diff --git a/.github/workflows/model-consistency.yml b/.github/workflows/model-consistency.yml
new file mode 100644
index 000000000..bef34f2b1
--- /dev/null
+++ b/.github/workflows/model-consistency.yml
@@ -0,0 +1,44 @@
+name: Model Consistency
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - "config/model-policy.json"
+      - "scripts/models/**"
+      - "docs/content/docs/openui-lang/examples/**"
+      - "examples/**"
+      - "packages/langchain/README.md"
+      - "packages/openui-cli/src/templates/openui-self-hosted/**"
+      - "package.json"
+      - ".github/workflows/model-consistency.yml"
+  pull_request:
+    branches: [main]
+    paths:
+      - "config/model-policy.json"
+      - "scripts/models/**"
+      - "docs/content/docs/openui-lang/examples/**"
+      - "examples/**"
+      - "packages/langchain/README.md"
+      - "packages/openui-cli/src/templates/openui-self-hosted/**"
+      - "package.json"
+      - ".github/workflows/model-consistency.yml"
+
+permissions:
+  contents: read
+
+jobs:
+  model-consistency:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+
+      - uses: actions/setup-node@v6
+        with:
+          node-version: 20
+
+      - name: Test model policy tooling
+        run: node --test scripts/models/model-policy.test.mjs
+
+      - name: Check managed model references
+        run: node scripts/models/sync.mjs --check
diff --git a/config/model-policy.json b/config/model-policy.json
new file mode 100644
index 000000000..9f81986fe
--- /dev/null
+++ b/config/model-policy.json
@@ -0,0 +1,30 @@
+{
+  "roles": {
+    "selfHostedOpenAI": {
+      "description": "Default OpenAI model used by self-hosted examples and integration guides.",
+      "variants": {
+        "bare": "gpt-5.5",
+        "gateway": "openai/gpt-5.5",
+        "langchain": "openai:gpt-5.5",
+        "label": "GPT-5.5"
+      }
+    }
+  },
+  "managedScopes": [
+    {
+      "role": "selfHostedOpenAI",
+      "paths": [
+        "examples",
+        "packages/openui-cli/src/templates/openui-self-hosted",
+        "packages/langchain/README.md",
+        "docs/content/docs/openui-lang/examples"
+      ],
+      "exclude": [
+        {
+          "path": "examples/openui-cloud",
+          "reason": "OpenUI Cloud has its own provider catalog and Cloud-specific defaults."
+        }
+      ]
+    }
+  ]
+}
diff --git a/docs/content/docs/openui-lang/examples/vercel-ai-chat.mdx b/docs/content/docs/openui-lang/examples/vercel-ai-chat.mdx
index 8f9b8ac35..5907d8b93 100644
--- a/docs/content/docs/openui-lang/examples/vercel-ai-chat.mdx
+++ b/docs/content/docs/openui-lang/examples/vercel-ai-chat.mdx
@@ -34,7 +34,7 @@ export async function POST(req: Request) {
   const modelMessages = await convertToModelMessages(messages);
 
   const result = streamText({
-    model: openai("gpt-5.4"),
+    model: openai("gpt-5.5"),
     system: systemPrompt,
     messages: modelMessages,
     tools,
diff --git a/package.json b/package.json
index 7767536fc..edfa24a8f 100644
--- a/package.json
+++ b/package.json
@@ -4,6 +4,8 @@
   "description": "A full-stack, renderer-agnostic Generative UI framework with a streaming-first language, official React support, and community integrations for other frameworks",
   "main": "index.js",
   "scripts": {
+    "models:check": "node scripts/models/sync.mjs --check",
+    "models:sync": "node scripts/models/sync.mjs",
     "test": "pnpm -r run test"
   },
   "engines": {
diff --git a/packages/openui-cli/src/templates/openui-self-hosted/README.md b/packages/openui-cli/src/templates/openui-self-hosted/README.md
index 5daef3995..c6208044b 100644
--- a/packages/openui-cli/src/templates/openui-self-hosted/README.md
+++ b/packages/openui-cli/src/templates/openui-self-hosted/README.md
@@ -7,7 +7,7 @@ Create `.env.local` with your OpenAI credentials:
 ```bash
 OPENAI_API_KEY=...
 # Optional:
-OPENAI_MODEL=gpt-5.2
+OPENAI_MODEL=gpt-5.5
 ```
 
 ## Getting Started
diff --git a/packages/openui-cli/src/templates/openui-self-hosted/src/app/api/chat/route.ts b/packages/openui-cli/src/templates/openui-self-hosted/src/app/api/chat/route.ts
index f33e8690c..37d342d60 100644
--- a/packages/openui-cli/src/templates/openui-self-hosted/src/app/api/chat/route.ts
+++ b/packages/openui-cli/src/templates/openui-self-hosted/src/app/api/chat/route.ts
@@ -17,7 +17,7 @@ export async function POST(req: Request) {
     return await client.chat.completions
       .create(
         {
-          model: process.env.OPENAI_MODEL ?? "gpt-5.2",
+          model: process.env.OPENAI_MODEL ?? "gpt-5.5",
           messages: [
             {
               role: "system",
diff --git a/scripts/models/model-policy.mjs b/scripts/models/model-policy.mjs
new file mode 100644
index 000000000..829668659
--- /dev/null
+++ b/scripts/models/model-policy.mjs
@@ -0,0 +1,106 @@
+import { execFileSync } from "node:child_process";
+import { readFileSync, writeFileSync } from "node:fs";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+
+const MODEL_SUFFIX = String.raw`\d(?:[a-z0-9._-]*[a-z0-9])?`;
+
+const VARIANT_PATTERNS = {
+  gateway: new RegExp(String.raw`\bopenai\/gpt-${MODEL_SUFFIX}\b`, "g"),
+  langchain: new RegExp(String.raw`\bopenai:gpt-${MODEL_SUFFIX}\b`, "g"),
+  bare: new RegExp(String.raw`(?<!openai[/:])\bgpt-${MODEL_SUFFIX}\b`, "g"),
+  label:
+    /\bGPT-\d(?:\.\d+)*(?:[A-Za-z][A-Za-z0-9.-]*| (?:Mini|mini|Nano|nano|Pro|Sol|Codex|Turbo|Preview|Latest))?\b/g,
+};
+
+export const REPO_ROOT = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "../..");
+
+function matchesPath(filePath, candidate) {
+  return filePath === candidate || filePath.startsWith(`${candidate}/`);
+}
+
+export function isPathManaged(filePath, scope) {
+  const included = scope.paths.some((candidate) => matchesPath(filePath, candidate));
+  const excluded = scope.exclude?.some(({ path: candidate }) => matchesPath(filePath, candidate));
+
+  return included && !excluded;
+}
+
+export function synchronizeText(text, role) {
+  let synchronized = text;
+  let references = 0;
+
+  // Qualified forms must be handled before the bare model pattern.
+  for (const variant of ["gateway", "langchain", "bare", "label"]) {
+    const pattern = VARIANT_PATTERNS[variant];
+    const value = role.variants[variant];
+
+    synchronized = synchronized.replace(pattern, () => {
+      references += 1;
+      return value;
+    });
+  }
+
+  return { text: synchronized, references };
+}
+
+function readPolicy(repoRoot) {
+  const policyPath = path.join(repoRoot, "config/model-policy.json");
+  const policy = JSON.parse(readFileSync(policyPath, "utf8"));
+
+  for (const scope of policy.managedScopes ?? []) {
+    const role = policy.roles?.[scope.role];
+    if (!role) {
+      throw new Error(`Unknown model policy role: ${scope.role}`);
+    }
+
+    for (const variant of Object.keys(VARIANT_PATTERNS)) {
+      if (!role.variants?.[variant]) {
+        throw new Error(`Role ${scope.role} is missing the ${variant} variant`);
+      }
+    }
+
+    for (const exclusion of scope.exclude ?? []) {
+      if (!exclusion.path || !exclusion.reason) {
+        throw new Error(`Every exclusion for ${scope.role} needs a path and reason`);
+      }
+    }
+  }
+
+  return policy;
+}
+
+function repositoryFiles(repoRoot) {
+  return execFileSync("git", ["ls-files", "--cached", "--others", "--exclude-standard", "-z"], {
+    cwd: repoRoot,
+    encoding: "utf8",
+  })
+    .split("\0")
+    .filter(Boolean);
+}
+
+export function synchronizeRepository({ repoRoot = REPO_ROOT, write = false } = {}) {
+  const policy = readPolicy(repoRoot);
+  const changes = [];
+  let references = 0;
+
+  for (const filePath of repositoryFiles(repoRoot)) {
+    const scope = policy.managedScopes.find((candidate) => isPathManaged(filePath, candidate));
+    if (!scope) continue;
+
+    const absolutePath = path.join(repoRoot, filePath);
+    const buffer = readFileSync(absolutePath);
+    if (buffer.includes(0)) continue;
+
+    const original = buffer.toString("utf8");
+    const result = synchronizeText(original, policy.roles[scope.role]);
+    references += result.references;
+
+    if (result.text === original) continue;
+
+    changes.push({ filePath, role: scope.role });
+    if (write) writeFileSync(absolutePath, result.text);
+  }
+
+  return { changes, references, policy };
+}
diff --git a/scripts/models/model-policy.test.mjs b/scripts/models/model-policy.test.mjs
new file mode 100644
index 000000000..4b1f9dfa5
--- /dev/null
+++ b/scripts/models/model-policy.test.mjs
@@ -0,0 +1,54 @@
+import assert from "node:assert/strict";
+import { test } from "node:test";
+
+import { isPathManaged, synchronizeText } from "./model-policy.mjs";
+
+const role = {
+  variants: {
+    bare: "gpt-5.5",
+    gateway: "openai/gpt-5.5",
+    langchain: "openai:gpt-5.5",
+    label: "GPT-5.5",
+  },
+};
+
+test("synchronizes supported OpenAI model identifier formats", () => {
+  const input = [
+    'model: openai("gpt-4o")',
+    'model: "openai/gpt-5.2"',
+    'model: "openai:gpt-5.4-mini"',
+    "GPT-4o recommended",
+  ].join("\n");
+
+  assert.deepEqual(synchronizeText(input, role), {
+    text: [
+      'model: openai("gpt-5.5")',
+      'model: "openai/gpt-5.5"',
+      'model: "openai:gpt-5.5"',
+      "GPT-5.5 recommended",
+    ].join("\n"),
+    references: 4,
+  });
+});
+
+test("does not rewrite unrelated packages or providers", () => {
+  const input = [
+    'import { encode } from "gpt-tokenizer";',
+    'model: "anthropic/claude-opus-4-8"',
+    'model: "google/gemini-3.6-flash"',
+  ].join("\n");
+
+  assert.deepEqual(synchronizeText(input, role), { text: input, references: 0 });
+});
+
+test("managed scope exclusions override broader paths", () => {
+  const scope = {
+    paths: ["examples", "packages/example/README.md"],
+    exclude: [{ path: "examples/provider-catalog", reason: "Different policy" }],
+  };
+
+  assert.equal(isPathManaged("examples/chat/route.ts", scope), true);
+  assert.equal(isPathManaged("packages/example/README.md", scope), true);
+  assert.equal(isPathManaged("examples/provider-catalog/models.ts", scope), false);
+  assert.equal(isPathManaged("benchmarks/generate.ts", scope), false);
+});
diff --git a/scripts/models/sync.mjs b/scripts/models/sync.mjs
new file mode 100644
index 000000000..98b2fd8ad
--- /dev/null
+++ b/scripts/models/sync.mjs
@@ -0,0 +1,38 @@
+import { synchronizeRepository } from "./model-policy.mjs";
+
+const args = new Set(process.argv.slice(2));
+const supportedArgs = new Set(["--check"]);
+const unknownArgs = [...args].filter((arg) => !supportedArgs.has(arg));
+
+if (unknownArgs.length > 0) {
+  console.error(`Unknown argument(s): ${unknownArgs.join(", ")}`);
+  process.exit(2);
+}
+
+const check = args.has("--check");
+const { changes, references, policy } = synchronizeRepository({ write: !check });
+
+if (references === 0) {
+  console.error("No managed model references were found. Check the configured scopes.");
+  process.exit(1);
+}
+
+if (changes.length === 0) {
+  console.log(`Model policy is synchronized across ${references} references.`);
+  process.exit(0);
+}
+
+if (!check) {
+  console.log(`Synchronized model policy in ${changes.length} file(s):`);
+  for (const { filePath } of changes) console.log(`  - ${filePath}`);
+  process.exit(0);
+}
+
+console.error("Model policy is out of sync:");
+for (const { filePath, role } of changes) {
+  const variants = Object.values(policy.roles[role].variants).join(", ");
+  console.error(`  - ${filePath}`);
+  console.error(`    expected ${role}: ${variants}`);
+}
+console.error("\nRun `pnpm models:sync` and commit the resulting changes.");
+process.exit(1);