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DeepSeek V4-Pro is DeepSeek's large MIT-licensed Mixture-of-Experts text model, listed on luv13 as luv13/deepseek-v4-pro and temporarily unavailable.

DeepSeek V4.1 Flash is DeepSeek's MIT-licensed multimodal Mixture-of-Experts model, available on luv13 as luv13/deepseek-v4.1-flash.

GLM 5.3 is Z.ai's flagship open-weight coding and agent model, available on luv13 as luv13/glm-5.3.

GLM-5.3 Flash is Z.ai's natively multimodal, MIT-licensed GLM-5 model, available on luv13 as luv13/glm-5.3-flash.

Kimi K3 is Moonshot AI's open-weight multimodal model for long coding and agent work, available on luv13 as luv13/kimi-k3.

Kimi K3 Fast is a model id luv13 lists as luv13/kimi-k3-fast, named after Moonshot AI's Kimi K3.

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.

Model fallback means trying a second luv13 model id when the first one is unavailable, instead of failing or waiting.

A model ID is the exact string, such as luv13/kimi-k3, that you put in the model field of a luv13 request to choose which model answers.

Model routing means sending each request to the model best suited for it, based on rules like task type, cost or speed.

luv13 is an OpenAI-compatible API for open-weight models at base URL https://api.luv13.ai/v1, and GET https://api.luv13.ai/v1/models returns the exact model ids you pass in the model field. Every model costs one flat $0.33 per 1M tokens, with input priced the same as output.

Qwen 3.8 27B is Alibaba's Apache-2.0 dense vision-language model from the Qwen3.8 series, available on luv13 as luv13/qwen-3.8-27b.