src/app/api/models/route.js

import { NextResponse } from "next/server";
import { MODEL_CATALOG, MODELS_BY_PROVIDER, PROVIDER_META, DEFAULT_MODEL } from "@/lib/ai/models";

export async function GET() {
  return NextResponse.json({
    models: MODEL_CATALOG,
    byProvider: MODELS_BY_PROVIDER,
    providers: PROVIDER_META,
    default: DEFAULT_MODEL,
  });
}