use app router

web/app/api/models/route.js

+import models from '../../../../models.json'
+import { NextResponse } from 'next/server'
+
+export async function GET(re) {
+  return NextResponse.json(models)
+}

web/pages/api/models.js

-import models from '../../../models.json'
-
-export default async function handler(req, res) {
-  return res.status(200).json(models)
-}