The backend to use for the ranking expression evaluation.
Enums
Name
Description
RANKING_EXPRESSION_BACKEND_UNSPECIFIED
Default option for unspecified/unknown values.
BYOE
Deprecated: Use `RANK_BY_EMBEDDING` instead. Ranking by custom embedding model, the default way to evaluate the ranking expression. Legacy enum option, `RANK_BY_EMBEDDING` should be used instead.
CLEARBOX
Deprecated: Use `RANK_BY_FORMULA` instead. Ranking by custom formula. Legacy enum option, `RANK_BY_FORMULA` should be used instead.
RANK_BY_EMBEDDING
Ranking by custom embedding model, the default way to evaluate the ranking expression.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2026-05-09 UTC."],[],[]]
