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[Quantization] Deprecate Quanto #13180

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[Quantization] Deprecate Quanto #13180

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DN6 Feb 24, 2026
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DN6 Feb 24, 2026
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4 changes: 3 additions & 1 deletion src/diffusers/quantizers/quantization_config.py
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Original file line number Diff line number Diff line change
Expand Up @@ -36,7 +36,7 @@

from packaging import version

from ..utils import is_torch_available, is_torchao_available, is_torchao_version, logging
from ..utils import deprecate, is_torch_available, is_torchao_available, is_torchao_version, logging


if is_torch_available():
Expand Down Expand Up @@ -844,6 +844,8 @@ def __init__(
modules_to_not_convert: list[str] | None = None,
**kwargs,
):
deprecation_message = "`QuantoConfig` is deprecated and will be removed in version 1.0.0."
deprecate("QuantoConfig", "1.0.0", deprecation_message)
self.quant_method = QuantizationMethod.QUANTO
self.weights_dtype = weights_dtype
self.modules_to_not_convert = modules_to_not_convert
Expand Down
4 changes: 4 additions & 0 deletions src/diffusers/quantizers/quanto/quanto_quantizer.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@
from diffusers.utils.import_utils import is_optimum_quanto_version

from ...utils import (
deprecate,
get_module_from_name,
is_accelerate_available,
is_accelerate_version,
Expand Down Expand Up @@ -42,6 +43,9 @@ def __init__(self, quantization_config, **kwargs):
super().__init__(quantization_config, **kwargs)

def validate_environment(self, *args, **kwargs):
deprecation_message = "The Quanto quantizer is deprecated and will be removed in version 1.0.0."
deprecate("QuantoQuantizer", "1.0.0", deprecation_message)

if not is_optimum_quanto_available():
raise ImportError(
"Loading an optimum-quanto quantized model requires optimum-quanto library (`pip install optimum-quanto`)"
Expand Down
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