Calibre 9.8 was released in May 2026, with the headline addition being support for local AI providers that expose an OpenAI-compatible API. Users can now connect Calibre’s AI-assisted features (such as dictionary lookups, annotations, and summaries) to self-hosted models running via Ollama, OpenRouter, or any compatible backend — keeping data fully local and offline without relying on third-party cloud services.
Other improvements in 9.8
- Content server improvements for better mobile usability
- Native TTS (text-to-speech) engine enhancements
- Bug fixes for the book editor
- News feed integration updates
Calibre 9.8 is available for 64-bit and ARM64 Linux, Windows, and macOS via direct binary download, Flatpak, or distro repositories.