PyTorch vs Keras: which is better for prototyping?

Keras offers a high-level, easy-to-use interface ideal for rapid model building and prototyping, especially for beginners or quick experiments. PyTorch provides greater flexibility and finer-grained control for advanced users, though with a slightly steeper learning curve. For a clear, fast workflow, beginners and those needing instant results may benefit from Keras, while power users needing deep flexibility and customisation prefer PyTorch for prototyping.