Caty App

Caty App is a multi-model AI chat application that puts you in control. Connect to leading AI providers using your own API keys, or try Caty AI instantly with no setup required.

MULTIPLE AI MODELS

Chat with Claude (Anthropic), GPT (OpenAI), Grok (xAI), and any OpenAI-compatible provider. Switch between models anytime from the dropdown menu. Add unlimited custom providers.

COUNCIL MODE

Ask multiple AI models the same question and compare their perspectives. Tag models with @mentions and watch them respond one by one, each seeing what others said before them.

TRY CATY AI

No API keys? No problem. Purchase 100 messages for just €0.99 and start chatting instantly. Powered by Anthropic's Claude technology.

THREE UNIQUE THEMES

Choose your style — Caty (classic), Loli (minimal), or Neko (technical). Each theme has full light and dark mode support.

PRIVACY FIRST

Your data stays on your device. API keys are never sent to our servers. Chat history is stored locally with optional iCloud sync between your Apple devices.

KEY FEATURES

- Voice input and text-to-speech

- File and image attachments with AI analysis

- Web search integration

- Deep thinking mode with visible reasoning

- Markdown rendering with code highlighting

- Cross-device sync via iCloud

- Custom system prompts per chat

- Chat history with pinning

Free to use with your own API keys. All updates included.