AI Chat requires an internet connection and connects to the AI Chat service to answer. AI Chat is a fast, focused desktop assistant for Windows, powered by Anthropic's Claude models — Opus 5.5, Sonnet 5.5 and Haiku 4.5 — through the Claude API, with additional models for extended capacity once an answer mode's daily Claude allowance is used. Ask questions, draft and rewrite text, summarise documents, work through problems, and keep every conversation on your own PC. Three Claude models. Quick (Haiku 4.5) for snappy replies to quick questions and short drafts. Balanced (Sonnet 5.5) for thoughtful help with writing, code and analysis. Deep (Opus 5.5) for complex, multi-step problems. Switch between them from the menu in the chat box at any time. Your history stays yours. Conversations are stored in a local database on your PC and searchable in full. Group chats into projects. Attach images. Open an incognito chat that is never written to disk. Pro, when you want more. Unlock Sonnet 5.5 and Opus 5.5, get more messages every day, and keep your conversation going with extended capacity when you need it. Fair-use limits apply. Made for Windows. Light and dark themes, a system tray presence, keyboard-first navigation, and a chat list that folds away when you want the whole window. Powered by Anthropic's Claude API, with additional models for extended capacity. AI Chat is an independent third-party app from HAYAH, not affiliated with or endorsed by Anthropic, Claude, or Claude Code.
Productivity · Windows · Free
