---
title: Engineering Specs
slug: /developer/engineering
description: Jan is a ChatGPT-alternative that runs on your own computer, with a local API server.
keywords:
  [
    Jan AI,
    Jan,
    ChatGPT alternative,
    local AI,
    private AI,
    conversational AI,
    no-subscription fee,
    large language model,
    spec,
    engineering,
  ]
---

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Talk about CoreSDK here
