Show HN: Infinity – Git-style branching for AI chats

Infinity is a free macOS app (version 0.1.5, macOS 14+, Apple silicon and Intel, early testing) that lets every AI answer branch, with forks from any phrase, a Canvas view mapping all branches, and side-pane or inline continuation. It supports local models via Ollama, LM Studio and Apple Intelligence plus cloud providers including OpenAI, Anthropic, Google and OpenRouter, can send one message to up to four models at once, and adds Code and Assistant modes with shared projects. The app requires no account and includes no ads or analytics, keeping chats, settings and the file index on the Mac and API keys in the Keychain.