Choosing a Model

GrantLoop runs on GPT-5.6, and gives you two versions of it to work with. You pick one from the model name below the chat box — click it and choose.

GPT-5.6 Terra — the default

Most efficient for everyday tasks. Terra runs everything unless you say otherwise: prospecting, drafting, research, browsing funder portals, answering questions about your workspace.

If you never touch the model picker, you are on Terra, and that is the right call for almost everything.

GPT-5.6 Sol — for complex tasks

Sol is the stronger of the two. Reach for it when a task involves genuine judgement rather than volume — a tricky eligibility call, a nuanced piece of writing, untangling a confusing funder requirement, or reviewing work you already have.

Sol uses your credits about 2.5× faster than Terra.

That is the whole trade. Sol draws on your monthly allowance at roughly two and a half times the rate — a task that takes 100 credits on Terra takes about 250 on Sol.

There is no discount and no penalty in switching — you are simply spending your allowance faster in exchange for a stronger model. Use it where the extra judgement earns its keep, and leave it off for routine work.

Switching

In chat: click the model name below the message box and pick. Your choice sticks for future chats until you change it again.

Switch at the start of a task where you can. The first message you send after changing models has to re-read the whole conversation from scratch, so it costs noticeably more than the messages around it — a long chat can spend 20–50 credits on that one message. It settles back down immediately afterwards, and switching back later is cheap. Changing models in a fresh or short chat costs almost nothing.

For a recurring task: open the task and choose a model in its settings. A change applies from the task's next run — a run already in progress keeps the model it started with. A task set to Sol shows a small GPT-5.6 Sol tag in your task list, so you can see at a glance which ones are on the pricier model.

Just ask: you can also tell the agent directly. "Set my Monday grant sweep to use Sol" or "put that task back on the default model" both work.

Which should I use?

Start on Terra and stay there. It handles the large majority of grant work well, and it is what every default and every recurring task uses out of the box.

Switch to Sol when you have hit something genuinely hard and want a second, stronger opinion — then switch back. Because Sol spends credits 2.5× faster, leaving a busy recurring task on Sol is the quickest way to burn through a month's allowance without meaning to.

If you are regularly running out of credits, the fix is usually a bigger plan rather than a smaller model — get in touch and we will help you size it.