What Is luv13

Reviewed by Proof · Updated

Definition

luv13 is an OpenAI-compatible API that serves seven open-weight models from one base URL and one API key, at one flat price per token.

Key takeaways

  • luv13 speaks the OpenAI request and response format, so most OpenAI tools and SDKs work with it after three changes: the base URL, the API key and the model id.
  • The base URL is https://api.luv13.ai/v1.
  • One API key works for all seven models. The current list is always at GET /v1/models.
  • Every model costs a flat $0.33 per 1M tokens, and input costs the same as output. See Pricing.
  • Billing is prepaid: you top up credit in the dashboard and usage draws it down. There's no subscription.

How it works

You send a request to a luv13 endpoint, name the model you want in the model field, and get back a response in the OpenAI format. You don't need a separate account or key for each model.

The two endpoints luv13 serves are:

EndpointWhat it does
GET /v1/modelsLists the models you can call. See Listing Models.
POST /v1/chat/completionsSends a conversation to a model and returns its reply. See Chat Completions.

Other OpenAI endpoints, such as /v1/embeddings, aren't served. See Endpoints.

New to base URLs? See Base URL and OpenAI-Compatible APIs.

The models

As listed by live GET /v1/models on 2026-09-30:

ModelId
DeepSeek V4-Proluv13/deepseek-v4-pro
DeepSeek V4.1 Flashluv13/deepseek-v4.1-flash
GLM 5.3luv13/glm-5.3
GLM-5.3 Flashluv13/glm-5.3-flash
Kimi K3luv13/kimi-k3
Kimi K3 Fastluv13/kimi-k3-fast
Qwen 3.8 27Bluv13/qwen-3.8-27b

Each name links to that model's page. The model list is also at Models.

Pricing

Every model costs a flat $0.33 per 1M tokens, and input tokens cost the same as output tokens (checked against live luv13.ai/pricing on 2026-09-30). For example, 800,000 input tokens plus 200,000 output tokens is 1.0M tokens, which costs $0.33. The Pricing page is the source of truth.

Getting started

  1. Get an API key from the dashboard. See Keys and Accounts and Authentication.
  2. Point your client at https://api.luv13.ai/v1.
  3. Pick a model id from GET /v1/models and send a request.
curl https://api.luv13.ai/v1/chat/completions \
  -H "Authorization: Bearer $LUV13_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "luv13/glm-5.3-flash", "messages": [{"role": "user", "content": "ping"}]}'

For the request format, see Chat Completions.