Choose a model

How to pick which model runs a Copilot chat, what each one is suited to, and where to set the one new chats start with.

Copilot runs on a language model, and you can pick which one. It is the model that reads your request, plans the work, and talks back to you. Which image or video model makes the media is a separate setting, under 'Model preferences' in the prompt bar.

The models

Model	Suited to
Auto	Picks the best model for each task. The default
Sonnet 4.6	Balanced intelligence and speed for most tasks
Grok 4.5	Fast, direct responses for everyday tasks
GPT 5.6 Sol	Deep reasoning for complex, multi-step tasks
Fable 5.1	Creative, polished responses for storytelling and ideation

Leave it on 'Auto' unless you have a reason not to. GPT 5.6 Sol and Fable 5.1 need a paid plan. Some models are listed but dimmed; those cannot be picked yet.

Pick one for a chat

1. Open Copilot

2. Click the button at the bottom right of the prompt bar. It reads mode first and model second, so 'Auto · Sonnet 4.6' is automatic generation running on Sonnet 4.6

3. Under 'Model', open the dropdown and pick one. A checkmark marks the active model

The choice belongs to the chat, so chats can run on different models at once, and it holds until you change it.

Set the default for new chats

1. Open 'Preferences'

2. Beside 'Default chat mode', open the dropdown

3. Pick the model under 'Model', and the mode under 'Mode' while you are there

New chats start on that model. Changing one chat's model does not change the default.

That's how you choose a model on Morphic. Most work is fine on 'Auto'; pick one yourself when a chat calls for speed or for more reasoning.

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If you have any trouble or have any questions, feel free to reach out. We're happy to help. Write to us at [e-mail].