model: use text task prefixes for gemini-embedding-2; improve doc prefix#4851
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Samoed
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Jun 23, 2026
KennethEnevoldsen
approved these changes
Jun 23, 2026
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Two fixes:
taskType. Ref: https://ai.google.dev/gemini-api/docs/embeddings#gemini-embedding-2.taskTypeis documented forgemini-embedding-001;gemini-embedding-2is recommended to directly format task prompts as text prefixes, e.g.,task: fact checking | query: {content}for fact verification tasks;task: sentence similarity | query: {content}for STS etc.Note: I ran a small API check and verified that passing different
taskTypevalues leads to identical embeddings forgemini-embedding-2; so it's removed fromEmbedContentConfig.title: none | text: {text}to align with the official docs. In previous implementation, documents were only formatted when a title existed.Ran a few tasks before fix vs. after fix to validate: