stable v2.55.0
pydantic/pydantic-aiOct 5, 2026 → Oct 9, 20264 days between releases
What's New
Requires Python 3.11+ and introduces Postgres stores and prompt caching.
Breaking Changes
- Requires Python 3.11 or newer; Python 3.10 installs resolve to 2.54.0
New Features
- Adds Conversation object for state management across runs
- Adds PostgresStepStore and PostgresMediaStore backends
- Adds unified cache setting and Caching capability
- Adds support for claude-haiku-5-5 model
- Adds OpenAIDecisionsModel backend
Improvements
- Enhances prompt caching with unified settings and diagnostics
- Optimizes import time by lazily loading the MCP module
- Improves durable execution with tool request recording
- Enhances session core to handle realtime history and usage
Upgrade Notes
Ensure your runtime uses Python 3.11 or newer, as 3.10 support is deprecated. You can now configure message and media persistence using the new Postgres stores. The prompt caching settings have been unified for better cross-provider support.
The Two Releases
stable
Oct 5, 2026· 17 days ago
Maintenance release for n8n focusing on API key variable scope management and community node features.
Full release notesv2.55.0 (2026-10-09)
Oct 9, 2026· 12 days ago
This release enforces a Python 3.11+ requirement and introduces significant improvements to prompt caching, cross-provider support, and database backends. It adds a new `Conversation` object for state management across runs, support for the `claude-haiku-5-5` model, and new Postgres stores for messages and media.
Full release notes