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Open Datasets
The Cauldron
Multimodal

The Cauldron

An open-source data set containing 50 vision-language datasets, designed to train multimodal models like Idefics2.

Download dataset
Size

1.88 million entries, 169 GB, Parquet formats (images and text)

Licence

CC-BY 4.0

Description

The Cauldron is a vast aggregate of 50 vision-language datasets, used for fine-tuning the Idefics2 model. It includes only the training sets, in a unified format (Parquet), combining images and descriptive texts. The game has been carefully “decontaminated” by removing examples that cross the MMMU, MathVista, and MMBench benchmarks.

What is this dataset for?

  • Train multimodal models (VLMs) on a wide variety of image/text tasks
  • Improve performance on tasks such as captioning, VQA, OCR, or visual reasoning
  • Establishing a robust basis for fine-tuning or pre-training open-source architectures

Can it be enriched or improved?

Yes. It is possible to complete this dataset with additional annotations (e.g. difficulty levels, languages, scene types) or to add image/text enhancement modules to diversify the entries. It can also be filtered to build thematic sub-corpora.

🔎 In summary

Criterion Evaluation
🧩 Ease of use⭐⭐✩✩✩ (Requires Parquet handling and multimodal understanding)
🧼 Need for cleaning⭐⭐⭐⭐⭐ (Low – already pre-filtered and duplicates removed)
🏷️ Annotation richness⭐⭐⭐⭐✩ (Variable depending on sub-datasets – generally high)
📜 Commercial license✅ Yes (CC-BY 4.0)
👨‍💻 Beginner friendly⚠️ Complex – requires knowledge in VLMs
🔁 Fine-tuning ready✅ Specifically designed for multimodal fine-tuning
🌍 Cultural diversity🌏 High – aggregation of multiple sources at a global scale

🧠 Recommended for

  • VQA model developers
  • Multimodal AI researchers
  • R&D teams in NLP+Vision

🔧 Compatible tools

  • Transformers
  • PyTorch
  • Jupyter
  • VLLM
  • Hugging Face Datasets

💡 Tip

Filter the subsets most suited to your task (captioning, QA, OCR...) to reduce the need for training resources.

Frequently Asked Questions

What types of tasks can you train with this dataset?

It allows you to train models for captioning, VQA, OCR, visual reasoning, and any task combining image and text.

Is it possible to select a subset of the dataset?

Yes, since the dataset is an aggregation of 50 sources, it is easy to filter some of them according to the needs of a specific project.

Is it suitable for training limited GPU models?

By filtering and reducing image sizes and textual contexts, partial exploitation is possible on more modest machines.

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