Handwriting recognition — IAM test split
Four systems over the same handwritten lines from the canonical IAM-line test split, scored with the same character and word error rates.
4 systems · 120 lines · IAM-line test split · last run June 22, 2026 · IAM Handwriting Database · Handwriting benchmark writeup.
Winning result
Quality — 1.29% (okraPDF /v1)
Value — not scored on this board.
Speed — not scored on this board.
Leaderboard
| # | System | CER | WER | Lines read exactly |
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| 1 | okraPDF /v1 Document parser | 1.29% | 6.18% | 67.5% |
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| 2 | Gemini 3 Flash Vision model | 1.42% | 6.65% | 64.2% |
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| 3 | TrOCR-large-handwritten Specialist HTR | 3.68% | 11.24% | 45.0% |
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| 4 | Tesseract 5 Classic OCR | 49.58% | 91.10% | 0.0% |
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- Published IAM references, scored elsewhere on other splits: HTR-JAND 1.23% CER, GPT-4o-mini zero-shot 1.71%, TrOCR-large 2.89%.
- The run is ours; the corpus and the metrics are not. 120 lines is a small sample — treat gaps under a few tenths of a point as noise.