#baidu

Long-document OCR is bottlenecked by page chunking and growing KV cache. A widely shared post says Baidu’s Unlimited-OCR uses 3B total parameters, 500M active parameters, and a 32K context window to read 40-page documents in one pass.

Why it matters: leaderboard gains are more meaningful when they arrive with a cheaper training bill. Baidu says ERNIE 5.1 Preview ranks #13 globally and #1 among Chinese labs on LMArena Text while using about 6% of the pretraining cost of comparable models.