Add model card

This PR adds a model card for the Attractor-140M model presented in the paper [Solve the Loop: Attractor Models for Language and Reasoning](https://huggingface.co/papers/2605.12466).

The model card includes:
- Relevant metadata (`pipeline_tag` and `license`).
- Links to the paper, project page, and official GitHub repository.
- A sample usage snippet derived from the official implementation.

README.md

@@ -1,3 +1,42 @@
----
-license: mit
----
+---
+license: mit
+pipeline_tag: text-generation
+---
+
+# Solve the Loop: Attractor Models for Language and Reasoning
+
+This repository contains the Attractor-140M model presented in [Solve the Loop: Attractor Models for Language and Reasoning](https://huggingface.co/papers/2605.12466).
+
+[**Project Page**](https://attractor-models.github.io/) | [**GitHub**](https://github.com/jacobfa/Attractor) | [**Paper**](https://arxiv.org/abs/2605.12466)
+
+## Introduction
+
+Attractor Models are a family of models that use a backbone module to propose output embeddings and an attractor module to refine them by solving for a fixed point through implicit differentiation. This architecture allows training memory to remain constant relative to effective depth and enables iterations to be chosen adaptively. In language modeling, Attractor Models deliver a Pareto improvement over standard Transformers and stable looped models across sizes.
+
+## Sample Usage
+
+To use this model, you first need to install the package from the [official repository](https://github.com/jacobfa/Attractor):
+
+```bash
+pip install -e .
+```
+
+Then you can initialize the model as follows:
+
+```python
+from attractor.models.attractor import Attractor, AttractorConfig
+
+config = AttractorConfig.from_name("attractor-small-140m")
+model = config.construct_model()
+```
+
+## Citation
+
+```bibtex
+@article{feinashley2026attractor,
+  title={Solve the Loop: Attractor Models for Language and Reasoning},
+  author={Fein-Ashley, Jacob and Rashidinejad, Paria},
+  year={2026},
+  url={https://arxiv.org/abs/2605.12466}
+}
+```