Legacy · backend
Use GPT-3.5 Turbo with Flask
Updated 2026-05-21 · By XALEN
How to use GPT-3.5 Turbo (Legacy, ~175B) with Flask. Install, authenticate, and make your first API call in minutes. Working code example included.
Model
GPT-3.5 Turbo
~175B · 16K context · $0.005 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="gpt-3-5-turbo",
messages=data["messages"]
)
return jsonify({"reply": response.choices[0].message.content})
if __name__ == "__main__":
app.run()
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Get API KeyLast updated: 2026-05-21