Choose a Model

Last updated October 28, 2026

Classgrid AI can answer with many different AI models. Most people leave it on Auto, which picks a good model for each message. If you want more control, you can pick a model yourself and change it for any message.

Auto (the default)

The model picker starts on Auto — "Picks the best model for each message". Auto is the easiest choice: you do not need to know which model is best at what. Use it unless you have a reason to pick something else.

The model list

Claude

Model	Good for
Claude Haiku 5.5	Fast, everyday answers and quick questions.
Claude Sonnet 5.5	A strong all-rounder for writing, research, files and code.
Claude Opus 5.5	Hard problems, long documents and careful reasoning.
Claude Fable 5.1	A premium model for the most demanding work.

Fable 5.1 is a premium model. If it is not available on your account, Claude Opus 5.5 is a good choice for hard work.

DeepSeek

Model	Good for
DeepSeek V4 Pro	Detailed reasoning, maths and code.
DeepSeek V4 Flash	Quick replies.

More models

Open More models in the picker to see the rest:

Family	Models
GPT-OSS	GPT-OSS 120B, GPT-OSS 20B
Kimi	Kimi K2.6, Kimi K2.7 Code
GLM	GLM 5.3, GLM 5.3 Flash, GLM 5.2, GLM 4.7 Flash
Qwen	Qwen 3.8 27B
Gemma	Gemma 4 26B
Nemotron	Nemotron 3 120B
Llama	Llama 4 Scout
Mistral	Mistral Small 3.1

Which one should I pick?

There is no single right answer. These are simple starting points:

You want…	Try
"Just make it work"	Auto
A quick answer or short rewrite	Claude Haiku 5.5 or a Flash model
A long report, research brief or careful analysis	Claude Sonnet 5.5 or Claude Opus 5.5
Help with code	Claude Sonnet 5.5, Claude Opus 5.5 or Kimi K2.7 Code
To compare how different models answer	Ask the same question, switch model, and ask again

Whichever model you choose, the agent still has its tools: web search, files, the code sandbox, images, PDFs, plugins and more. The model changes how it thinks and writes, not what it can reach.

How to switch models

In the message box, open the model picker (it shows Auto by default).
Pick a model from the list, or open More models.
Send your message. That message is answered by the model you picked.

Switching in the middle of a chat

You can switch model for any message, even halfway through a conversation. The new model sees the same chat, so you do not need to repeat yourself. A common pattern is to draft with a fast model, then switch to a stronger one for the final, careful version.

Credits

Using the AI uses your credits. If you run low, top up from Upgrade in the AI Hub. See Credits and top-ups.