Migrating from OpenAI

Reviewed by Proof · Updated

Definition

Migrating from OpenAI means moving code that calls the OpenAI API over to luv13 by changing the base URL, the API key and the model id.

Key takeaways

  • Change three things: base URL to https://api.luv13.ai/v1, API key to your sk-luv13- key, and model to a luv13 id such as luv13/glm-5.3-flash.
  • luv13 serves two endpoints: GET /v1/models and POST /v1/chat/completions. Code that only uses chat completions moves over most easily.
  • Endpoints such as /v1/embeddings, /v1/completions and /v1/responses return 404 on luv13. Keep those calls where they are or remove them.
  • The official OpenAI Python and Node.js SDKs connect with only the client settings changed: on 2026-09-30 both listed luv13's models and returned luv13's 401 error without a key.

The three changes

SettingOpenAIluv13
Base URLhttps://api.openai.com/v1https://api.luv13.ai/v1
API keysk-... from OpenAIsk-luv13-... from the luv13 dashboard
ModelAn OpenAI model nameOne of the seven ids from GET /v1/models

Python

import os
from openai import OpenAI

client = OpenAI(
    base_url="https://api.luv13.ai/v1",
    api_key=os.environ["LUV13_API_KEY"],
)
reply = client.chat.completions.create(
    model="luv13/glm-5.3-flash",
    messages=[{"role": "user", "content": "ping"}],
)
print(reply.choices[0].message.content)

If your code builds the client with no arguments, you can set OPENAI_BASE_URL=https://api.luv13.ai/v1 and OPENAI_API_KEY to your luv13 key instead. Both SDKs read those variables. See Environment Variables.

Checklist

  1. Find every place a model name is hard-coded and replace it with a luv13 id. See Model IDs.
  2. Remove or reroute calls to endpoints luv13 doesn't serve. See Endpoints.
  3. If you send images, pick a model that accepts them. See the model list.
  4. Test the optional features you depend on, such as streaming, tools and JSON output. luv13 hasn't published per-model support yet. See Request Parameters.
  5. Update cost math: one rate, $0.33 per 1M tokens, input the same as output. See Estimating Costs.