claude-sonnet-4-5",
             role="assistant",
             content=[TextBlockParam(type="text", text="Hello! I'm Claude.")],
             stop_reason="end_turn",
@@ -113,7 +113,7 @@ def test_init_default(self, monkeypatch):
         monkeypatch.setenv("ANTHROPIC_API_KEY", "test-api-key")
         component = AnthropicChatGenerator()
         assert component.client.api_key == "test-api-key"
-        assert component.model == "claude-sonnet-4-20250514"
+        assert component.model == "claude-sonnet-4-5"
         assert component.streaming_callback is None
         assert not component.generation_kwargs
         assert component.tools is None
@@ -146,13 +146,13 @@ def test_init_with_parameters(self, monkeypatch):
         monkeypatch.setenv("OPENAI_MAX_RETRIES", "10")
         component = AnthropicChatGenerator(
             api_key=Secret.from_token("test-api-key"),
-            model="claude-sonnet-4-20250514",
+            model="claude-sonnet-4-5",
             streaming_callback=print_streaming_chunk,
             generation_kwargs={"max_tokens": 10, "some_test_param": "test-params"},
             tools=[tool],
         )
         assert component.client.api_key == "test-api-key"
-        assert component.model == "claude-sonnet-4-20250514"
+        assert component.model == "claude-sonnet-4-5"
         assert component.streaming_callback is print_streaming_chunk
         assert component.generation_kwargs == {"max_tokens": 10, "some_test_param": "test-params"}
         assert component.tools == [tool]
@@ -164,13 +164,13 @@ def test_init_with_parameters_and_env_vars(self, monkeypatch):
         monkeypatch.setenv("OPENAI_TIMEOUT", "100")
         monkeypatch.setenv("OPENAI_MAX_RETRIES", "10")
         component = AnthropicChatGenerator(
-            model="claude-sonnet-4-20250514",
+            model="claude-sonnet-4-5",
             api_key=Secret.from_token("test-api-key"),
             streaming_callback=print_streaming_chunk,
             generation_kwargs={"max_tokens": 10, "some_test_param": "test-params"},
         )
         assert component.client.api_key == "test-api-key"
-        assert component.model == "claude-sonnet-4-20250514"
+        assert component.model == "claude-sonnet-4-5"
         assert component.streaming_callback is print_streaming_chunk
         assert component.generation_kwargs == {"max_tokens": 10, "some_test_param": "test-params"}
 
@@ -185,7 +185,7 @@ def test_to_dict_default(self, monkeypatch):
             "type": "haystack_integrations.components.generators.anthropic.chat.chat_generator.AnthropicChatGenerator",
             "init_parameters": {
                 "api_key": {"env_vars": ["ANTHROPIC_API_KEY"], "type": "env_var", "strict": True},
-                "model": "claude-sonnet-4-20250514",
+                "model": "claude-sonnet-4-5",
                 "streaming_callback": None,
                 "ignore_tools_thinking_messages": True,
                 "generation_kwargs": {},
@@ -204,7 +204,7 @@ def test_to_dict_with_parameters(self, monkeypatch):
         monkeypatch.setenv("ENV_VAR", "test-api-key")
         component = AnthropicChatGenerator(
             api_key=Secret.from_env_var("ENV_VAR"),
-            model="claude-sonnet-4-20250514",
+            model="claude-sonnet-4-5",
             streaming_callback=print_streaming_chunk,
             generation_kwargs={"max_tokens": 10, "some_test_param": "test-params"},
             tools=[tool],
@@ -217,7 +217,7 @@ def test_to_dict_with_parameters(self, monkeypatch):
             "type": "haystack_integrations.components.generators.anthropic.chat.chat_generator.AnthropicChatGenerator",
             "init_parameters": {
                 "api_key": {"env_vars": ["ENV_VAR"], "type": "env_var", "strict": True},
-                "model": "claude-sonnet-4-20250514",
+                "model": "claude-sonnet-4-5",
                 "streaming_callback": "haystack.components.generators.utils.print_streaming_chunk",
                 "ignore_tools_thinking_messages": True,
                 "generation_kwargs": {"max_tokens": 10, "some_test_param": "test-params"},
@@ -261,7 +261,7 @@ def test_from_dict(self, monkeypatch):
             "type": "haystack_integrations.components.generators.anthropic.chat.chat_generator.AnthropicChatGenerator",
             "init_parameters": {
                 "api_key": {"env_vars": ["ANTHROPIC_API_KEY"], "type": "env_var", "strict": True},
-                "model": "claude-sonnet-4-20250514",
+                "model": "claude-sonnet-4-5",
                 "streaming_callback": "haystack.components.generators.utils.print_streaming_chunk",
                 "generation_kwargs": {"max_tokens": 10, "some_test_param": "test-params"},
                 "tools": [
@@ -284,7 +284,7 @@ def test_from_dict(self, monkeypatch):
         component = AnthropicChatGenerator.from_dict(data)
 
         assert isinstance(component, AnthropicChatGenerator)
-        assert component.model == "claude-sonnet-4-20250514"
+        assert component.model == "claude-sonnet-4-5"
         assert component.streaming_callback is print_streaming_chunk
         assert component.generation_kwargs == {"max_tokens": 10, "some_test_param": "test-params"}
         assert component.api_key == Secret.from_env_var("ANTHROPIC_API_KEY")
@@ -301,7 +301,7 @@ def test_from_dict_fail_wo_env_var(self, monkeypatch):
             "type": "haystack_integrations.components.generators.anthropic.chat.chat_generator.AnthropicChatGenerator",
             "init_parameters": {
                 "api_key": {"env_vars": ["ANTHROPIC_API_KEY"], "type": "env_var", "strict": True},
-                "model": "claude-sonnet-4-20250514",
+                "model": "claude-sonnet-4-5",
                 "streaming_callback": "haystack.components.generators.utils.print_streaming_chunk",
                 "generation_kwargs": {"max_tokens": 10, "some_test_param": "test-params"},
             },
@@ -341,7 +341,7 @@ def test_run_with_params(self, chat_messages, mock_anthropic_completion):
         assert len(response["replies"]) == 1
         assert isinstance(response["replies"][0], ChatMessage)
         assert "Hello! I'm Claude." in response["replies"][0].text
-        assert response["replies"][0].meta["model"] == "claude-sonnet-4-20250514"
+        assert response["replies"][0].meta["model"] == "claude-sonnet-4-5"
         assert response["replies"][0].meta["finish_reason"] == "stop"
 
     def test_check_duplicate_tool_names(self, tools):
@@ -358,7 +358,7 @@ def test_convert_chat_completion_to_chat_message(self, mock_chat_completion):
         chat_message = _convert_chat_completion_to_chat_message(chat_completion, ignore_tools_thinking_messages=True)
         assert chat_message.text == "Hello, world!"
         assert chat_message.role == "assistant"
-        assert chat_message.meta["model"] == "claude-sonnet-4-20250514"
+        assert chat_message.meta["model"] == "claude-sonnet-4-5"
         assert "usage" in chat_message.meta
         assert chat_message.meta["usage"]["prompt_tokens"] == 57
         assert chat_message.meta["usage"]["completion_tokens"] == 40
@@ -376,7 +376,7 @@ def test_convert_chat_completion_to_chat_message_with_reasoning_and_tool_call(se
                     id="toolu_01XEkx", input={"expression": "7 * (4 + 2)"}, name="calculator", type="tool_use"
                 ),
             ],
-            model="claude-sonnet-4-20250514",
+            model="claude-sonnet-4-5",
             role="assistant",
             stop_reason="tool_use",
             stop_sequence=None,
@@ -391,7 +391,7 @@ def test_convert_chat_completion_to_chat_message_with_reasoning_and_tool_call(se
                 {"reasoning_content": {"reasoning_text": {"text": "User has asked 2 questions", "signature": "sign1"}}}
             ]
         }
-        assert chat_message.meta["model"] == "claude-sonnet-4-20250514"
+        assert chat_message.meta["model"] == "claude-sonnet-4-5"
         assert chat_message.meta["finish_reason"] == "tool_calls"
         assert "usage" in chat_message.meta
         assert chat_message.meta["usage"]["prompt_tokens"] == 507
@@ -411,7 +411,7 @@ def test_convert_anthropic_completion_chunks_with_multiple_tool_calls_and_reason
             message=Message(
                 id="msg_01ApGaijiGeLtxWLCKUKELfT",
                 content=[],
-                model="claude-sonnet-4-20250514",
+                model="claude-sonnet-4-5",
                 role="assistant",
                 stop_reason=None,
                 stop_sequence=None,
@@ -728,7 +728,7 @@ def test_convert_streaming_chunks_to_chat_message_with_multiple_tool_calls(self)
                         "type": "message",
                         "role": "assistant",
                         "content": [],
-                        "model": "claude-sonnet-4-20250514",
+                        "model": "claude-sonnet-4-5",
                         "stop_reason": None,
                         "stop_sequence": None,
                         "usage": {"input_tokens": 25, "output_tokens": 0},
@@ -888,7 +888,7 @@ def test_convert_streaming_chunks_to_chat_message_tool_call_with_empty_arguments
                         "type": "message",
                         "role": "assistant",
                         "content": [],
-                        "model": "claude-sonnet-4-20250514",
+                        "model": "claude-sonnet-4-5",
                         "stop_reason": None,
                         "stop_sequence": None,
                         "usage": {"input_tokens": 25, "output_tokens": 0},
@@ -986,7 +986,7 @@ def test_serde_in_pipeline(self):
 
         generator = AnthropicChatGenerator(
             api_key=Secret.from_env_var("ANTHROPIC_API_KEY", strict=False),
-            model="claude-sonnet-4-20250514",
+            model="claude-sonnet-4-5",
             generation_kwargs={"temperature": 0.6},
             tools=[tool],
         )
@@ -1006,7 +1006,7 @@ def test_serde_in_pipeline(self):
                     "type": type_,
                     "init_parameters": {
                         "api_key": {"type": "env_var", "env_vars": ["ANTHROPIC_API_KEY"], "strict": False},
-                        "model": "claude-sonnet-4-20250514",
+                        "model": "claude-sonnet-4-5",
                         "generation_kwargs": {"temperature": 0.6},
                         "ignore_tools_thinking_messages": True,
                         "streaming_callback": None,
@@ -1068,7 +1068,7 @@ def test_live_run(self):
         assert len(results["replies"]) == 1
         message: ChatMessage = results["replies"][0]
         assert "Paris" in message.text
-        assert "claude-sonnet-4-20250514" in message.meta["model"]
+        assert "claude-sonnet-4-5" in message.meta["model"]
         assert message.meta["finish_reason"] == "stop"
 
     @pytest.mark.skipif(
@@ -1110,7 +1110,7 @@ def __call__(self, chunk: StreamingChunk) -> None:
         message: ChatMessage = results["replies"][0]
         assert "Paris" in message.text
 
-        assert "claude-sonnet-4-20250514" in message.meta["model"]
+        assert "claude-sonnet-4-5" in message.meta["model"]
         assert message.meta["finish_reason"] == "stop"
         assert callback.counter > 1
         assert "Paris" in callback.responses
@@ -1527,11 +1527,6 @@ def test_live_run_with_tools_streaming(self, tools):
         assert len(results["replies"]) == 1
         message = results["replies"][0]
 
-        # this is Anthropic message prior to tool call
-        assert message.text is not None
-        assert "weather" in message.text.lower()
-        assert "paris" in message.text.lower()
-
         # now we have the tool call
         assert message.tool_calls
         tool_call = message.tool_call
@@ -1621,9 +1616,6 @@ def test_live_run_with_tool_with_no_args_streaming(self, tool_with_no_parameters
         assert len(results["replies"]) == 1
         message = results["replies"][0]
 
-        # this is Anthropic thinking message prior to tool call
-        assert message.text is not None
-
         # now we have the tool call
         assert message.tool_calls
         tool_call = message.tool_call
@@ -1884,7 +1876,7 @@ def test_from_dict_with_prompt_caching(self, monkeypatch):
             "type": "haystack_integrations.components.generators.anthropic.chat.chat_generator.AnthropicChatGenerator",
             "init_parameters": {
                 "api_key": {"env_vars": ["ANTHROPIC_API_KEY"], "strict": True, "type": "env_var"},
-                "model": "claude-sonnet-4-20250514",
+                "model": "claude-sonnet-4-5",
                 "generation_kwargs": {"extra_headers": {"anthropic-beta": "prompt-caching-2024-07-31"}},
             },
         }
@@ -2029,7 +2021,7 @@ def test_prompt_caching_live_run_with_user_message(self, cache_enabled):
     @pytest.mark.integration
     def test_live_run_with_reasoning(self, streaming_callback):
         chat_generator = AnthropicChatGenerator(
-            model="claude-sonnet-4-20250514",
+            model="claude-sonnet-4-5",
             generation_kwargs={"thinking": {"type": "enabled", "budget_tokens": 10000}, "max_tokens": 11000},
             streaming_callback=streaming_callback,
         )
@@ -2114,7 +2106,7 @@ async def mock_anthropic_completion_async(self):
             completion = Message(
                 id="foo",
                 type="message",
-                model="claude-sonnet-4-20250514",
+                model="claude-sonnet-4-5",
                 role="assistant",
                 content=[TextBlockParam(type="text", text="Hello! I'm Claude.")],
                 stop_reason="end_turn",
@@ -2130,7 +2122,7 @@ async def mock_anthropic_completion_async_with_tool(self):
             completion = Message(
                 id="foo",
                 type="message",
-                model="claude-sonnet-4-20250514",
+                model="claude-sonnet-4-5",
                 role="assistant",
                 content=[
                     TextBlockParam(type="text", text="Let me check the weather for you."),
@@ -2181,7 +2173,7 @@ async def test_run_async_with_params(self, chat_messages, mock_anthropic_complet
         assert len(response["replies"]) == 1
         assert isinstance(response["replies"][0], ChatMessage)
         assert "Hello! I'm Claude." in response["replies"][0].text
-        assert response["replies"][0].meta["model"] == "claude-sonnet-4-20250514"
+        assert response["replies"][0].meta["model"] == "claude-sonnet-4-5"
         assert response["replies"][0].meta["finish_reason"] == "stop"
         assert "completion_tokens" in response["replies"][0].meta["usage"]
 
@@ -2200,7 +2192,7 @@ async def test_live_run_async(self):
         assert len(results["replies"]) == 1
         message: ChatMessage = results["replies"][0]
         assert "Paris" in message.text
-        assert "claude-sonnet-4-20250514" in message.meta["model"]
+        assert "claude-sonnet-4-5" in message.meta["model"]
         assert message.meta["finish_reason"] == "stop"
         assert "completion_tokens" in message.meta["usage"]
 
@@ -2236,7 +2228,7 @@ async def callback(chunk: StreamingChunk) -> None:
         assert len(results["replies"]) == 1
         message = results["replies"][0]
         assert "paris" in message.text.lower()
-        assert "claude-sonnet-4-20250514" in message.meta["model"]
+        assert "claude-sonnet-4-5" in message.meta["model"]
         assert message.meta["finish_reason"] == "stop"
         assert "input_tokens" in message.meta["usage"]
         assert "output_tokens" in message.meta["usage"]

integrations/anthropic/tests/test_vertex_chat_generator.py

@@ -208,7 +208,7 @@ async def test_live_run_async(self):
         assert len(results["replies"]) == 1
         message: ChatMessage = results["replies"][0]
         assert "Paris" in message.text
-        assert "claude-sonnet-4-20250514" in message.meta["model"]
+        assert "claude-sonnet-4-5" in message.meta["model"]
         assert message.meta["finish_reason"] == "stop"
 
     # Anthropic messages API is similar for AnthropicVertex and Anthropic endpoint,