In plain words
Instant is chatmodel’s own model, and it’s where you start. It’s free, and there’s nothing to choose: it picks a light model for you and gives you a quick answer.
It covers the everyday basics. It can search the web for recent information, understand photos, read documents, and it can think before it answers when a question needs it. It’s the easy first step before you explore the other models.
How to get the most out of it
- Just ask, like you’d ask a friend. No special wording needed.
- Add one line of background. “For two people”, “I’m in Canada”, “keep it short”.
- Send the real thing. A photo of the label or the letter itself beats describing it.
- Ask it to search when the answer depends on today: hours, news, prices.
How it compares with the rest of the family
Instant is the quick, free way in. The other chat models in chatmodel are the ones you pick yourself. GPT 4o mini is another light option. For bigger jobs, GPT 5.5 is a strong all-rounder, Claude Sonnet 5 and Claude Opus 5 are liked for writing, and Gemini 3.1 Pro is Google’s careful Pro choice.
When to pick another model
Switch when the job needs more care: a letter that really matters, a long contract, a tricky decision. ChatGPT vs Claude and which model should I use help you choose.