llm-lib demo

A unified JavaScript library for OpenAI, Anthropic, and Gemini

Configuration

Provider

Model

API Key (stored in localStorage)

Prompt

System Prompt (optional)

User Message

Response

Ready

Response will appear here...

Usage

// Include the library
import { LLM } from './llm-lib.js';

// Create an instance
const llm = new LLM({
  provider: 'openai',  // 'openai' | 'anthropic' | 'gemini'
  apiKey: 'your-api-key',
  model: 'gpt-4.1',
  systemPrompt: 'You are helpful.'
});

// Non-streaming
const response = await llm.prompt('Hello!');

// Streaming
for await (const chunk of llm.stream('Tell me a story')) {
  process.stdout.write(chunk);
}