---
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