model release
Baidu releases Unlimited-OCR-2, using SR-SWA to parse documents of unbounded length in a finite context window
Baidu released Unlimited-OCR-2 on 2026-10-27. It introduces Sparse Reference Sliding Window Attention (SR-SWA), which Baidu says keeps per-step decoding latency and memory nearly constant regardless of document length. Baidu claims state-of-the-art results on MPDocBench and MarathonDocBench.
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