A useful but little-known Gemini API feature 📎 Inline data or Files API? Choosing the right file input method matters more than you'd think. Gemini's "File input methods" guide explains the two ways to pass files to the model, helping you choose the optimal approach based on size and reuse patterns. 📌 Title: File input methods 🔗 URL: 🧩 Overview There are two main ways to give Gemini a file: embed it as Base64 inline data in your request, or upload it via the Files API and reference it by URI. Each has different size limits, reusability, and latency characteristics. Choosing wisely optimizes both performance and cost. 🛠 How to use it For small files (a few MB or less), inline data is the simplest approach, just include it in the request. For large files or files you'll reuse, upload via the Files API and reference the file URI. Once uploaded, a file can be reused across multiple requests without re-transferring. 🏗 Building it into production ・Chatbot image input: small one-off images go inline. Reference materials used repeatedly within a session get uploaded to Files API first. ・Batch processing: when running multiple analyses on the same file, upload once via Files API and reuse the reference ID to cut transfer costs. ・Document analysis pipelines: large PDFs must go through Files API. Small configs or short text can be inline. ・Mobile apps: in bandwidth-constrained environments, pre-upload via Files API to keep requests lightweight. 💡 Use cases 📱 Quick inline attachment of small files 📂 Files API upload for large files 🔄 Reusing the same file across multiple requests ⚡ Latency improvement through transfer optimization ⚠️ Watch out Inline data has size limits, and large files will error out. Files API uploads have an expiration, so pair with your own storage for long-term persistence. Rate limits on uploads also apply, so be careful when uploading many files in a short window. ✨ "Just inline everything" works at small scale, but the difference shows as you grow. Match input method to file characteristics for efficient design. #Gemini# #LLM#