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AI tool

Jan

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Run downloaded language models in a desktop assistant, or connect cloud providers and a local compatible API.

jan.aiSources reviewed
Starting price
$0 software licence
Free access
Self-managed edition
Billing unit
Compute / provider usage separate
Platform
Windows / macOS / Linux
Verified
17 Oct 2026

Overview

What you provide

  • You provide prompts, a downloaded model or provider connection.

What you get

  • You receive chat responses and local API responses.

Choosing this tool

Choose Jan when you want a local chat app plus a local OpenAI-compatible server in the same tool. The cloud-provider list is an option, not evidence that every conversation stays on the device. Choose GPT4All for a LocalDocs-first workflow or LM Studio when its model-management workflow suits your team.

A decision worked through

For a private draft, record the selected model and endpoint before sending it. A localhost:1337 client can address Jan, but selecting a cloud provider changes the processing route even though the desktop interface looks similar.

Jan alternatives: choose an implementation route

For Jan, compare local chat plus an API endpoint with desktop model management and LocalDocs; keep cloud connections separate from local inference.

ProductDeployment requirementsFree allowanceInput → outputKey limit
JanRead profileOfficial source ↗Windows/macOS/Linux desktop app with a localhost:1337 API. Download a model that fits device memory; cloud-provider mode is a separate route.Self-managed editionPrompts, a downloaded model or provider connection → Chat responses and local API responsesSee the product-specific review limits below.
LM StudioRead profileOfficial source ↗Desktop app with downloaded local models; choose model size against available memory. Bionic cloud access does not upgrade local hardware.Local FreeInput: prompts and local documents. Output: model responses and document answers. Review citations and factual claims before reuse.Initial model/runtime downloads require connectivity. Model size must fit your hardware. Offline capability does not establish the privacy of optional cloud services or third-party tools.
GPT4AllRead profileOfficial source ↗Desktop installer and LocalDocs; CPU inference supported without a required GPU. Model files still need sufficient RAM; model licences vary.Self-managed editionLocal models, prompts and a LocalDocs collection → Chat answers and document-retrieval responsesThe application licence and individual model licences differ. Linux architecture and available memory constrain model choice; large documents still need retrieval and answer checks.

Setup & workflow

  1. Install the desktop app.
  2. Download a hardware-appropriate model.
  3. Verify local selection.
  4. Try a short prompt.
  5. Enable API or tools only when needed.
Requirements & installation
  • Windows / macOS / Linux

Limits & review

  • Model size must fit RAM and acceleration support. MCP tools can introduce external connections or actions; local inference alone does not make every tool offline.

Your part

  • Check which provider will receive a prompt and review permissions for each enabled MCP tool.
Sources & verification6

This profile is based on official sources, not a hands-on product test.

Vendor descriptions and demos document advertised features. Editorial guidance is based on these sources.

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