diff --git a/apps/web/src/app/api/fim/completions/route.ts b/apps/web/src/app/api/fim/completions/route.ts
index c0f0ccef14c..156fe908b0b 100644
--- a/apps/web/src/app/api/fim/completions/route.ts
+++ b/apps/web/src/app/api/fim/completions/route.ts
@@ -5,7 +5,7 @@ import z from 'zod';
 import { captureException, setTag, startInactiveSpan } from '@sentry/nextjs';
 import type { MicrodollarUsageContext } from '@/lib/ai-gateway/processUsage.types';
 import { validateFeatureHeader, FEATURE_HEADER } from '@/lib/feature-detection';
-import { isFreeModel } from '@/lib/ai-gateway/models';
+import { isFreeModel } from '@/lib/ai-gateway/is-free-model';
 import { sentryRootSpan } from '@/lib/getRootSpan';
 import { getUserFromAuth } from '@/lib/user.server';
 import {
diff --git a/apps/web/src/app/api/openrouter/[...path]/route.ts b/apps/web/src/app/api/openrouter/[...path]/route.ts
index 0bf31dfa2b1..80bd2075987 100644
--- a/apps/web/src/app/api/openrouter/[...path]/route.ts
+++ b/apps/web/src/app/api/openrouter/[...path]/route.ts
@@ -24,12 +24,12 @@ import { setTag, startInactiveSpan } from '@sentry/nextjs';
 import { getUserFromAuth } from '@/lib/user.server';
 import { sentryRootSpan } from '@/lib/getRootSpan';
 import {
-  isFreeModel,
   isDeadFreeModel,
   isExcludedForFeature,
   isKiloExclusiveFreeModel,
   isKiloStealthModel,
 } from '@/lib/ai-gateway/models';
+import { isFreeModel } from '@/lib/ai-gateway/is-free-model';
 import {
   accountForMicrodollarUsage,
   captureProxyError,
diff --git a/apps/web/src/app/api/openrouter/embeddings/route.ts b/apps/web/src/app/api/openrouter/embeddings/route.ts
index 799bdca4a57..04675f441e2 100644
--- a/apps/web/src/app/api/openrouter/embeddings/route.ts
+++ b/apps/web/src/app/api/openrouter/embeddings/route.ts
@@ -8,7 +8,7 @@ import { debugSaveProxyRequest } from '@/lib/debugUtils';
 import { captureException, setTag, startInactiveSpan } from '@sentry/nextjs';
 import { getUserFromAuth } from '@/lib/user.server';
 import { sentryRootSpan } from '@/lib/getRootSpan';
-import { isFreeModel } from '@/lib/ai-gateway/models';
+import { isFreeModel } from '@/lib/ai-gateway/is-free-model';
 import {
   captureProxyError,
   checkOrganizationModelRestrictions,
diff --git a/apps/web/src/lib/ai-gateway/is-free-model.ts b/apps/web/src/lib/ai-gateway/is-free-model.ts
new file mode 100644
index 00000000000..c19ede168aa
--- /dev/null
+++ b/apps/web/src/lib/ai-gateway/is-free-model.ts
@@ -0,0 +1,23 @@
+import { KILO_AUTO_FREE_MODEL } from '@/lib/ai-gateway/auto-model';
+import { isKiloExclusiveFreeModel, isOpenRouterStealthModel } from '@/lib/ai-gateway/models';
+
+/**
+ * Returns true if `model` should be treated as free for the requesting user
+ * this request.
+ *
+ * Server-only: future implementations will consult external state (e.g. a
+ * Redis-backed membership set for partner-funded preview model ids) to
+ * answer for models that are conditionally free. Lives outside `models.ts`
+ * so client bundles importing the model-id constants
+ * (`PRIMARY_DEFAULT_MODEL`, `preferredModels`, …) from `models.ts` don't
+ * transitively pull in those server-only dependencies.
+ */
+export async function isFreeModel(model: string): Promise<boolean> {
+  return (
+    isKiloExclusiveFreeModel(model) ||
+    model === KILO_AUTO_FREE_MODEL.id ||
+    (model ?? '').endsWith(':free') ||
+    model === 'openrouter/free' ||
+    isOpenRouterStealthModel(model ?? '')
+  );
+}
diff --git a/apps/web/src/lib/ai-gateway/models.test.ts b/apps/web/src/lib/ai-gateway/models.test.ts
index 8ddc2928af3..c0df8f0ed53 100644
--- a/apps/web/src/lib/ai-gateway/models.test.ts
+++ b/apps/web/src/lib/ai-gateway/models.test.ts
@@ -1,5 +1,6 @@
 import { describe, test, expect } from '@jest/globals';
-import { autoFreeModels, isFreeModel, kiloExclusiveModels } from './models';
+import { autoFreeModels, kiloExclusiveModels } from './models';
+import { isFreeModel } from './is-free-model';
 import { getInferenceProvider } from './providers/kilo-exclusive-model';
 
 describe('isFreeModel', () => {
diff --git a/apps/web/src/lib/ai-gateway/models.ts b/apps/web/src/lib/ai-gateway/models.ts
index 2b2b9d09f1d..fed0d76ecd1 100644
--- a/apps/web/src/lib/ai-gateway/models.ts
+++ b/apps/web/src/lib/ai-gateway/models.ts
@@ -58,16 +58,6 @@ export const preferredModels = [
   GLM_CURRENT_MODEL_ID,
 ];
 
-export async function isFreeModel(model: string): Promise<boolean> {
-  return (
-    isKiloExclusiveFreeModel(model) ||
-    model === KILO_AUTO_FREE_MODEL.id ||
-    (model ?? '').endsWith(':free') ||
-    model === 'openrouter/free' ||
-    isOpenRouterStealthModel(model ?? '')
-  );
-}
-
 export function isPdfSupportingModel(model: string): boolean {
   return isClaudeModel(model) || isOpenAiModel(model) || isGrok4Model(model);
 }
@@ -97,7 +87,7 @@ export function isKiloStealthModel(model: string): boolean {
   return kiloExclusiveModels.some(m => m.public_id === model && m.flags.includes('stealth'));
 }
 
-function isOpenRouterStealthModel(model: string): boolean {
+export function isOpenRouterStealthModel(model: string): boolean {
   return model.startsWith('openrouter/') && (model.endsWith('-alpha') || model.endsWith('-beta'));
 }
 
diff --git a/apps/web/src/lib/ai-gateway/processUsage.ts b/apps/web/src/lib/ai-gateway/processUsage.ts
index ea96a9ff4bb..54a46a2c214 100644
--- a/apps/web/src/lib/ai-gateway/processUsage.ts
+++ b/apps/web/src/lib/ai-gateway/processUsage.ts
@@ -21,7 +21,8 @@ import { eq, sql } from 'drizzle-orm';
 import { sentryRootSpan } from '../getRootSpan';
 import { ingestOrganizationTokenUsage } from '@/lib/organizations/organization-usage';
 import type { ProviderId } from '@/lib/ai-gateway/providers/types';
-import { findKiloExclusiveModel, isFreeModel, isKiloStealthModel } from '@/lib/ai-gateway/models';
+import { findKiloExclusiveModel, isKiloStealthModel } from '@/lib/ai-gateway/models';
+import { isFreeModel } from '@/lib/ai-gateway/is-free-model';
 import { sentryLogger } from '@/lib/utils.server';
 import { maybeIssueKiloPassBonusFromUsageThreshold } from '@/lib/kilo-pass/usage-triggered-bonus';
 import { getEffectiveKiloPassThreshold } from '@/lib/kilo-pass/threshold';
diff --git a/apps/web/src/lib/ai-gateway/providers/openrouter/index.ts b/apps/web/src/lib/ai-gateway/providers/openrouter/index.ts
index 629994f1b60..3c7e39b7728 100644
--- a/apps/web/src/lib/ai-gateway/providers/openrouter/index.ts
+++ b/apps/web/src/lib/ai-gateway/providers/openrouter/index.ts
@@ -1,9 +1,9 @@
 import {
-  isFreeModel,
   isPdfSupportingModel,
   kiloExclusiveModels,
   preferredModels,
 } from '@/lib/ai-gateway/models';
+import { isFreeModel } from '@/lib/ai-gateway/is-free-model';
 import PROVIDERS from '@/lib/ai-gateway/providers/provider-definitions';
 import type { OpenRouterModel } from '@/lib/organizations/organization-types';
 import {
diff --git a/apps/web/src/lib/bot/agent-runner.ts b/apps/web/src/lib/bot/agent-runner.ts
index 58cc3ecbf42..14a3d348e54 100644
--- a/apps/web/src/lib/bot/agent-runner.ts
+++ b/apps/web/src/lib/bot/agent-runner.ts
@@ -29,7 +29,7 @@ import {
   formatGitLabRepositoriesForPrompt,
   getGitLabRepositoryContext,
 } from '@/lib/slack-bot/gitlab-repository-context';
-import { isFreeModel } from '@/lib/ai-gateway/models';
+import { isFreeModel } from '@/lib/ai-gateway/is-free-model';
 import { generateApiToken } from '@/lib/tokens';
 import { captureException } from '@sentry/nextjs';
 import { createOpenAICompatible } from '@ai-sdk/openai-compatible';