Intern-S2-Preview-SimpleOPD

bingyang-lei/Intern-S2-Preview-SimpleOPD

Intern-S2-Preview-SimpleOPD is a image-text-to-text model from bingyang-lei. Use it for the image-text-to-text task on the model card, and read the license before you ship it in a product. It is set up for transformers. The card lists the license as apache-2.0.

Intern-S2-Preview-OPD is a post-trained version of Intern-S2-Preview, an efficient 35B scientific multimodal foundation model.

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.safetensors73.2 GB · 100%

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BF1635.6B · 99%

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Base models

internlm/Intern-S2-Preview

Model card

From the Hugging Face model README

Intern-S2-Preview-OPD

Intern-S2-Preview-OPD is a post-trained version of Intern-S2-Preview, an efficient 35B scientific multimodal foundation model.

The model is post-trained using the method introduced in SimpleOPD: Simple Tokenizer-Agnostic On-Policy Distillation of Long-Context Reasoning. This post-training process substantially improves the model's reasoning performance, particularly on challenging proof and mathematical reasoning benchmarks.

Evaluation Results

Model	ProofBench	AnswerBench	AIME25	AMOBench
Intern-S2-Preview	21.70	76.03	88.33	58.00
Intern-S2-Preview-OPD	44.50 (+22.80)	80.10 (+4.07)	95.00 (+6.67)	59.50 (+1.50)
SU-01 (Teacher Model)	45.00	77.50	94.60	61.75

The values in parentheses indicate absolute improvements over the base model.

Usage

Intern-S2-Preview-OPD uses the same model architecture and inference interface as Intern-S2-Preview. Please refer to the Intern-S2-Preview model card for deployment instructions and recommended inference settings.

License

This model is released under the Apache License 2.0.

Task: Image-Text-to-Text
Library: transformers
Type: intern_s2_preview
License: apache-2.0
Created: Aug 11, 2026
Updated: Aug 11, 2026