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SAVRN Model Hub · Models by License

Open-Weight Models Under Open RAIL License

11 open-weight models released under Open RAIL License in the SAVRN Model Hub, with Datalab, Tiantian Feng and Umienglishschool publishing the most.

11Models
7Publishers
686M to 5.3BParameter range
1Licenses
Yes, with conditionsCommercial use

What Open RAIL License Allows

Open RAIL licenses permit use, including commercial use, subject to the use-based restrictions listed in the license, which must be passed on to anyone who receives the model or a derivative. Read the license text.

SAVRN's Take

Open RAIL++ sits in the permitted-with-conditions column of our license table. The grant covers use, including commercial use, subject to the use-based restrictions listed in the license. The pass-through is the clause to plan around: those restrictions travel with the weights, so anyone you serve the model to inherits them. If you fine-tune, host or resell an image service built on one of these checkpoints, the terms your customers accept need to carry the same restrictions the publisher wrote, and your serving stack needs a way to refuse the prohibited uses at the API boundary.

Eight models on our hub carry this license, and six of them are text to image. Stable Diffusion XL base 1.0 from Stability AI leads at 2,908,046 downloads a month, and most of the rest descend from it: Cagliostro Labs' Animagine XL 4.0 at 349,474 and 3.1 at 191,212, the Diffusers inpainting build at 103,700 and ByteDance's SDXL-Lightning at 88,346. The 2.6B parameter SDXL checkpoints need 6.2 GB at 16-bit, 3.1 GB at 8-bit and 1.5 GB at 4-bit, so one accelerator carries them; the cheapest Index host is one MI300X at $1.85 an hour. The outlier is S NLP's roberta_toxicity_classifier, a text classification model with a 514 token context, at 261,614 monthly downloads.

Before committing, read the restriction list against what your customers will actually generate. The hardware decision is small; the license decision is the one to get right.

Most Downloaded

ModelPublisherParametersLicenseMonthly downloadsCheapest GPUs at 16-bit
chandra-ocr-2 Datalab 5.3B openrail 2.8M 1x MI300X, $1.85/hr
surya-ocr-2 Datalab 686M openrail 1.3M 1x MI300X, $1.85/hr
surya-ocr-2-gguf Datalab openrail 1.1M
surya_layout2 Datalab openrail 21.5k
whisper-large-v3-msp-podcast-emotion-dim Tiantian Feng 1.5B openrail 5.7k 1x MI300X, $1.85/hr
whisper-large-v3-msp-podcast-emotion Tiantian Feng 1.5B openrail 5.5k 1x MI300X, $1.85/hr
Emma_Vaganova Nzonzi Mambou openrail 44
RetroArter Rui Pedro openrail
Talk Umienglishschool openrail
Lodo-lora-sdxl2 Leonardo Faccio openrail

All 11 Models

Model · Image and text to text

chandra-ocr-2

Datalab

Chandra 2 is a state of the art OCR model from Datalab that outputs markdown, HTML, and JSON. It is highly accurate at extracting text from images and PDFs, while preserving layout information. Try Chandra in the free playground, or use the hosted API for higher accuracy and speed. - 85.8% olmocr bench score (sota), 77.8% multilingual bench score (12% improvement over Chandra 1) - Significant improvements to math, tables, complex layouts - 90+ language support with major accuracy gains - Convert documents to markdown, HTML, or JSON with detailed layout information - Reconstructs forms accurately, including checkboxes - Strong performance with tables, math, and complex layouts - Extracts…

Open weights openrail 5.3B parameters 262,144 tokens transformers

Model · Image and text to text

surya-ocr-2

Datalab

Surya is a 650M param OCR model with these features: - Accuracy - scores 83.3% on olmOCR-bench (top under 3B params) - Multilingual - scores 87.2% on an internal benchmark set of 91 languages (more here) - Layout analysis (table, image, header, etc.) with reading order - Table recognition (rows + columns) It works on a range of documents (see usage and benchmarks). Our managed platform runs both Surya, and variants of our highest accuracy model, Chandra. Get started with $5 in free credits — sign up (takes under 30 seconds) or try our free public playground. Surya is named for the Hindu sun god, who has universal vision. The Surya code is licensed under Apache 2.0. The model weights use a…

Open weights openrail 686M parameters 262,144 tokens transformers

Model · Image and text to text

surya-ocr-2-gguf

Datalab

Surya is a 650M param OCR model with these features: - Accuracy - scores 83.3% on olmOCR-bench (top under 3B params) - Multilingual - scores 87.2% on an internal benchmark set of 91 languages (more here) - Layout analysis (table, image, header, etc.) with reading order - Table recognition (rows + columns) It works on a range of documents (see usage and benchmarks). Our managed platform runs both Surya, and variants of our highest accuracy model, Chandra. Get started with $5 in free credits — sign up (takes under 30 seconds) or try our free public playground. Surya is named for the Hindu sun god, who has universal vision. The Surya code is licensed under Apache 2.0. The model weights use a…

Open weights openrail 262,144 tokens transformers

Model · Object detection

surya_layout2

Datalab

A lightweight document layout detection model used by Surya. It detects layout regions (text, tables, figures, headers, captions, equations, etc.) on a page image and runs on CPU or GPU. This is the "fast" layout detector — a compact object detector that serves as a drop-in alternative to Surya's VLM-based layout model. Documentation, installation, and everything else lives in the Point the fast layout predictor at this checkpoint: Or make it the default so the CLI and library use it without an explicit path: Released under the AI Pubs OpenRAIL-M license (see LICENSE) — the same license as the surya-ocr-2 model weights.

Open weights openrail surya

This model includes the implementation of dimensional emotion classification described in Vox-Profile: A Speech Foundation Model Benchmark for Characterizing Diverse Speaker and Speech Traits (https://arxiv.org/pdf/2505.14648) The training pipeline used is also the top-performing solution (SAILER) in INTERSPEECH 2025—Speech Emotion Challenge (https://lab-msp.com/MSP-PodcastCompetition/IS2025/). Note that we did not use the transcript compared to our official challenge submission system, and we created a speech-only system to make the model simple but still effective. We use the MSP-Podcast data to train this model, noting that the model might be sensitive to content information when making…

Open weights openrail 1.5B parameters

Model · Audio classification

whisper-large-v3-msp-podcast-emotion

Tiantian Feng

This model includes the implementation of categorical emotion classification described in Vox-Profile: A Speech Foundation Model Benchmark for Characterizing Diverse Speaker and Speech Traits (https://arxiv.org/pdf/2505.14648) The training pipeline used is also the top-performing solution (SAILER) in INTERSPEECH 2025—Speech Emotion Challenge (https://lab-msp.com/MSP-PodcastCompetition/IS2025/). Note that we did not use all the augmentation and did not use the transcript compared to our official challenge submission system, but we created a speech-only system to make the model simple but still effective. We use the MSP-Podcast data to train this model, noting that the model might be…

Open weights openrail 1.5B parameters transformers

Model · Text to image

Emma_Vaganova

Nzonzi Mambou

LoRA Flux.1-dev pour le personnage Emma Vaganova, entraînée avec le token 3mm@. Téléchargement: onglet Files and versions de ce dépôt. Utiliser 3mm@ dans le prompt (souvent en fin de phrase: Style of 3mm@). - Résolution: 896×1024 ou buckets proches (aligné sur l’entraînement multi-résolution). Les dossiers d’état d’entraînement (-state/) ne sont pas publiés ici pour l’instant: reprise Comfy = usage local uniquement. Personnage fictif inspiré de références photo; usage responsable et conforme aux conditions FLUX / OpenRAIL. Voir MODELCARD.md (steps, reprise, hyperparamètres, SHA256, limites connues).

Open weights openrail diffusers

Questions

Can I use Open RAIL License models commercially?

Yes, with conditions. Open RAIL licenses permit use, including commercial use, subject to the use-based restrictions listed in the license, which must be passed on to anyone who receives the model or a derivative.

Which Open RAIL License models are most downloaded?

By monthly downloads reported by the Hugging Face Hub: chandra-ocr-2 (2.8M); surya-ocr-2 (1.3M); surya-ocr-2-gguf (1.1M).

Other Licenses

See all