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AI is the model Chat and Personas use on this computer, the Personas on this device, and the facts saved as long-term memory. Click your name at the bottom of the sidebar, then Settings, then AI. The page opens on a portrait of the intelligence on this device, then three rooms: Model, Personas, and You.

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Choose a model

Picking a model does not download it yet. Apply starts the download and load.
1

Open AI

Click your name at the bottom of the sidebar, then Settings, then AI, then Model.
2

Open the catalog

Click the model field. Pick a family, then a size. Some models also ask you to pick a quantization. Models are listed by their catalog display names, not raw repository ids. Each row shows whether that model can accept images.
3

Check that it fits

Each choice shows how much memory it needs. A laptop mark means that model is already on this computer. A download mark means it is not. The footer shows free disk space.
4

Apply

Click Apply. Progress appears in the header as Downloading model or Loading model, with a percent. A model published in several parts shows which part is in progress.
If that model is already loaded, Apply stays off until you pick a different one. While the same model is downloading, click Apply again to stop it.
Thinking mode appears when the selected model can show its reasoning. It starts on. Leave it on to get Thinking and Thought process in Chat. Turn it off to skip that reasoning step.
Your device tier sets the model webAI starts on:
  • Tier 1 starts on TwIL 3B Pro.
  • Tier 2 and Tier 3 start on Meridian 1 12B. If Meridian 1 12B isn’t available, webAI starts on Gemma 4 12B.
  • Tier 4 starts on Gemma 4 31B.
A Persona that cannot run on the loaded model is unavailable in Personas until you apply a model that fits.

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Available models

The catalog lists these families and sizes. A size your Mac doesn’t have the memory for can’t be picked. Meridian 1 12B is text-only. To work with an image, apply a Gemma 4 or Gemma 3 model.
Meridian 1 appears in the catalog only when it is available on this Mac.

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Idle memory

On Macs with 16 GB of memory or less, the chat model frees its memory after 5 idle minutes. The next reply takes about 2 seconds longer to start while the model loads again. The model that searches your documents also frees its memory after 5 idle minutes on many Macs. If the chat model stops unexpectedly, webAI starts it again on its own. You do not have to restart the app.

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Personas

Personas on this page lists Personas on this device. Local Personas use the model you applied above. For chatting with a Persona and the full create flow, see Personas.

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You

You shows What webAI knows about you: facts a later chat on this device can use. Some are ones you add. Others are learned in chat. A Persona that runs on someone else’s device does not get them. The list holds up to 100 memories. Memory is not used with Gemma 4 E2B, Gemma 3 4B, or TwIL. With one of those models applied, the header shows Not active for this model. Your saved memories are kept, and you can still manage them.

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Add a memory

1

Write the fact

Type a short fact in the field at the top of You. When the list is empty, click a Try starter to begin a sentence.
2

Choose its kind and when it is used

Pick About you, How you like things, or Your work. Click Always use to include it in every chat. Leave it off to use the fact only when it is relevant.
3

Save it

Click Remember, or press Enter. The fact appears under its kind, marked Set by you.
webAI is built to decline passwords, keys, payment-card numbers, and health details as memories. Do not rely on that filter for anything sensitive.

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Change or forget a memory

The mark beside a memory switches it between every chat and only when relevant. Open a memory’s options and click Edit to change the text, or Forget to remove it. Undo brings back a memory you just forgot. Forget everything removes every memory on the list after you confirm. It cannot be undone. It does not clear greeting history. Greeting weather is on General.

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Common questions

No. Picking a model in Settings → AI does not download it yet. Click Apply to start the download and load. Progress appears in the header as Downloading model or Loading model.
Thinking mode appears when the selected model can show its reasoning. It starts on. Leave it on to get Thinking and Thought process in Chat. Turn it off to skip that reasoning step.
Under You, What webAI knows about you lists facts a later chat on this device can use. The list holds up to 100 memories. Memory is not used with Gemma 4 E2B, Gemma 3 4B, or TwIL.
A memory with Always use on is included in every chat on this device. With it off, the memory is used only when it is relevant to the conversation. Click the mark beside a memory to switch it.
Forget everything removes every memory on the list after you confirm. It cannot be undone. It does not clear greeting history.