diff --git a/client/src/components/Chat/Menus/Endpoints/components/SpecIcon.tsx b/client/src/components/Chat/Menus/Endpoints/components/SpecIcon.tsx
index 6eef7656c3..2e354db08b 100644
--- a/client/src/components/Chat/Menus/Endpoints/components/SpecIcon.tsx
+++ b/client/src/components/Chat/Menus/Endpoints/components/SpecIcon.tsx
@@ -5,6 +5,7 @@ import type { IconMapProps } from '~/common';
 import { getModelSpecIconURL, getIconKey } from '~/utils';
 import { URLIcon } from '~/components/Endpoints/URLIcon';
 import { icons } from '~/hooks/Endpoint/Icons';
+import { isImageURL } from '~/utils/icons';
 
 interface SpecIconProps {
   currentSpec: TModelSpec;
@@ -18,11 +19,12 @@ const SpecIcon: React.FC<SpecIconProps> = ({ currentSpec, endpointsConfig }) =>
   const endpoint = currentSpec.preset?.endpoint;
   const endpointIconURL = getEndpointField(endpointsConfig, endpoint, 'iconURL');
   const iconKey = getIconKey({ endpoint, endpointsConfig, endpointIconURL });
+  const shouldRenderURLIcon = isImageURL(iconURL);
   let Icon: IconType;
 
-  if (!iconURL.includes('http')) {
+  if (!shouldRenderURLIcon) {
     Icon = (icons[iconURL] ?? icons[iconKey] ?? icons.unknown) as IconType;
-  } else if (iconURL) {
+  } else {
     return (
       <URLIcon
         iconURL={iconURL}
@@ -32,8 +34,6 @@ const SpecIcon: React.FC<SpecIconProps> = ({ currentSpec, endpointsConfig }) =>
         endpoint={endpoint || undefined}
       />
     );
-  } else {
-    Icon = (icons[endpoint ?? ''] ?? icons[iconKey] ?? icons.unknown) as IconType;
   }
 
   return (
diff --git a/client/src/components/Chat/Menus/Endpoints/components/__tests__/SpecIcon.test.tsx b/client/src/components/Chat/Menus/Endpoints/components/__tests__/SpecIcon.test.tsx
index 2549d8c5e3..e480a4bde7 100644
--- a/client/src/components/Chat/Menus/Endpoints/components/__tests__/SpecIcon.test.tsx
+++ b/client/src/components/Chat/Menus/Endpoints/components/__tests__/SpecIcon.test.tsx
@@ -55,6 +55,28 @@ describe('SpecIcon', () => {
     expect(screen.getByTestId('endpoint-icon')).toHaveAttribute('data-endpoint', '');
   });
 
+  it('renders same-origin absolute spec icon URLs as images', () => {
+    const currentSpec = {
+      name: 'clickhouse-test',
+      label: 'ClickHouse Test',
+      iconURL: '/assets/clickhouse-logo.svg',
+      preset: {
+        endpoint: EModelEndpoint.anthropic,
+      },
+    } as TModelSpec;
+
+    render(<SpecIcon currentSpec={currentSpec} endpointsConfig={endpointsConfig} />);
+
+    expect(screen.getByTestId('url-icon')).toHaveAttribute(
+      'data-icon-url',
+      '/assets/clickhouse-logo.svg',
+    );
+    expect(screen.getByTestId('url-icon')).toHaveAttribute(
+      'data-endpoint',
+      EModelEndpoint.anthropic,
+    );
+  });
+
   it('falls back to the unknown icon when runtime spec data has no icon or preset', () => {
     const currentSpec = {
       name: 'gemini-test',
diff --git a/client/src/components/Chat/Messages/MessageIcon.tsx b/client/src/components/Chat/Messages/MessageIcon.tsx
index 1c4401c338..0e4d1f4ffc 100644
--- a/client/src/components/Chat/Messages/MessageIcon.tsx
+++ b/client/src/components/Chat/Messages/MessageIcon.tsx
@@ -5,6 +5,7 @@ import type { TMessageIcon } from '~/common';
 import ConvoIconURL from '~/components/Endpoints/ConvoIconURL';
 import { useGetEndpointsQuery } from '~/data-provider';
 import { getIconEndpoint } from '~/utils';
+import { isImageURL } from '~/utils/icons';
 import Icon from '~/components/Endpoints/Icon';
 
 type MessageIconProps = {
@@ -64,7 +65,7 @@ const MessageIcon = memo(({ iconData, assistant, agent }: MessageIconProps) => {
     [endpointsConfig, endpoint],
   );
 
-  if (iconData?.isCreatedByUser !== true && iconURL != null && iconURL.includes('http')) {
+  if (iconData?.isCreatedByUser !== true && isImageURL(iconURL)) {
     return (
       <ConvoIconURL
         iconURL={iconURL}
diff --git a/client/src/components/Chat/Messages/__tests__/MessageIcon.render.test.tsx b/client/src/components/Chat/Messages/__tests__/MessageIcon.render.test.tsx
index c19142494a..d37ad9692a 100644
--- a/client/src/components/Chat/Messages/__tests__/MessageIcon.render.test.tsx
+++ b/client/src/components/Chat/Messages/__tests__/MessageIcon.render.test.tsx
@@ -1,5 +1,5 @@
 import React from 'react';
-import { render } from '@testing-library/react';
+import { render, screen } from '@testing-library/react';
 import { EModelEndpoint } from 'librechat-data-provider';
 import type { Agent } from 'librechat-data-provider';
 import type { TMessageIcon } from '~/common';
@@ -62,6 +62,22 @@ describe('MessageIcon render cycles', () => {
     expect(iconRenderCount.current).toBe(1);
   });
 
+  it('renders same-origin absolute model spec icon URLs directly', () => {
+    render(
+      <MessageIcon
+        iconData={{
+          ...baseIconData,
+          iconURL: '/assets/clickhouse-logo.svg',
+        }}
+      />,
+    );
+
+    expect(screen.getByTestId('convo-icon-url')).toHaveAttribute(
+      'data-icon-url',
+      '/assets/clickhouse-logo.svg',
+    );
+  });
+
   it('does not re-render when parent re-renders with same field values but new object references', () => {
     const agent = makeAgent();
     const { rerender } = render(<MessageIcon iconData={baseIconData} agent={agent} />);
diff --git a/client/src/components/Endpoints/ConvoIcon.tsx b/client/src/components/Endpoints/ConvoIcon.tsx
index 0ac36924a6..859f3b957b 100644
--- a/client/src/components/Endpoints/ConvoIcon.tsx
+++ b/client/src/components/Endpoints/ConvoIcon.tsx
@@ -4,6 +4,7 @@ import type * as t from 'librechat-data-provider';
 import { getIconKey, getEntity, getIconEndpoint } from '~/utils';
 import ConvoIconURL from '~/components/Endpoints/ConvoIconURL';
 import { icons } from '~/hooks/Endpoint/Icons';
+import { isImageURL } from '~/utils/icons';
 
 export default function ConvoIcon({
   conversation,
@@ -51,7 +52,7 @@ export default function ConvoIcon({
 
   return (
     <>
-      {iconURL && iconURL.includes('http') ? (
+      {isImageURL(iconURL) ? (
         <ConvoIconURL
           iconURL={iconURL}
           modelLabel={conversation?.chatGptLabel ?? conversation?.modelLabel ?? ''}
diff --git a/client/src/components/Endpoints/ConvoIconURL.tsx b/client/src/components/Endpoints/ConvoIconURL.tsx
index e3fd6bc636..ba28b5e115 100644
--- a/client/src/components/Endpoints/ConvoIconURL.tsx
+++ b/client/src/components/Endpoints/ConvoIconURL.tsx
@@ -1,7 +1,7 @@
 import { memo, useMemo } from 'react';
-import type { IconMapProps } from '~/common';
 import { URLIcon } from '~/components/Endpoints/URLIcon';
 import { icons } from '~/hooks/Endpoint/Icons';
+import { isImageURL } from '~/utils/icons';
 
 interface ConvoIconURLProps {
   iconURL?: string;
@@ -40,10 +40,7 @@ const ConvoIconURL: React.FC<ConvoIconURLProps> = ({
   context,
 }) => {
   const Icon = useMemo(() => icons[iconURL] ?? icons.unknown, [iconURL]);
-  const isURL = useMemo(
-    () => !!(iconURL && (iconURL.includes('http') || iconURL.startsWith('/images/'))),
-    [iconURL],
-  );
+  const isURL = useMemo(() => isImageURL(iconURL), [iconURL]);
   if (isURL) {
     return (
       <URLIcon
diff --git a/client/src/components/Endpoints/EndpointIcon.tsx b/client/src/components/Endpoints/EndpointIcon.tsx
index c32ea12369..0625533e02 100644
--- a/client/src/components/Endpoints/EndpointIcon.tsx
+++ b/client/src/components/Endpoints/EndpointIcon.tsx
@@ -8,6 +8,7 @@ import type {
 import ConvoIconURL from '~/components/Endpoints/ConvoIconURL';
 import MinimalIcon from '~/components/Endpoints/MinimalIcon';
 import { getIconEndpoint } from '~/utils';
+import { isImageURL } from '~/utils/icons';
 
 export default function EndpointIcon({
   conversation,
@@ -39,7 +40,7 @@ export default function EndpointIcon({
 
   const iconURL = assistantAvatar || convoIconURL;
 
-  if (iconURL && (iconURL.includes('http') || iconURL.startsWith('/images/'))) {
+  if (isImageURL(iconURL)) {
     return (
       <ConvoIconURL
         iconURL={iconURL}
diff --git a/client/src/components/Share/MessageIcon.tsx b/client/src/components/Share/MessageIcon.tsx
index b5c2585ab1..309d236796 100644
--- a/client/src/components/Share/MessageIcon.tsx
+++ b/client/src/components/Share/MessageIcon.tsx
@@ -5,6 +5,7 @@ import type { TMessageProps } from '~/common';
 import MessageEndpointIcon from '../Endpoints/MessageEndpointIcon';
 import ConvoIconURL from '~/components/Endpoints/ConvoIconURL';
 import { getIconEndpoint, logger } from '~/utils';
+import { isImageURL } from '~/utils/icons';
 
 export default function MessageIcon(
   props: Pick<TMessageProps, 'message' | 'conversation'> & {
@@ -49,7 +50,7 @@ export default function MessageIcon(
     agentName,
     agentAvatar,
   });
-  if (message?.isCreatedByUser !== true && iconURL && iconURL.includes('http')) {
+  if (message?.isCreatedByUser !== true && isImageURL(iconURL)) {
     return (
       <ConvoIconURL
         iconURL={iconURL}
diff --git a/client/src/utils/__tests__/icons.test.ts b/client/src/utils/__tests__/icons.test.ts
new file mode 100644
index 0000000000..490b968f68
--- /dev/null
+++ b/client/src/utils/__tests__/icons.test.ts
@@ -0,0 +1,17 @@
+import { isImageURL } from '../icons';
+
+describe('isImageURL', () => {
+  it.each(['https://example.com/icon.png', 'http://example.com/icon.png', '/assets/icon.svg'])(
+    'accepts image URL %s',
+    (iconURL) => {
+      expect(isImageURL(iconURL)).toBe(true);
+    },
+  );
+
+  it.each(['openAI', 'anthropic', 'assets/icon.svg', '//example.com/icon.png', '', null])(
+    'rejects non-image URL %s',
+    (iconURL) => {
+      expect(isImageURL(iconURL)).toBe(false);
+    },
+  );
+});
diff --git a/client/src/utils/icons.ts b/client/src/utils/icons.ts
new file mode 100644
index 0000000000..a518ba52f3
--- /dev/null
+++ b/client/src/utils/icons.ts
@@ -0,0 +1,7 @@
+export function isImageURL(iconURL?: string | null): iconURL is string {
+  if (!iconURL) {
+    return false;
+  }
+
+  return /^https?:\/\//i.test(iconURL) || (iconURL.startsWith('/') && !iconURL.startsWith('//'));
+}
diff --git a/client/src/utils/index.ts b/client/src/utils/index.ts
index befcef81a1..60d87a3a23 100644
--- a/client/src/utils/index.ts
+++ b/client/src/utils/index.ts
@@ -5,6 +5,7 @@ import logger from './logger';
 
 export * from './map';
 export * from './json';
+export * from './icons';
 export * from './email';
 export * from './share';
 export * from './files';