Baidu Open-Sources Unlimited OCR 2 for Hundred-Page Document Parsing

Baidu released Unlimited OCR 2, a 3.34B-parameter OCR model under the MIT license that parses documents of hundreds of pages in a single request using SR-SWA, a sparse attention scheme that keeps per-step decoding cost nearly flat. Baidu reports first place on MPDocBench (84.6) and MarathonDocBench (77.1), with heading hierarchy its lowest sub-score at 48.2 on long documents. All benchmark figures are self-reported, and the model runs on one CUDA GPU in BF16 with code on GitHub.