Baidu Releases Unlimited-OCR 2 with Sparse Reference Sliding Window Attention
October 27, 2026
Unlimited-OCR 2 utilizes Sparse Reference Sliding Window Attention (SR-SWA) to compress text-visual attention into a fixed 512-token working set. This mechanism maintains constant per-step decoding latency and memory footprints, enabling unbounded document parsing across hundred-page benchmarks like MarathonDocBench.
HOW THIS AFFECTS YOU
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builderYou can parse extremely long documents without hitting quadratic memory scaling or latency bottlenecks.
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researcherThe SR-SWA method provides a way to bound computational complexity in long-sequence multimodal parsing.