v1.28.0

1.28.0 (2025-10-29)

Features

• Add safety_filter_level and person_generation for Imagen upscaling (aaceb1b)
• Add support for preference optimization tuning in the SDK. (f74660e)
• Pass file name to the backend when uploading with a file path (7115726)
• support default global location when not using api key with vertexai backend (f8967b1)
• Update test-server-sdk dependency to ^0.2.9. (8d507bf)

Bug Fixes

• Fix downloader. With this change after you await the download, the file write is complete, and the data is fully readable. (127c9bf)