diff --git a/.env.example b/.env.example
index eba956c..40c7031 100644
--- a/.env.example
+++ b/.env.example
@@ -1,5 +1,5 @@
-OPENROUTER_API_KEY=
-OPENROUTER_MODEL=
+AI_GATEWAY_API_KEY=
+AI_GATEWAY_MODEL=
 
 UPSTASH_REDIS_REST_URL=
 UPSTASH_REDIS_REST_TOKEN=
diff --git a/app/api/demo/chat/route.ts b/app/api/demo/chat/route.ts
index 723f27d..47fee47 100644
--- a/app/api/demo/chat/route.ts
+++ b/app/api/demo/chat/route.ts
@@ -1,5 +1,6 @@
 import {
   convertToModelMessages,
+  gateway,
   jsonSchema,
   stepCountIs,
   streamText,
@@ -16,7 +17,6 @@ import {
   chatRateLimit,
   getClientIp,
 } from "@/lib/demo/rate-limit";
-import { openrouter } from "@/lib/ai/openrouter";
 
 const SYSTEM_PROMPT = `You are an AI assistant demonstrating the Agent Auth Protocol — a standard for authorizing AI agents to act on behalf of users.
 
@@ -375,9 +375,7 @@ export async function POST(req: Request) {
   }
 
   const result = streamText({
-    model: openrouter.chat(
-      process.env.OPENROUTER_MODEL ?? "anthropic/claude-opus-4.6",
-    ),
+    model: gateway(process.env.AI_GATEWAY_MODEL ?? "anthropic/claude-opus-4.6"),
     system: systemPrompt,
     messages: await convertToModelMessages(messages),
     tools: buildTools(session),
diff --git a/lib/ai/openrouter.ts b/lib/ai/openrouter.ts
deleted file mode 100644
index 6f071f2..0000000
--- a/lib/ai/openrouter.ts
+++ /dev/null
@@ -1,40 +0,0 @@
-import { createOpenRouter } from "@openrouter/ai-sdk-provider";
-
-function requireOpenRouterApiKey(): string {
-	const apiKey = process.env.OPENROUTER_API_KEY?.trim();
-
-	if (!apiKey) {
-		throw new Error(
-			"Missing OPENROUTER_API_KEY. Add it to your environment before starting the server.",
-		);
-	}
-
-	if (!apiKey.startsWith("sk-or-v1-")) {
-		throw new Error(
-			"Invalid OPENROUTER_API_KEY format. OpenRouter keys must start with 'sk-or-v1-'.",
-		);
-	}
-
-	return apiKey;
-}
-
-function getOpenRouterHeaders(): Record<string, string> {
-	const headers: Record<string, string> = {
-		"X-Title": "Agent Auth Protocol",
-	};
-
-	const referer =
-		process.env.OPENROUTER_SITE_URL?.trim() ??
-		process.env.NEXT_PUBLIC_SITE_URL?.trim();
-
-	if (referer) {
-		headers["HTTP-Referer"] = referer;
-	}
-
-	return headers;
-}
-
-export const openrouter = createOpenRouter({
-	apiKey: requireOpenRouterApiKey(),
-	headers: getOpenRouterHeaders(),
-});
diff --git a/lib/ai/server.ts b/lib/ai/server.ts
index 096f351..2b1e99e 100644
--- a/lib/ai/server.ts
+++ b/lib/ai/server.ts
@@ -1,5 +1,6 @@
 import {
 	convertToModelMessages,
+	gateway,
 	stepCountIs,
 	streamText,
 	wrapLanguageModel,
@@ -15,7 +16,6 @@ import {
 	getSpecContent,
 	getSpecVersions,
 } from "@/lib/spec";
-import { openrouter } from "@/lib/ai/openrouter";
 
 // Build unified Orama search index: docs + spec sections
 const searchServer = initAdvancedSearch({
@@ -157,9 +157,7 @@ export async function POST(req: Request) {
 	}
 
 	const model = wrapLanguageModel({
-		model: openrouter.chat(
-			process.env.OPENROUTER_MODEL ?? "moonshotai/kimi-k2.5",
-		),
+		model: gateway(process.env.AI_GATEWAY_MODEL ?? "moonshotai/kimi-k2.5"),
 		middleware: middlewares,
 	});
 
diff --git a/package.json b/package.json
index faca1cd..c7dcf35 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,6 @@
   "dependencies": {
     "@ai-sdk/react": "^3.0.118",
     "@auth/agent": "latest",
-    "@openrouter/ai-sdk-provider": "^2.3.3",
     "@radix-ui/react-avatar": "^1.1.10",
     "@radix-ui/react-dialog": "^1.1.14",
     "@radix-ui/react-dropdown-menu": "^2.1.15",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 69cde4b..07708ad 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -14,9 +14,6 @@ importers:
       '@auth/agent':
         specifier: latest
         version: 0.4.6(ai@6.0.116(zod@4.3.6))
-      '@openrouter/ai-sdk-provider':
-        specifier: ^2.3.3
-        version: 2.3.3(ai@6.0.116(zod@4.3.6))(zod@4.3.6)
       '@radix-ui/react-avatar':
         specifier: ^1.1.10
         version: 1.1.11(@types/react-dom@19.2.3(@types/react@19.2.14))(@types/react@19.2.14)(react-dom@19.2.4(react@19.2.4))(react@19.2.4)
@@ -631,13 +628,6 @@ packages:
     cpu: [x64]
     os: [win32]
 
-  '@openrouter/ai-sdk-provider@2.3.3':
-    resolution: {integrity: sha512-4fVteGkVedc7fGoA9+qJs4tpYwALezMq14m2Sjub3KmyRlksCbK+WJf67NPdGem8+NZrV2tAN42A1NU3+SiV3w==}
-    engines: {node: '>=18'}
-    peerDependencies:
-      ai: ^6.0.0
-      zod: ^3.25.0 || ^4.0.0
-
   '@opentelemetry/api@1.9.0':
     resolution: {integrity: sha512-3giAOQvZiH5F9bMlMiv8+GSPMeqg0dbaeo58/0SlA9sxSqZhnUtxzX9/2FzyhS9sWQf5S0GJE0AKBrFqjpeYcg==}
     engines: {node: '>=8.0.0'}
@@ -3446,11 +3436,6 @@ snapshots:
   '@next/swc-win32-x64-msvc@16.1.6':
     optional: true
 
-  '@openrouter/ai-sdk-provider@2.3.3(ai@6.0.116(zod@4.3.6))(zod@4.3.6)':
-    dependencies:
-      ai: 6.0.116(zod@4.3.6)
-      zod: 4.3.6
-
   '@opentelemetry/api@1.9.0': {}
 
   '@orama/orama@3.1.18': {}