Open Source · frontend

Use Yi Lightning with Next.js

Updated 2026-05-21 · By XALEN

How to use Yi Lightning (Open Source, 200B MoE) with Next.js. Install, authenticate, and make your first API call in minutes. Working code example included.

Model

Yi Lightning

200B MoE · 128K context · $0.04 input

Framework

Next.js

frontend · npm install xalen-sdk

1. Install

npm install xalen-sdk

2. Code

// app/api/chat/route.ts
import XALEN from 'xalen-sdk';

const client = new XALEN({ apiKey: process.env.XALEN_API_KEY });

export async function POST(req: Request) {
  const { messages } = await req.json();
  const response = await client.chat.completions.create({
    model: 'yi-lightning',
    messages,
    stream: true
  });
  return new Response(response.toReadableStream());
}

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Last updated: 2026-05-21