torchao.float8

Created On: Dec 17, 2025 | Last Updated On: Dec 17, 2025

Main float8 training APIs

convert_to_float8_training

Swaps torch.nn.Linear in module with Float8Linear.

Other float8 training types

Float8LinearConfig	Configuration for converting a torch.nn.Linear module to float8 for training.
CastConfig	Configuration for maybe casting a single tensor to float8
ScalingType
ScalingGranularity	Defines the granularity of scaling strategies for casting to float8
precompute_float8_dynamic_scale_for_fsdp	Calculate scale dynamically for all float8 parameters. This should be run after the optimizer step. It performs a single all-reduce to compute the scales for all float8 weights. Example usage: model(input).sum().backward() optim.step() precompute_float8_dynamic_scale_for_fsdp(model).