diff --git a/src/common/stores/llms/components/LLMSearchFilterInput.tsx b/src/common/stores/llms/components/LLMSearchFilterInput.tsx
new file mode 100644
index 000000000..c9864dc6c
--- /dev/null
+++ b/src/common/stores/llms/components/LLMSearchFilterInput.tsx
@@ -0,0 +1,51 @@
+import * as React from 'react';
+
+import type { SxProps } from '@mui/joy/styles/types';
+import { IconButton } from '@mui/joy';
+
+import { DebouncedInputMemo } from '~/common/components/DebouncedInput';
+import { StarredState } from '~/common/components/StarIcons';
+
+
+const _styles = {
+  filterBox: {
+    m: 1.5,
+    mb: 1,
+    backgroundColor: 'background.level1',
+    '&:focus-within': { backgroundColor: 'background.popup' },
+  },
+} as const satisfies Record<string, SxProps>;
+
+
+/**
+ * Model Selection Dropdowns: Shared search input with starred filter toggle
+ */
+export const LLMSearchFilterInput = React.memo(function LLMSearchFilterInput(props: {
+  size?: 'sm' | 'md' | 'lg',
+  llmsCount: number,
+  onSearch: (search: string | null) => void,
+  onStarredToggle?: () => void, // if provided, shows the starred filter button
+  showStarredOnly?: boolean,
+}) {
+  return (
+    <DebouncedInputMemo
+      size={props.size}
+      aggressiveRefocus
+      debounceTimeout={300}
+      onDebounce={props.onSearch}
+      placeholder={`Search ${props.llmsCount} models...`}
+      startDecorator={props.onStarredToggle ? (
+        <IconButton
+          size='sm'
+          variant='plain'
+          aria-label='Filter starred models'
+          onClick={props.onStarredToggle}
+        >
+          <StarredState isStarred={!!props.showStarredOnly} />
+          {/*<StarIconUnstyled isStarred={showStarredOnly} />*/}
+        </IconButton>
+      ) : undefined}
+      sx={_styles.filterBox}
+    />
+  );
+});
diff --git a/src/common/stores/llms/components/llms.dropdown.utils.ts b/src/common/stores/llms/components/llms.dropdown.utils.ts
new file mode 100644
index 000000000..eec24b738
--- /dev/null
+++ b/src/common/stores/llms/components/llms.dropdown.utils.ts
@@ -0,0 +1,62 @@
+import { findModelVendor } from '~/modules/llms/vendors/vendors.registry';
+
+import type { DLLM, DLLMId } from '../llms.types';
+import type { DModelsServiceId } from '../llms.service.types';
+import { findModelsServiceOrNull } from '../store-llms';
+import { isLLMVisible } from '../llms.types';
+
+
+/**
+ * Filter LLMs for dropdown display.
+ * Always includes the current model, respects starred/search/visibility filters.
+ */
+export function filterLLMsForDropdown(
+  llms: ReadonlyArray<DLLM>,
+  options: {
+    currentModelId?: DLLMId | null,
+    searchString?: string | null,
+    starredOnly?: boolean,
+  },
+): DLLM[] {
+  const lcSearch = options.searchString?.toLowerCase();
+  return llms.filter(llm => {
+    // Always include the currently selected model
+    if (options.currentModelId && llm.id === options.currentModelId) return true;
+
+    // Filter by starred status
+    if (options.starredOnly && !llm.userStarred) return false;
+
+    // Filter by search string
+    if (lcSearch && !llm.label.toLowerCase().includes(lcSearch)) return false;
+
+    // Show visible models, or all if actively searching
+    return lcSearch ? true : isLLMVisible(llm);
+  });
+}
+
+
+export interface LLMServiceGroup {
+  serviceId: DModelsServiceId;
+  serviceLabel: string;
+  models: DLLM[];
+}
+
+/**
+ * Group LLMs by service, resolving service display labels.
+ */
+export function groupLLMsByService(llms: ReadonlyArray<DLLM>): LLMServiceGroup[] {
+  const groups: LLMServiceGroup[] = [];
+  let currentGroup: LLMServiceGroup | null = null;
+
+  for (const llm of llms) {
+    if (!currentGroup || currentGroup.serviceId !== llm.sId) {
+      const vendor = findModelVendor(llm.vId);
+      const serviceLabel = findModelsServiceOrNull(llm.sId)?.label || vendor?.name || llm.sId;
+      currentGroup = { serviceId: llm.sId, serviceLabel, models: [] };
+      groups.push(currentGroup);
+    }
+    currentGroup.models.push(llm);
+  }
+
+  return groups;
+}