Speech · backend

Use AssemblyAI Universal 2 with Flask

Updated 2026-05-21 · By XALEN

How to use AssemblyAI Universal 2 (Speech, ~2B) with Flask. Install, authenticate, and make your first API call in minutes. Working code example included.

Model

AssemblyAI Universal 2

~2B · Long-form context · $0.006/min input

Framework

Flask

backend · pip install xalen flask

1. Install

pip install xalen flask

2. Code

from flask import Flask, request, jsonify
from xalen import XALEN

app = Flask(__name__)
client = XALEN(api_key="xln_test_YOUR_KEY")

@app.route("/chat", methods=["POST"])
def chat():
    data = request.json
    response = client.chat.completions.create(
        model="assembly-ai-universal-2",
        messages=data["messages"]
    )
    return jsonify({"reply": response.choices[0].message.content})

if __name__ == "__main__":
    app.run()

AssemblyAI Universal 2 with Other Frameworks

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Last updated: 2026-05-21