diff --git a/tests/e2e/ui/helpers/playground.ts b/tests/e2e/ui/helpers/playground.ts
index 39aae8398a5..866334e1c94 100644
--- a/tests/e2e/ui/helpers/playground.ts
+++ b/tests/e2e/ui/helpers/playground.ts
@@ -10,16 +10,15 @@ import { Page } from "../fixtures/pages";
  */
 export const onlyVisible = (locator: Locator): Locator => locator.filter({ visible: true }).first();
 
-/** The model dropdown, addressed by the placeholder it shows before selection. */
-export const modelSelect = (page: PlaywrightPage): Locator =>
-  onlyVisible(page.locator('.ant-select:has(.ant-select-selection-placeholder:text-is("Select a Model"))'));
+/** The model combobox, addressed by the placeholder its search input shows before selection. */
+export const modelSelect = (page: PlaywrightPage): Locator => onlyVisible(page.getByPlaceholder("Select a Model"));
 
-/** Send button is icon-only (an up-arrow), so there is no accessible name. */
-export const sendButton = (page: PlaywrightPage): Locator => onlyVisible(page.locator("button:has(.anticon-arrow-up)"));
+export const sendButton = (page: PlaywrightPage): Locator =>
+  onlyVisible(page.getByRole("button", { name: "Send message" }));
 
-/** The Virtual Key Source dropdown, addressed by its currently selected label. */
-export const keySourceSelect = (page: PlaywrightPage, current: string): Locator =>
-  onlyVisible(page.locator(`.ant-select:has(.ant-select-selection-item[title="${current}"])`));
+/** The Virtual Key Source dropdown, addressed by the accessible name on its trigger. */
+export const keySourceSelect = (page: PlaywrightPage): Locator =>
+  onlyVisible(page.getByLabel("Virtual Key Source"));
 
 export async function openPlayground(page: PlaywrightPage): Promise<void> {
   await navigateToPage(page, Page.LlmPlayground);
@@ -33,9 +32,8 @@ export async function selectModel(page: PlaywrightPage, model: string): Promise<
   const select = modelSelect(page);
   await select.click();
   // Virtualized: options outside the rendered window are absent from the DOM, so search first.
-  await select.locator("input.ant-select-selection-search-input").fill(model);
-  // antd portals its dropdown to the body; options carry the value as `title`.
-  await onlyVisible(page.locator(`.ant-select-item-option[title="${model}"]`)).click({ timeout: 15_000 });
+  await select.fill(model);
+  await onlyVisible(page.getByRole("option", { name: model, exact: true })).click({ timeout: 15_000 });
 }
 
 export async function sendMessage(page: PlaywrightPage, message: string): Promise<void> {
diff --git a/tests/e2e/ui/tests/logs/logs.spec.ts b/tests/e2e/ui/tests/logs/logs.spec.ts
index fc5cce53511..c1182a7ca5c 100644
--- a/tests/e2e/ui/tests/logs/logs.spec.ts
+++ b/tests/e2e/ui/tests/logs/logs.spec.ts
@@ -59,7 +59,7 @@ test.describe("Logs page", () => {
 
     // Expand: clicking the row opens the detail drawer for that request.
     await row.click();
-    const drawer = page.locator(".ant-drawer-content").first();
+    const drawer = page.getByRole("dialog").first();
     await expect(drawer).toBeVisible({ timeout: 20_000 });
     await expect(drawer.getByText("Request & Response")).toBeVisible({
       timeout: 20_000,
@@ -91,7 +91,7 @@ test.describe("Logs page", () => {
 
     const row = await openLogsForRequest(page, requestId);
     await row.click();
-    const drawer = page.locator(".ant-drawer-content").first();
+    const drawer = page.getByRole("dialog").first();
     await expect(drawer).toBeVisible({ timeout: 20_000 });
 
     // Copy request: the Input card's copy button puts the prompt on the clipboard.
@@ -120,7 +120,7 @@ test.describe("Logs page", () => {
     const row = await openLogsForRequest(page, requestId);
     await row.click();
 
-    const drawer = page.locator(".ant-drawer-content").first();
+    const drawer = page.getByRole("dialog").first();
     await expect(drawer.getByText("Request & Response")).toBeVisible({
       timeout: 20_000,
     });
@@ -159,14 +159,12 @@ test.describe("Logs page", () => {
     const row = await openLogsForRequest(page, requestId);
     await row.click();
 
-    const drawer = page.locator(".ant-drawer-content").first();
+    const drawer = page.getByRole("dialog").first();
     await expect(drawer.getByText("Request & Response")).toBeVisible({
       timeout: 20_000,
     });
 
-    // antd Radio.Button hides the <input> under its <label>, which intercepts
-    // the pointer event — click the label, not the radio.
-    await drawer.locator("label.ant-radio-button-wrapper").filter({ hasText: "JSON" }).click();
+    await drawer.getByRole("tab", { name: "JSON" }).click();
 
     const requestTab = drawer.getByRole("tab", { name: "Request" });
     await expect(requestTab).toBeVisible({ timeout: 10_000 });
diff --git a/tests/e2e/ui/tests/modelHub/modelHub.spec.ts b/tests/e2e/ui/tests/modelHub/modelHub.spec.ts
index ca9c35ce722..16ec94c1dc8 100644
--- a/tests/e2e/ui/tests/modelHub/modelHub.spec.ts
+++ b/tests/e2e/ui/tests/modelHub/modelHub.spec.ts
@@ -12,7 +12,7 @@ test.describe("AI Hub (internal admin view)", () => {
     // Open the "Select Models to Make Public" modal
     await page.getByRole("button", { name: /Select Models to Make Public/i }).click();
 
-    const modal = page.locator(".ant-modal:visible").filter({ hasText: "Make Models Public" });
+    const modal = page.getByRole("dialog", { name: "Make Models Public" });
     await expect(modal).toBeVisible({ timeout: 5_000 });
 
     // Guard: the "Select All (N)" label only shows a count when filteredData
diff --git a/tests/e2e/ui/tests/playground/playground.spec.ts b/tests/e2e/ui/tests/playground/playground.spec.ts
index 53fd93ffa5f..9a9ecd539b3 100644
--- a/tests/e2e/ui/tests/playground/playground.spec.ts
+++ b/tests/e2e/ui/tests/playground/playground.spec.ts
@@ -15,7 +15,7 @@ test.describe("Playground", () => {
       await openPlayground(page);
 
       // "Current UI Session" is the default: the logged-in admin's key, nothing pasted.
-      await expect(onlyVisible(page.getByTitle("Current UI Session"))).toBeVisible();
+      await expect(keySourceSelect(page)).toContainText("Current UI Session");
 
       await selectModel(page, model);
       const prompt = `playground ping for ${model}`;
@@ -35,8 +35,8 @@ test.describe("Playground", () => {
     await openPlayground(page);
 
     // Switch the source to "Virtual Key" and paste the key we just minted.
-    await keySourceSelect(page, "Current UI Session").click();
-    await onlyVisible(page.locator('.ant-select-item-option[title="Virtual Key"]')).click({ timeout: 15_000 });
+    await keySourceSelect(page).click();
+    await onlyVisible(page.getByRole("option", { name: "Virtual Key" })).click({ timeout: 15_000 });
 
     const keyInput = onlyVisible(page.getByPlaceholder("Enter custom Virtual Key"));
     await expect(keyInput).toBeVisible({ timeout: 10_000 });
diff --git a/tests/llm_responses_api_testing/test_google_ai_studio_responses_api.py b/tests/llm_responses_api_testing/test_google_ai_studio_responses_api.py
index 70c818f0a0a..3ed92bd760d 100644
--- a/tests/llm_responses_api_testing/test_google_ai_studio_responses_api.py
+++ b/tests/llm_responses_api_testing/test_google_ai_studio_responses_api.py
@@ -81,9 +81,8 @@ async def test_mock_basic_google_ai_studio_responses_api_with_tools():
             call_kwargs["messages"][0]["content"]
             == "what is the latest version of supabase python package and when was it released?"
         )
-        assert (
-            call_kwargs["tools"] == []
-        )  # web search tools are converted to web_search_options, not kept as tools
+        assert "tools" not in call_kwargs
+        assert "tool_choice" not in call_kwargs
 
 
 @pytest.mark.asyncio
diff --git a/tests/store_model_in_db_tests/test_adding_passthrough_model.py b/tests/store_model_in_db_tests/test_adding_passthrough_model.py
index c8212b849a1..001b0c941a5 100644
--- a/tests/store_model_in_db_tests/test_adding_passthrough_model.py
+++ b/tests/store_model_in_db_tests/test_adding_passthrough_model.py
@@ -6,8 +6,7 @@ make request
 Cases to cover
 1. user points api base to <proxy-base>/assemblyai
 2. user points api base to <proxy-base>/asssemblyai/us
-3. user points api base to <proxy-base>/assemblyai/eu
-4. Bad API Key / credential - 401
+3. Bad API Key / credential - 401
 """
 
 import time
@@ -19,7 +18,6 @@ import json
 TEST_MASTER_KEY = "sk-1234"
 PROXY_BASE_URL = "http://0.0.0.0:4000"
 US_BASE_URL = f"{PROXY_BASE_URL}/assemblyai"
-EU_BASE_URL = f"{PROXY_BASE_URL}/eu.assemblyai"
 ASSEMBLYAI_API_KEY_ENV_VAR = "ASSEMBLYAI_API_KEY"
 
 
@@ -82,20 +80,6 @@ def test_e2e_assemblyai_passthrough():
     pass
 
 
-def test_e2e_assemblyai_passthrough_eu():
-    """
-    Test adding a pass through assemblyai model + api key + api base to the db
-    wait 20 seconds
-    make request
-    """
-    add_assembly_ai_model_to_db(api_base="https://api.eu.assemblyai.com")
-    virtual_key = create_virtual_key()
-    # make request
-    make_assemblyai_basic_transcribe_request(
-        virtual_key=virtual_key, assemblyai_base_url=EU_BASE_URL
-    )
-
-    pass
 
 
 def test_assemblyai_routes_with_bad_api_key():
diff --git a/tests/test_openai_endpoints.py b/tests/test_openai_endpoints.py
index 8d01651c586..0d44064997e 100644
--- a/tests/test_openai_endpoints.py
+++ b/tests/test_openai_endpoints.py
@@ -445,7 +445,7 @@ async def test_chat_completion_anthropic_structured_output():
     client = AsyncOpenAI(api_key="sk-1234", base_url="http://0.0.0.0:4000")
 
     res = await client.beta.chat.completions.parse(
-        model="bedrock/us.anthropic.claude-3-sonnet-20240229-v1:0",
+        model="bedrock/us.anthropic.claude-sonnet-4-5-20250929-v1:0",
         messages=messages,
         response_format=EventsList,
         timeout=60,