feat: make converse as default api flavor for bedrock

packages/uipath_langchain_client/CHANGELOG.md

@@ -2,6 +2,14 @@
 
 All notable changes to `uipath_langchain_client` will be documented in this file.
 
+## [1.12.0] - 2026-05-21
+
+### Changed
+- `get_chat_model` routes the AWSBEDROCK branch purely by `api_flavor`: `ApiFlavor.INVOKE` selects `UiPathChatBedrock`, while `None` or `ApiFlavor.CONVERSE` select `UiPathChatBedrockConverse`. Model family no longer influences the choice.
+
+### Removed
+- The AWSBEDROCK branch no longer auto-selects `UiPathChatAnthropicBedrock` for `ANTHROPIC_CLAUDE` models. Callers who want that class can pass it via the `custom_class` kwarg.
+
 ## [1.11.3] - 2026-05-21
 
 ### Fixed

packages/uipath_langchain_client/src/uipath_langchain_client/__version__.py

@@ -1,3 +1,3 @@
 __title__ = "UiPath LangChain Client"
 __description__ = "A Python client for interacting with UiPath's LLM services via LangChain."
-__version__ = "1.11.3"
+__version__ = "1.12.0"

packages/uipath_langchain_client/src/uipath_langchain_client/factory.py

@@ -22,7 +22,6 @@
 
 from typing import Any
 
-from uipath.llm_client.utils.model_family import is_anthropic_model_name
 from uipath_langchain_client.base_client import (
     UiPathBaseChatModel,
     UiPathBaseEmbeddings,
@@ -65,9 +64,8 @@ def get_chat_model(
             If not provided, auto-detected from the model discovery endpoint.
         api_flavor: Vendor-specific API flavor to use. Effects:
             - OpenAI: ApiFlavor.RESPONSES sets use_responses_api=True.
-            - Bedrock Claude: Default uses UiPathChatAnthropicBedrock.
-              ApiFlavor.CONVERSE uses UiPathChatBedrockConverse,
-              ApiFlavor.INVOKE uses UiPathChatBedrock.
+            - Bedrock: ApiFlavor.INVOKE uses UiPathChatBedrock; otherwise
+              (None or ApiFlavor.CONVERSE) uses UiPathChatBedrockConverse.
         custom_class: A custom class to use for instantiating the chat model instead of the
             auto-detected one. Must be a subclass of UiPathBaseChatModel. When provided,
             the factory skips vendor detection and uses this class directly.
@@ -190,21 +188,6 @@ def get_chat_model(
                 **model_kwargs,
             )
         case VendorType.AWSBEDROCK:
-            if (
-                model_family == ModelFamily.ANTHROPIC_CLAUDE and api_flavor != ApiFlavor.CONVERSE
-            ) or (api_flavor == ApiFlavor.INVOKE and is_anthropic_model_name(model_name)):
-                from uipath_langchain_client.clients.bedrock.chat_models import (
-                    UiPathChatAnthropicBedrock,
-                )
-
-                return UiPathChatAnthropicBedrock(
-                    model=model_name,
-                    settings=client_settings,
-                    byo_connection_id=byo_connection_id,
-                    model_details=model_details,
-                    **model_kwargs,
-                )
-
             if api_flavor == ApiFlavor.INVOKE:
                 from uipath_langchain_client.clients.bedrock.chat_models import (
                     UiPathChatBedrock,

tests/langchain/features/test_factory_function.py

@@ -130,6 +130,94 @@ def test_openai_chat_respects_discovered_byom_chat_completions(
         assert captured["api_flavor"] == ApiFlavor.CHAT_COMPLETIONS
 
 
+class TestFactoryBedrockApiFlavorRouting:
+    """The AWSBEDROCK branch routes purely on ``api_flavor``:
+
+    - ``ApiFlavor.INVOKE`` -> ``UiPathChatBedrock``
+    - ``ApiFlavor.CONVERSE`` or ``None`` -> ``UiPathChatBedrockConverse``
+
+    Model family (e.g. ANTHROPIC_CLAUDE) no longer influences the choice.
+    """
+
+    def _patch_bedrock_classes(self, monkeypatch: pytest.MonkeyPatch) -> dict:
+        """Replace the three bedrock chat classes with sentinels and record which one was built."""
+        chosen: dict = {}
+
+        def _make_stub(name: str):
+            class _Stub:
+                def __init__(self, **kwargs):
+                    chosen["class"] = name
+                    chosen["kwargs"] = kwargs
+
+            return _Stub
+
+        for name in (
+            "UiPathChatBedrockConverse",
+            "UiPathChatBedrock",
+            "UiPathChatAnthropicBedrock",
+        ):
+            monkeypatch.setattr(
+                f"uipath_langchain_client.clients.bedrock.chat_models.{name}",
+                _make_stub(name),
+            )
+        return chosen
+
+    def _settings_with_model_info(self, model_info: dict):
+        settings = MagicMock()
+        settings.get_model_info.return_value = model_info
+        return settings
+
+    def test_no_api_flavor_uses_bedrock_converse(self, monkeypatch: pytest.MonkeyPatch):
+        chosen = self._patch_bedrock_classes(monkeypatch)
+        settings = self._settings_with_model_info(
+            {
+                "modelName": "anthropic.claude-3-5-sonnet-20240620-v1:0",
+                "vendor": "AwsBedrock",
+                "apiFlavor": None,
+                "modelFamily": None,
+            }
+        )
+        get_chat_model(
+            model_name="anthropic.claude-3-5-sonnet-20240620-v1:0",
+            client_settings=settings,
+        )
+        assert chosen["class"] == "UiPathChatBedrockConverse"
+
+    def test_converse_api_flavor_uses_bedrock_converse(self, monkeypatch: pytest.MonkeyPatch):
+        chosen = self._patch_bedrock_classes(monkeypatch)
+        settings = self._settings_with_model_info(
+            {
+                "modelName": "anthropic.claude-3-5-sonnet-20240620-v1:0",
+                "vendor": "AwsBedrock",
+                "apiFlavor": None,
+                "modelFamily": None,
+            }
+        )
+        get_chat_model(
+            model_name="anthropic.claude-3-5-sonnet-20240620-v1:0",
+            client_settings=settings,
+            api_flavor=ApiFlavor.CONVERSE,
+        )
+        assert chosen["class"] == "UiPathChatBedrockConverse"
+
+    def test_invoke_api_flavor_uses_bedrock_invoke(self, monkeypatch: pytest.MonkeyPatch):
+        chosen = self._patch_bedrock_classes(monkeypatch)
+        settings = self._settings_with_model_info(
+            {
+                "modelName": "amazon.titan-text-express-v1",
+                "vendor": "AwsBedrock",
+                "apiFlavor": None,
+                "modelFamily": None,
+            }
+        )
+        get_chat_model(
+            model_name="amazon.titan-text-express-v1",
+            client_settings=settings,
+            api_flavor=ApiFlavor.INVOKE,
+        )
+        assert chosen["class"] == "UiPathChatBedrock"
+
+
 class TestFactoryAgentHubConfig:
     """The ``agenthub_config`` factory kwarg overrides ``client_settings.agenthub_config``
     via ``model_copy`` so the caller's instance is not mutated."""