keras-team/keras · error · ValueError

All entries in `input_tensors` must be KerasTensors. Receive

Error message

All entries in `input_tensors` must be KerasTensors. Received invalid values: inputs_tensors={input_tensors}

What it means

Error "All entries in `input_tensors` must be KerasTensors. Received invalid values: inputs_tensors={input_tensors}" thrown in keras-team/keras.

Source

Thrown at keras/src/models/cloning.py:385

    if not callable(clone_function):
        raise ValueError(
            "Expected `clone_function` argument to be a callable. "
            f"Received: clone_function={clone_function}"
        )

    if not isinstance(model, Functional):
        raise ValueError(
            "Expected `model` argument "
            f"to be a Functional Model instance. Received: model={model}"
        )

    if input_tensors is not None:
        if not all(
            isinstance(x, backend.KerasTensor)
            for x in tree.flatten(input_tensors)
        ):
            raise ValueError(
                "All entries in `input_tensors` must be KerasTensors. "
                f"Received invalid values: inputs_tensors={input_tensors}"
            )
        try:
            tree.assert_same_structure(input_tensors, model.input)
        except ValueError as e:
            raise ValueError(
                "`input_tensors` must have the same structure as model.input"
                f"\nReference structure: {model.input}"
                f"\nReceived structure: {input_tensors}"
            ) from e
    else:
        input_tensors = tree.map_structure(
            lambda x: Input(batch_shape=x.shape, dtype=x.dtype, name=x.name),
            model.input,
        )

    def operation_fn(layer):

View on GitHub (pinned to 7a34a03db6)

When it happens

Trigger: Thrown at keras/src/models/cloning.py:385 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of keras-team/keras@7a34a03db6 (2026-08-25). Data as JSON: /api/errors/92bfc0cb00681dd0. Report an issue: GitHub.