Google Colab
Google's free cloud-hosted Jupyter environment with managed Python, GPU, and TPU runtimes.
- Stores notebooks in Drive or GitHub.
- Free tier: best-effort T4/TPU, ~12-hour sessions.
- Pro tiers buy compute units and faster GPUs.
When to use: Learners and one-off experiments needing a free GPU with zero setup.
Example: Runtime > Change runtime type > T4 GPU; import torch, train a small model.