Reasoning · frontend

Use o3 with Svelte

Updated 2026-05-21 · By XALEN

How to use o3 (Reasoning, ~1T) with Svelte. Install, authenticate, and make your first API call in minutes. Working code example included.

Model
o3
~1T · 200K context · $0.10 input
Framework
Svelte
frontend · npm install xalen-sdk

1. Install

npm install xalen-sdk

2. Code

<script>
import XALEN from 'xalen-sdk';

const client = new XALEN({ apiKey: 'xln_test_YOUR_KEY' });
let reply = '';

async function ask(question) {
  const res = await client.chat.completions.create({
    model: 'o3',
    messages: [{ role: 'user', content: question }]
  });
  reply = res.choices[0].message.content;
}
</script>

<p>{reply}</p>

o3 with Other Frameworks

Python JavaScript React Next.js Flask FastAPI Django Express.js

Other Models with Svelte

Vedika Standard Vedika Fast Vedika Pro Ultra Vedika Vision Vedika Code Vedika Astro Agent

200+ models. One API. Works with any framework.

Get API Key

Last updated: 2026-05-21