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1B-parameter models trained on Python-only datasets. In the different branches, models are trained on different versions of the Stack:
- stack v1
- stack v2 - permissive
- stack v2 - permissive and unlicensed
24 layers, a hidden-size of 2048 and 16 attention heads (multiquery). The learning-rate is set to $4\times10^{-4}$ after a warmup of $1000$ steps and follows a cosine decay to $4\times10^{-5}$ at the end of training. Trained with a batch size of 128 samples of 8192 tokens each, for $100$k iterations, such that the model sees $100$B tokens at the end of training. We use a FIM-rate of $0.5$, the same tokenizer as StarCoder (except for tokenizer ablations) and learned absolute positional embeddings.
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