I haven't checked OlmOCR, but in my experience, Tesseract is awful for scientific papers. The structure is mangled, formulas are completely rubbish, tables are

I haven't checked OlmOCR, but in my experience, Tesseract is awful for scientific papers. The structure is mangled, formulas are completely rubbish, tables are nearly useless, etc. I also tried Docling (which I believe is LLM-based), which works fine, but the references section of the paper was too noisy, and Gemini 2.0 Flash was okay but too slow for a large number of PDFs[1]. I settled for downloading the LaTeX code from arXiv and using pandoc to parse that. I also needed to process citations, which was easy using pandoc's support for BibTeX to CSL JSON. [1] Because of the number of output tokens, I had to split the PDF into pages and individually convert each one. Sometimes, the API would take too long to respond, making the overall system quite slow.