diff --git a/src/askui/models/anthropic/messages_api.py b/src/askui/models/anthropic/messages_api.py
index 6a8d348a..6866f7e9 100644
--- a/src/askui/models/anthropic/messages_api.py
+++ b/src/askui/models/anthropic/messages_api.py
@@ -1,4 +1,5 @@
 import json
+from functools import cached_property
 from typing import Type, cast
 
 from anthropic import NOT_GIVEN, Anthropic, NotGiven
@@ -80,29 +81,23 @@ def __init__(self, message: str, content: list[ContentBlockParam]) -> None:
         super().__init__(self.message)
 
 
-class AnthropicMessagesApiSettingsBase(BaseSettings):
-    model_config = SettingsConfigDict(validate_by_name=True, env_prefix="ANTHROPIC_")
-
-    messages: MessageSettings = Field(default_factory=MessageSettings)
-    resolution: tuple[int, int] = Field(
-        default_factory=lambda: (1280, 800),
-        description="The resolution of the screen to use for the model",
+class AnthropicMessagesApiSettings(BaseSettings):
+    model_config = SettingsConfigDict(
+        validate_by_name=True,
+        env_prefix="ANTHROPIC__",
+        env_nested_delimiter="__",
     )
 
-
-AnthropicMessagesApiUnauthorizedSettings = AnthropicMessagesApiSettingsBase
-
-
-class AnthropicMessagesApiAuthorizedSettings(AnthropicMessagesApiSettingsBase):
     api_key: SecretStr = Field(
         default=...,
         min_length=1,
+        validation_alias="ANTHROPIC_API_KEY",
+    )
+    messages: MessageSettings = Field(default_factory=MessageSettings)
+    resolution: tuple[int, int] = Field(
+        default_factory=lambda: (1280, 800),
+        description="The resolution of the screen to use for the model",
     )
-
-
-AnthropicMessagesApiSettings = (
-    AnthropicMessagesApiAuthorizedSettings | AnthropicMessagesApiUnauthorizedSettings
-)
 
 
 class AnthropicMessagesApi(LocateModel, GetModel, MessagesApi):
@@ -111,15 +106,17 @@ def __init__(
         locator_serializer: VlmLocatorSerializer,
         settings: AnthropicMessagesApiSettings | None = None,
     ) -> None:
-        self._settings = settings or AnthropicMessagesApiUnauthorizedSettings()
+        self._settings_default = settings
         self._locator_serializer = locator_serializer
 
-    @property
+    @cached_property
+    def _settings(self) -> AnthropicMessagesApiSettings:
+        if self._settings_default is None:
+            return AnthropicMessagesApiSettings()
+        return self._settings_default
+
+    @cached_property
     def _client(self) -> Anthropic:
-        if not isinstance(self._settings, AnthropicMessagesApiAuthorizedSettings):
-            self._settings = AnthropicMessagesApiAuthorizedSettings.model_validate(
-                self._settings.model_dump()
-            )
         return Anthropic(api_key=self._settings.api_key.get_secret_value())
 
     @override
diff --git a/src/askui/models/askui/inference_api.py b/src/askui/models/askui/inference_api.py
index 5553876d..1880d017 100644
--- a/src/askui/models/askui/inference_api.py
+++ b/src/askui/models/askui/inference_api.py
@@ -1,5 +1,6 @@
 import base64
 import json as json_lib
+from functools import cached_property
 from typing import Any, Type
 
 import httpx
@@ -37,24 +38,25 @@ def _is_retryable_error(exception: BaseException) -> bool:
     return False
 
 
-class AskUiInferenceApiSettingsBase(BaseSettings):
-    model_config = SettingsConfigDict(validate_by_name=True, env_prefix="ASKUI_")
+class AskUiInferenceApiSettings(BaseSettings):
+    model_config = SettingsConfigDict(
+        validate_by_name=True,
+        env_prefix="ASKUI__",
+        env_nested_delimiter="__",
+    )
 
     inference_endpoint: HttpUrl = Field(
         default_factory=lambda: HttpUrl("https://inference.askui.com"),  # noqa: F821
+        validation_alias="ASKUI_INFERENCE_ENDPOINT",
     )
     messages: MessageSettings = Field(default_factory=MessageSettings)
-
-
-AskUiInferenceApiSettingsUnauthorized = AskUiInferenceApiSettingsBase
-
-
-class AskUiInferenceApiAuthorizedSettings(AskUiInferenceApiSettingsBase):
     token: SecretStr = Field(
         default=...,
+        validation_alias="ASKUI_TOKEN",
     )
     workspace_id: UUID4 = Field(
         default=...,
+        validation_alias="ASKUI_WORKSPACE_ID",
     )
 
     @property
@@ -71,26 +73,23 @@ def base_url(self) -> str:
         return f"{self.inference_endpoint}api/v1/workspaces/{self.workspace_id}"
 
 
-AskUiInferenceApiSettings = (
-    AskUiInferenceApiAuthorizedSettings | AskUiInferenceApiSettingsUnauthorized
-)
-
-
 class AskUiInferenceApi(GetModel, LocateModel, MessagesApi):
     def __init__(
         self,
         locator_serializer: AskUiLocatorSerializer,
         settings: AskUiInferenceApiSettings | None = None,
     ) -> None:
-        self._settings = settings or AskUiInferenceApiSettingsUnauthorized()
+        self._settings_default = settings
         self._locator_serializer = locator_serializer
 
-    @property
+    @cached_property
+    def _settings(self) -> AskUiInferenceApiSettings:
+        if self._settings_default is None:
+            return AskUiInferenceApiSettings()
+        return self._settings_default
+
+    @cached_property
     def _client(self) -> httpx.Client:
-        if not isinstance(self._settings, AskUiInferenceApiAuthorizedSettings):
-            self._settings = AskUiInferenceApiAuthorizedSettings.model_validate(
-                self._settings.model_dump()
-            )
         return httpx.Client(
             base_url=f"{self._settings.base_url}",
             headers={
diff --git a/tests/e2e/agent/conftest.py b/tests/e2e/agent/conftest.py
index 422c3fc6..fbda3329 100644
--- a/tests/e2e/agent/conftest.py
+++ b/tests/e2e/agent/conftest.py
@@ -12,7 +12,7 @@
 from askui.models.askui.ai_element_utils import AiElementCollection
 from askui.models.askui.inference_api import (
     AskUiInferenceApi,
-    AskUiInferenceApiAuthorizedSettings,
+    AskUiInferenceApiSettings,
 )
 from askui.models.askui.model_router import AskUiModelRouter
 from askui.models.models import ModelName
@@ -62,7 +62,7 @@ def askui_facade(
             ),
             reporter=reporter,
         ),
-        settings=AskUiInferenceApiAuthorizedSettings(
+        settings=AskUiInferenceApiSettings(
             messages=settings.messages,
         ),
     )