Open Source · framework

Use Yi Lightning with Vercel AI SDK

Updated 2026-05-21 · By XALEN

How to use Yi Lightning (Open Source, 200B MoE) with Vercel AI SDK. 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

Vercel AI SDK

framework · npm install ai @ai-sdk/openai

1. Install

npm install ai @ai-sdk/openai

2. Code

import { generateText } from 'ai';
import { createOpenAI } from '@ai-sdk/openai';

const xalen = createOpenAI({
  apiKey: 'xln_test_YOUR_KEY',
  baseURL: 'https://api.xalen.io/v1'
});

const { text } = await generateText({
  model: xalen('yi-lightning'),
  prompt: 'What is Yi Lightning?'
});
console.log(text);

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Last updated: 2026-05-21