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all-MiniLM-L6-v2 Truncates at 256 Tokens: Your RAG Chunks Are Half Blind

This story is from 2026-09-19. It is preserved in the archive; the latest stories are on the live feed.

The answer was in the chunk. I could see it. Paragraph four of a 600-token chunk about our refund policy, word for word what the user asked. And my RAG pipeline refused to retrieve it, no matter how I rephrased the query. The bug wasn't in the vector database, the prompt, or the LLM. It was one num…

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  1. 2026-09-19 17:07 · DEV Community — Machine Learning
    all-MiniLM-L6-v2 Truncates at 256 Tokens: Your RAG Chunks Are Half Blind

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