Choosing an AI model

Compare chat models: Auto, GPT 5.6 Sol/Terra/Luna, Claude Fable 5, Gemini 3.7 Flash, DeepSeek V4, Grok 4.6, MiniMax M3.

Written By Umakhan Magomedov

Last updated 3 days ago

VocaLingo Chat supports several AI models. Default is Auto: the app picks a model per message. Switch anytime. Token cost depends on the model and message length.

Available models

Model

Best for

Notes

Auto

Mixed everyday tasks

Default. Routes each message.

GPT 5.6 Sol

Hard reasoning, complex work

Frontier quality, fewer tokens than older GPT flags.

GPT 5.6 Terra

Everyday balance

Intelligence and cost in the middle.

GPT 5.6 Luna

Fast everyday answers

Cheap, 1M context, files supported.

Claude Fable 5

Hardest projects

Most capable Claude in the picker.

Claude Opus 5

Code and long writing

Near-Fable quality at a lower price.

Claude Sonnet 5

Agent-style tasks

Near-Opus quality at Sonnet price.

Claude Sonnet 4.6

Code, long documents

Fast Claude option still in the list.

Gemini 3.1 Pro

Big docs, images

Strong multimodal, long chats.

Gemini 3.7 Flash

Fast cheap answers

Near-frontier quality for most tasks.

DeepSeek V4 Pro

Code and reasoning

1M context. No file attachments.

DeepSeek V4 Flash

Cheap technical answers

No file attachments.

Grok 4.6

Current events, agents

Up-to-date knowledge and coding.

MiniMax M3

Long context, code

1M context. Images supported.

How to switch models

  1. Open the Chat tab.

  2. Tap the model name above the input field.

  3. Use the Text tab for chat models or the Images tab for image models.

New messages use the selected model immediately. Older chats keep the model name that actually answered.

Frequently asked questions