Update README.md

README.md

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 # experiment_pel
 
-A simple **PyTorch checkpoint** published for reproducible experiments.  
+Pytorch model checkpoint for the [GeoGraph](https://github.com/instadeepai/GeoGraph) model.
 This repository exposes a single file `model.ckpt` (raw PyTorch/Lightning-style checkpoint). It is **not** a Transformers model; load it with `torch.load`.
 
 ## Usage