LightOnOCR-3 4B

Name: LightOnOCR-3 4B
Author: LightOn

LightOn · released 2026-10-06 · data checked 2026-11-06

LightOnOCR-3 4B is a 4.5B-parameter OCR and document-parsing model from LightOn (FR), released 2026-10-06 under the Apache-2.0 license. It scores 86.3 on olmOCR-Bench (#3 of 24). It needs about 10.1 GB of memory at 16-bit.

LightOn's recommended model; Markdown plus boxes, figure and chart extraction.

OmniDocBench v1.6

—

Not reported

olmOCR-Bench

86.3

#3 of 24 models

Parameters

4.5B

OCR specialist

Memory to run

~10.1 GB

16-bit weights plus about 1 GB

Benchmarks

olmOCR-Bench Lab-reported86.3

Best: OXR 1.0 87.8

The tick marks the best score on each benchmark. See how to read the ranking.

Specifications

Lab: LightOn (FR)
Type: OCR / document parsing specialist
Total parameters: 4.5B
License: Apache-2.0
Memory to run: ~10.1 GB at 16-bit
Released: 2026-10-06

Weights and usage on Hugging Face ↗

Closest alternatives

Infinity-Parser2 Flash (2.2B, 86.0 on olmOCR-Bench, Apache-2.0)
Chandra OCR 2 (5.3B, 85.8 on olmOCR-Bench, OpenRAIL-M (modified))
Infinity-Parser2 Pro (35.1B, 87.6 on olmOCR-Bench, Apache-2.0)
OXR 1.0 (1.5B, 87.8 on olmOCR-Bench, OXR Open Source License)

Sources

https://huggingface.co/lightonai/LightOnOCR-3-4B

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