Gemini File Search
Last Updated on: Feb 20, 2026
Gemini File Search
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AI Developer Tools
AI Knowledge Management
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AI Data Mining
AI Document Extraction
AI Files Assistant
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What is Gemini File Search?
Gemini File Search is a fully managed Retrieval Augmented Generation (RAG) tool in the Gemini API that simplifies grounding AI responses in your private data by automatically handling file upload, chunking, embedding with Gemini models, indexing, and semantic retrieval for accurate, context-aware answers. Developers create persistent File Search stores to hold embeddings indefinitely, upload files directly or via Files API supporting formats like PDF, DOCX, TXT, JSON, code files, and more up to 100MB each, with custom chunking configs for optimal retrieval. It provides citations linking responses to source chunks for verification, metadata filtering for targeted searches, structured outputs for JSON schemas, and integrates seamlessly into generate Content calls without other tools. Free storage and query-time embeddings make it cost-effective, charging only initial indexing ($0.15/1M tokens) plus input/output tokens, with limits scaling by tier up to 1TB for enterprises.
Who can use Gemini File Search & how?
  • Developers: Build RAG apps without vector DB management or custom pipelines.
  • Enterprise Teams: Ground Gemini in internal docs for secure knowledge retrieval.
  • App Builders: Create chatbots, search tools with citations and metadata filters.
  • Data Analysts: Query large file sets semantically across diverse formats.
  • Product Owners: Scale AI with free storage and low-cost embeddings.

How to Use Gemini File Search?
  • Create Store: Use API to make a File Search store for your embeddings.
  • Upload Files: Directly via uploadToFileSearchStore or import from Files API.
  • Query Data: Add FileSearch tool to generateContent with store name and prompt.
  • Manage & Refine: List/delete docs, add metadata filters, check citations.
What's so unique or special about Gemini File Search?
  • Fully Managed RAG: Auto-chunks, embeds, indexes without external services.
  • Semantic Vector Search: Gemini embeddings understand context beyond keywords.
  • Automatic Citations: Links answers to exact source chunks for trust.
  • Free Storage/Queries: Pay only indexing plus standard tokens.
  • Metadata Filtering: Target subsets like specific authors or years.
Things We Like
  • Dead simple integration into existing Gemini API calls.
  • Semantic search beats keyword matching for relevance.
  • Citations enable easy fact-checking and audits.
  • Broad file support from PDFs to code files.
Things We Don't Like
  • Can't combine with other tools like Google Search.
  • Chunk-based may miss full-document context needs.
  • Occasional retrieval quirks with large stores.
  • Project storage limits by tier.
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FAQs

A managed RAG tool in Gemini API for uploading files, semantic retrieval, and grounded responses with citations.
PDFs, DOCX, TXT, JSON, code files, spreadsheets, and many more up to 100MB.
Yes, file storage and query embeddings are free; pay for initial indexing only.
Responses include grounding_metadata linking to source chunks for verification.
Yes, use metadata key-value pairs for targeted retrieval like author or date.

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