Welcome
Start building with open models at frontier quality.
Follow the quickstart, connect your app or coding agent, and go live.
Get started
- Quickstart ↗ Send your first request in less than 2 minutes.
- Migrate from OpenAI / OpenRouter ↗ Two lines change.
Use with your tools
- Claude Desktop ↗ Open models in Claude Desktop app. No code.
- Codex ↗ Open models in Codex, desktop and terminal.
- Anthropic-compatible API ↗ Anthropic Messages format, every Keln open model.
- OpenAI SDK and compatible clients ↗ Your own app in Python, TypeScript, LangChain, Vercel AI SDK, or plain curl.
Explore Keln
- Playground ↗ Try any model in the portal and see latency and cost per response.
- Models & pricing ↗ Every model, its context window, and its price per million tokens.
- API reference ↗ Endpoints, parameters, streaming, errors.
Overview
- What is Keln ↗ How Keln makes open models reliable, and what runs on every request.
- How Keln works ↗ What happens between your request and your first token.