Use Chat apps with llmapi.cheap

Run Chat apps on Gemini 3.8 Flash, Claude Sonnet 4.6, Claude Opus 4.6 or GPT-OSS with a single llmapi.cheap key. Plans start at $2 a month, and there is a free one-hour trial.

Protocol: OpenAI Chat

Fastest: one command

The setup command finds Chat apps on your machine, writes its configuration with your key and sets Gemini 3.8 Flash (high) as the default model. It needs no Node.js. Sign up first: your key is created automatically, and the dashboard shows this command with the key already filled in.

macOS / Linux

curl -fsSL https://llmapi.cheap/install.sh | sh

Windows (PowerShell)

irm https://llmapi.cheap/install.ps1 | iex

Manual setup

Chatbox, Cherry Studio and Raycast AI are set up by the setup command (the first two open an import prompt). Every other chat app (Jan, Msty, BoltAI, ChatWise, 5ire, LobeChat, TypingMind, NextChat, Witsy, AnythingLLM, Open WebUI) has an "OpenAI compatible" or "custom provider" option:

Base URL:  https://llmapi.cheap/v1
API key:   YOUR_API_KEY
Models:    fetched automatically, or e.g. gemini-3.8-flash-high

LibreChat (librechat.yaml):

endpoints:
  custom:
    - name: llmapi
      apiKey: "YOUR_API_KEY"
      baseURL: "https://llmapi.cheap/v1"
      models: { default: ["gemini-3.8-flash-high"], fetch: true }

Endpoints

Use the base URL that matches the protocol your tool speaks.

OpenAI

https://llmapi.cheap/v1

Anthropic

https://llmapi.cheap

Gemini

https://llmapi.cheap/v1beta

Models

https://llmapi.cheap/v1/models

Model IDs

Any of these work wherever Chat apps asks for a model name. Gemini 3.8 Flash (high) is the default the setup command picks.

Troubleshooting

• 401 / invalid key: check the key starts with sk-llm- and has no extra spaces. Create a new one under Dashboard → API keys if needed.
• Model not allowed: the free trial covers the Gemini models; Claude and GPT-OSS come with any paid plan.
• 404 on requests: OpenAI-style tools need https://llmapi.cheap/v1; Anthropic-style tools need https://llmapi.cheap without /v1.