Arthur Platform

• Improved support for custom metrics: You can now test a custom metric before creating it
• New agentic features are arriving in January 2026 that will provide powerful tools for testing, tracing, and deploying agent based workflows.
  • Interested in trying it first? Email [email protected] to join the early access group. Arthur Evals Engine OSS

Enhancements

• Enhancements to PII detection model to improve date/time identification.
• Docker configuration has been updated to use Postgres version 15, ensuring compatibility & preventing initialization errors during new engine setup.

Bug Fixes

• Fixed an issue where some metrics were missing from the selection list for custom datasets.
• Increase ML engine aggregation timeout to support segmentation of larger & more complex datasets.

Community

• Venture Backed Startup?
  • Join Arthur’s Start Up Partner Program: If you’re building a venture-backed startup that uses AI Agents and are trying to figure out how to reliably ship them to production, this program is perfect for you. Apply Today