November 24, 2025
Let the PDFs duke it out
Show HN: OCR Arena – A playground for OCR models
OCR Arena turns PDFs into a fight club—fans demand speed, new champs, and handwritten smackdowns
TLDR: OCR Arena lets you upload images or PDFs and watch text-reading AI models battle on a public leaderboard. Commenters cheered for more contenders like Claude and Chandra, griped about slow loading, and pushed for benchmarks (like Textract) and handwriting vs print scores—because speed and accuracy both matter.
Meet OCR Arena, a gladiator pit for text-reading AI where you upload a file and watch models brawl for leaderboard glory. OCR (optical character recognition) means teaching computers to read images and PDFs, and this playground by extend.ai puts them head-to-head with win rates and ELO scores. The crowd immediately jumped in with fan-casting for new fighters: one cheerleader yelled “Claude would be good!” while another demanded, “Please add Chandra by Datalab.” Then came the drama—speed vs accuracy. A commenter flagged a model that loaded sloooow, asking if rankings consider lag or just quality, sparking a debate over whether fast-but-messy beats slow-but-perfect.
Old-school purists wanted a baseline: “Bring in Textract,” one said, meaning a classic pre–LLM (large language model) tool, and split scores for handwritten vs printed pages because reading doctor scrawl isn’t the same as reading a clean PDF. Meanwhile, HN mod [dang] left a cryptic housekeeping note with a link, adding just a hint of mystery. The vibe? Think Thunderdome for PDFs, Fight Club for receipts, and a lively crowd tossing popcorn as they argue over which model should enter next and whether “handwriting mode” deserves its own belt. It’s nerdy, it’s noisy, and it’s wildly useful.
Key Points
- •OCR Arena is a web platform for benchmarking OCR models via head-to-head battles.
- •The platform includes a Leaderboard showing Rank, Model, ELO, Win Rate, and Battles.
- •Users can start an anonymous OCR battle by uploading a file.
- •Supported input formats are PDF, JPEG, and PNG.
- •The platform is built by extend.ai.