Models, limits & cost
The single most useful habit on the free tier: knowing which AI model to reach for, and when. Most beginners burn through their daily limit on the strongest model doing work a cheaper one would have done faster — and then can't work for hours. Here's how to avoid that.
The three models, in plain words
You'll meet a small family of models. They trade depth against speed and cost — the deeper one "thinks" harder but is slower and uses up more of your allowance.
| Model | Think of it as | Good for |
|---|---|---|
| Haiku | The quick one | Fast, cheap, light tasks — short answers, simple lookups, quick edits. |
| Sonnet | The workhorse | Everyday building — writing HTML/CSS, wiring up an automation, routine edits. Fast and plenty capable. |
| Opus | The deep thinker | The hard, ambiguous calls — planning, untangling a gnarly bug, judgment that needs real reasoning. |
The rule: volume → cheap, leverage → strong
Here is the whole policy in one line:
Volume → a cheap model. Leverage → a strong one.
- High-volume, routine work (formatting a page, adding fields to a form, repetitive edits) → Sonnet. It's faster and won't eat your allowance.
- Low-volume, high-leverage work (deciding what to build, reviewing a plan, fixing something that has you stuck) → Opus. This is where the deep model earns its cost.
- Don't want to think about it? Run opusplan — an automatic hybrid where the strong model plans and the fast one builds. You get the judgment where it matters and the speed everywhere else.
Switching mid-session
You don't pick a model once and live with it. Switch whenever the work changes character — type the command right in the chat:
/model sonnet # routine building — fast and cheap
/model opus # stuck on something hard — bring in the deep thinker
/model opusplan # let it auto-switch: plan strong, build fast
A natural rhythm: stay on sonnet for the steady work, flip to opus the moment you hit something that genuinely needs untangling, then flip back. Or just run opusplan and let it decide for you.
Managing your limits without frustration
On the free tier you have a daily allowance. The way to never feel cornered by it:
- Default to the cheaper model. Most of what you do is routine — let it be cheap. Save the strong model for the few moments that need it.
- Front-load the thinking. Use the strong model to make the plan, then let the cheap one execute it. One expensive decision beats ten expensive attempts.
- Notice when you're idling. If you find yourself waiting hours for the limit to reset, that's the signal worth sitting with: a paid tier that lets you keep shipping — and earning — usually beats idling for the reset. We say this honestly, not to push you: the whole point of the Academy is that the always-free craft is genuinely enough to build real things. But once your ideas are making or saving you money, paying for the tool that makes them is no longer a cost — it's leverage. (More on that line in what's always free, and what's not.)
A note that won't go out of date
opus, sonnet, haiku and opusplan point to the current recommended version and roll forward on their own as new generations ship — so this lesson doesn't rot. Wherever you can, write your instructions with the alias, never a dated version string. (Specific version details on this page are valid as of 2026-06-26; the aliases themselves keep updating without you.)