diff --git a/examples/complete_cv_example.py b/examples/complete_cv_example.py
index 9fa9fceb853..b1899a8686d 100644
--- a/examples/complete_cv_example.py
+++ b/examples/complete_cv_example.py
@@ -92,7 +92,7 @@ def training_function(config, args):
     seed = int(config["seed"])
     batch_size = int(config["batch_size"])
     image_size = config["image_size"]
-    if not isinstance(image_size, (list, tuple)):
+    if not isinstance(image_size, list | tuple):
         image_size = (image_size, image_size)
 
     # Parse out whether we are saving every epoch or after a certain number of batches
diff --git a/examples/cv_example.py b/examples/cv_example.py
index f7e268ee661..5da2e08fc8e 100644
--- a/examples/cv_example.py
+++ b/examples/cv_example.py
@@ -81,7 +81,7 @@ def training_function(config, args):
     seed = int(config["seed"])
     batch_size = int(config["batch_size"])
     image_size = config["image_size"]
-    if not isinstance(image_size, (list, tuple)):
+    if not isinstance(image_size, list | tuple):
         image_size = (image_size, image_size)
 
     # Grab all the image filenames
diff --git a/examples/inference/pippy/README.md b/examples/inference/pippy/README.md
index 9bfa2741395..96683393bb3 100644
--- a/examples/inference/pippy/README.md
+++ b/examples/inference/pippy/README.md
@@ -1,6 +1,6 @@
-# Distributed inference examples with PiPPy
+# Distributed inference examples with Pipeline Parallelism
 
-This repo contains a variety of tutorials for using the [PiPPy](https://github.com/PyTorch/PiPPy) pipeline parallelism library with accelerate. You will find examples covering:
+This repo contains a variety of tutorials for using PyTorch's built-in pipeline parallelism (`torch.distributed.pipelining`) with accelerate. You will find examples covering:
 
 1. How to trace the model using `accelerate.prepare_pippy`
 2. How to specify inputs based on what the model expects (when to use `kwargs`, `args`, and such)
@@ -8,12 +8,14 @@ This repo contains a variety of tutorials for using the [PiPPy](https://github.c
 
 ## Installation
 
-This requires the `main` branch of accelerate (or a version at least 0.27.0),  `pippy` version of 0.2.0 or greater, and at least python 3.9. Please install using `pip install .` to pull from the `setup.py` in this repo, or run manually:
+This requires the `main` branch of accelerate (or a version at least 0.27.0), PyTorch 2.4.0 or later (which includes `torch.distributed.pipelining`), and at least python 3.9. Please install using `pip install .` to pull from the `setup.py` in this repo, or run manually:
 
 ```bash
-pip install 'accelerate>=0.27.0' 'torchpippy>=0.2.0'
+pip install 'accelerate>=0.27.0' 'torch>=2.4.0'
 ```
 
+Note: The `torchpippy` package has been merged into PyTorch 2.4.0+ as `torch.distributed.pipelining`. If you're using PyTorch 2.4.0 or later, no additional package installation is needed.
+
 ## Running code
 
 You can either use `torchrun` or the recommended way of `accelerate launch` (without needing to run `accelerate config`) on each script:
diff --git a/examples/inference/pippy/t5.py b/examples/inference/pippy/t5.py
index b134eb5372c..c70bfeccd15 100644
--- a/examples/inference/pippy/t5.py
+++ b/examples/inference/pippy/t5.py
@@ -24,8 +24,8 @@
 
 if version.parse(accelerate_version) > version.parse("0.33.0"):
     raise RuntimeError(
-        "Using encoder/decoder models is not supported with the `torch.pipelining` integration or accelerate>=0.34.0. "
-        "Please use a lower accelerate version and `torchpippy`, which this example uses."
+        "Using encoder/decoder models is not supported with the `torch.distributed.pipelining` integration or accelerate>=0.34.0. "
+        "Please use a lower accelerate version. Note: `torchpippy` has been merged into PyTorch 2.4.0+ as `torch.distributed.pipelining`."
     )
 
 
diff --git a/setup.py b/setup.py
index d4b498c5467..9ae0267a028 100644
--- a/setup.py
+++ b/setup.py
@@ -25,7 +25,6 @@
     "diffusers",
     "evaluate",
     "torchdata>=0.8.0",
-    "torchpippy>=0.2.0",
     "transformers",
     "scipy",
     "scikit-learn",
diff --git a/src/accelerate/accelerator.py b/src/accelerate/accelerator.py
index ce6b336bcce..bac051a0c0a 100755
--- a/src/accelerate/accelerator.py
+++ b/src/accelerate/accelerator.py
@@ -2184,9 +2184,9 @@ def _prepare_deepspeed(self, *args):
         for obj in result:
             if isinstance(obj, torch.nn.Module):
                 model = obj
-            elif isinstance(obj, (torch.optim.Optimizer, DummyOptim)):
+            elif isinstance(obj, torch.optim.Optimizer | DummyOptim):
                 optimizer = obj
-            elif (isinstance(obj, (LRScheduler, DummyScheduler))) or (
+            elif (isinstance(obj, LRScheduler | DummyScheduler)) or (
                 type(obj).__name__ in deepspeed.runtime.lr_schedules.VALID_LR_SCHEDULES
             ):
                 scheduler = obj
@@ -2405,9 +2405,9 @@ def _prepare_deepspeed(self, *args):
             for i in range(len(result)):
                 if isinstance(result[i], torch.nn.Module):
                     result[i] = engine
-                elif isinstance(result[i], (torch.optim.Optimizer, DummyOptim)):
+                elif isinstance(result[i], torch.optim.Optimizer | DummyOptim):
                     result[i] = optimizer
-                elif (isinstance(result[i], (LRScheduler, DummyScheduler))) or (
+                elif (isinstance(result[i], LRScheduler | DummyScheduler)) or (
                     type(result[i]).__name__ in deepspeed.runtime.lr_schedules.VALID_LR_SCHEDULES
                 ):
                     result[i] = scheduler
@@ -2488,7 +2488,7 @@ def _prepare_megatron_lm(self, *args):
                 model = obj
             elif isinstance(obj, (torch.optim.Optimizer)):
                 optimizer = obj
-            elif isinstance(obj, (LRScheduler, MegatronLMDummyScheduler)):
+            elif isinstance(obj, LRScheduler | MegatronLMDummyScheduler):
                 scheduler = obj
 
         if model is not None:
@@ -2757,7 +2757,7 @@ def prepare_optimizer(self, optimizer: torch.optim.Optimizer, device_placement=N
             from lomo_optim import AdaLomo, Lomo
 
             # Support multiple optimizers: https://github.com/huggingface/accelerate/pull/2695#discussion_r1589164607
-            self.has_lomo_optimizer |= isinstance(optimizer, (Lomo, AdaLomo))
+            self.has_lomo_optimizer |= isinstance(optimizer, Lomo | AdaLomo)
 
         # Ensure we can't double wrap an optimizer due to `find_batch_size`
         if getattr(optimizer, "_is_accelerate_prepared", False):
@@ -2935,7 +2935,7 @@ def unscale_gradients(self, optimizer=None):
             if optimizer is None:
                 # TODO: this unscales all optimizers where we should only unscale the one where parameters are.
                 optimizer = self._optimizers
-            elif not isinstance(optimizer, (tuple, list)):
+            elif not isinstance(optimizer, tuple | list):
                 optimizer = [optimizer]
             for opt in optimizer:
                 while isinstance(opt, AcceleratedOptimizer):
@@ -4324,7 +4324,7 @@ def lomo_backward(self, loss: torch.Tensor, learning_rate: float) -> None:
         _backward_called = False
 
         for optimizer in self._optimizers:
-            if isinstance(optimizer.optimizer, (Lomo, AdaLomo)):
+            if isinstance(optimizer.optimizer, Lomo | AdaLomo):
                 optimizer.optimizer.fused_backward(loss, learning_rate)
                 _backward_called = True
 
diff --git a/src/accelerate/commands/estimate.py b/src/accelerate/commands/estimate.py
index a1370e5a76c..d5d9250ee38 100644
--- a/src/accelerate/commands/estimate.py
+++ b/src/accelerate/commands/estimate.py
@@ -293,7 +293,7 @@ def estimate_command(args):
     data = gather_data(args)
     for row in data:
         for i, item in enumerate(row):
-            if isinstance(item, (int, float)):
+            if isinstance(item, int | float):
                 row[i] = convert_bytes(item)
             elif isinstance(item, dict):
                 training_usage = max(item.values())
diff --git a/src/accelerate/optimizer.py b/src/accelerate/optimizer.py
index c1f8faa1543..b03b06a9964 100644
--- a/src/accelerate/optimizer.py
+++ b/src/accelerate/optimizer.py
@@ -26,7 +26,7 @@
 
 
 def move_to_device(state, device):
-    if isinstance(state, (list, tuple)):
+    if isinstance(state, list | tuple):
         return honor_type(state, (move_to_device(t, device) for t in state))
     elif isinstance(state, dict):
         return type(state)({k: move_to_device(v, device) for k, v in state.items()})
@@ -156,7 +156,7 @@ def step(self, closure=None):
 
         if is_lomo_available():
             #  `step` should be a no-op for LOMO optimizers.
-            if isinstance(self.optimizer, (Lomo, AdaLomo)):
+            if isinstance(self.optimizer, Lomo | AdaLomo):
                 return
 
         if self.gradient_state.sync_gradients:
diff --git a/src/accelerate/scheduler.py b/src/accelerate/scheduler.py
index 1fa8a13f238..7eda4a5c307 100644
--- a/src/accelerate/scheduler.py
+++ b/src/accelerate/scheduler.py
@@ -46,7 +46,7 @@ class AcceleratedScheduler:
 
     def __init__(self, scheduler, optimizers, step_with_optimizer: bool = True, split_batches: bool = False):
         self.scheduler = scheduler
-        self.optimizers = optimizers if isinstance(optimizers, (list, tuple)) else [optimizers]
+        self.optimizers = optimizers if isinstance(optimizers, list | tuple) else [optimizers]
         self.split_batches = split_batches
         self.step_with_optimizer = step_with_optimizer
         self.gradient_state = GradientState()
diff --git a/src/accelerate/state.py b/src/accelerate/state.py
index 4da3c91f3c2..dfb0f86cee9 100644
--- a/src/accelerate/state.py
+++ b/src/accelerate/state.py
@@ -466,7 +466,7 @@ def split_between_processes(self, inputs: list | tuple | dict | torch.Tensor, ap
         end_index = start_index + num_samples_per_process + (1 if self.process_index < num_extras else 0)
 
         def _split_values(inputs, start_index, end_index):
-            if isinstance(inputs, (list, tuple, torch.Tensor)):
+            if isinstance(inputs, list | tuple | torch.Tensor):
                 if start_index >= len(inputs):
                     result = inputs[-1:]
                 else:
diff --git a/src/accelerate/test_utils/testing.py b/src/accelerate/test_utils/testing.py
index 92b229ff8e4..3eada295a0a 100644
--- a/src/accelerate/test_utils/testing.py
+++ b/src/accelerate/test_utils/testing.py
@@ -519,8 +519,9 @@ def require_mlflow(test_case):
 
 def require_pippy(test_case):
     """
-    Decorator marking a test that requires pippy installed. These tests are skipped when pippy isn't installed It is
-    also checked if the test is running on a Gaudi1 device which doesn't support pippy.
+    Decorator marking a test that requires PyTorch 2.4.0+ (which includes torch.distributed.pipelining).
+    These tests are skipped when PyTorch < 2.4.0. It is also checked if the test is running on a Gaudi1 device
+    which doesn't support pippy.
     """
     return unittest.skipUnless(is_pippy_available() and not is_habana_gaudi1(), "test requires pippy")(test_case)
 
@@ -687,7 +688,7 @@ def add_mocks(self, mocks: Union[mock.Mock, list[mock.Mock]]):
             mocks (`mock.Mock` or list of `mock.Mock`):
                 Mocks that should be added to the `TestCase` after `TestCase.setUpClass` has been run
         """
-        self.mocks = mocks if isinstance(mocks, (tuple, list)) else [mocks]
+        self.mocks = mocks if isinstance(mocks, tuple | list) else [mocks]
         for m in self.mocks:
             m.start()
             self.addCleanup(m.stop)
diff --git a/src/accelerate/tracking.py b/src/accelerate/tracking.py
index ecd722569fc..74188b51ffe 100644
--- a/src/accelerate/tracking.py
+++ b/src/accelerate/tracking.py
@@ -259,7 +259,7 @@ def log(self, values: dict, step: Optional[int] = None, **kwargs):
         """
         values = listify(values)
         for k, v in values.items():
-            if isinstance(v, (int, float)):
+            if isinstance(v, int | float):
                 self.writer.add_scalar(k, v, global_step=step, **kwargs)
             elif isinstance(v, str):
                 self.writer.add_text(k, v, global_step=step, **kwargs)
@@ -582,7 +582,7 @@ def log(self, values: dict, step: Optional[int] = None, **kwargs):
         if step is not None:
             self.writer.set_step(step)
         for k, v in values.items():
-            if isinstance(v, (int, float)):
+            if isinstance(v, int | float):
                 self.writer.log_metric(k, v, step=step, **kwargs)
             elif isinstance(v, str):
                 self.writer.log_other(k, v, **kwargs)
@@ -834,7 +834,7 @@ def log(self, values: dict, step: Optional[int]):
         """
         metrics = {}
         for k, v in values.items():
-            if isinstance(v, (int, float)):
+            if isinstance(v, int | float):
                 metrics[k] = v
             else:
                 logger.warning_once(
@@ -980,7 +980,7 @@ def log(self, values: dict[str, Union[int, float]], step: Optional[int] = None,
         """
         clearml_logger = self.task.get_logger()
         for k, v in values.items():
-            if not isinstance(v, (int, float)):
+            if not isinstance(v, int | float):
                 logger.warning_once(
                     "Accelerator is attempting to log a value of "
                     f'"{v}" of type {type(v)} for key "{k}" as a scalar. '
@@ -1299,7 +1299,7 @@ def filter_trackers(
     """
     loggers = []
     if log_with is not None:
-        if not isinstance(log_with, (list, tuple)):
+        if not isinstance(log_with, list | tuple):
             log_with = [log_with]
         if "all" in log_with or LoggerType.ALL in log_with:
             loggers = [o for o in log_with if issubclass(type(o), GeneralTracker)] + get_available_trackers()
diff --git a/src/accelerate/utils/dataclasses.py b/src/accelerate/utils/dataclasses.py
index b226c25d312..3db78533f35 100644
--- a/src/accelerate/utils/dataclasses.py
+++ b/src/accelerate/utils/dataclasses.py
@@ -2906,7 +2906,7 @@ def __post_init__(self):
         if not self.load_in_4bit and not self.load_in_8bit:
             raise ValueError("load_in_4bit and load_in_8bit can't be both False")
 
-        if not isinstance(self.llm_int8_threshold, (int, float)):
+        if not isinstance(self.llm_int8_threshold, int | float):
             raise ValueError("llm_int8_threshold must be a float or an int")
 
         if not isinstance(self.bnb_4bit_quant_type, str):
diff --git a/src/accelerate/utils/deepspeed.py b/src/accelerate/utils/deepspeed.py
index 22db891c63d..a56dd3a9a08 100644
--- a/src/accelerate/utils/deepspeed.py
+++ b/src/accelerate/utils/deepspeed.py
@@ -50,7 +50,7 @@ def map_pytorch_optim_to_deepspeed(optimizer):
         if is_bnb_available() and not is_adaw:
             import bitsandbytes.optim as bnb_opt
 
-            if isinstance(optimizer, (bnb_opt.AdamW, bnb_opt.AdamW32bit)):
+            if isinstance(optimizer, bnb_opt.AdamW | bnb_opt.AdamW32bit):
                 try:
                     is_adaw = optimizer.optim_bits == 32
                 except AttributeError:
@@ -70,7 +70,7 @@ def map_pytorch_optim_to_deepspeed(optimizer):
         if is_bnb_available() and not is_ada:
             import bitsandbytes.optim as bnb_opt
 
-            if isinstance(optimizer, (bnb_opt.Adagrad, bnb_opt.Adagrad32bit)):
+            if isinstance(optimizer, bnb_opt.Adagrad | bnb_opt.Adagrad32bit):
                 try:
                     is_ada = optimizer.optim_bits == 32
                 except AttributeError:
@@ -84,7 +84,7 @@ def map_pytorch_optim_to_deepspeed(optimizer):
     if is_bnb_available(min_version="0.38.0") and compare_versions("deepspeed", ">=", "0.11.0"):
         from bitsandbytes.optim import Lion, Lion32bit
 
-        if isinstance(optimizer, (Lion, Lion32bit)):
+        if isinstance(optimizer, Lion | Lion32bit):
             try:
                 is_bnb_32bits = optimizer.optim_bits == 32
             except AttributeError:
diff --git a/src/accelerate/utils/megatron_lm.py b/src/accelerate/utils/megatron_lm.py
index e3754098801..6ec4aaf4dbb 100644
--- a/src/accelerate/utils/megatron_lm.py
+++ b/src/accelerate/utils/megatron_lm.py
@@ -200,11 +200,11 @@ def set_megatron_data_args(self):
             setattr(args, key, value)
 
     def get_train_valid_test_datasets_provider(self, accelerator):
-        def train_valid_test_datasets_provider(train_val_test_num_samples):
+        def _default_train_valid_test_datasets_provider(train_val_test_num_samples):
             """Build train, valid, and test datasets."""
             args = get_args()
             dataset_args = {
-                "data_prefix": args.data_path if isinstance(args.data_path, (list, tuple)) else [args.data_path],
+                "data_prefix": args.data_path if isinstance(args.data_path, list | tuple) else [args.data_path],
                 "splits_string": args.split,
                 "train_valid_test_num_samples": train_val_test_num_samples,
                 "seed": args.seed,
@@ -257,7 +257,7 @@ def train_valid_test_datasets_provider(train_val_test_num_samples):
                 return train_valid_test_datasets_provider
         except ImportError:
             pass
-        return train_valid_test_datasets_provider
+        return _default_train_valid_test_datasets_provider
 
     def build_train_valid_test_data_iterators(self, accelerator):
         args = get_args()
diff --git a/src/accelerate/utils/modeling.py b/src/accelerate/utils/modeling.py
index 830249ffb10..f1f36d30b9b 100644
--- a/src/accelerate/utils/modeling.py
+++ b/src/accelerate/utils/modeling.py
@@ -1000,7 +1000,7 @@ def get_balanced_memory(
     # - the mean of the layer sizes
     if no_split_module_classes is None:
         no_split_module_classes = []
-    elif not isinstance(no_split_module_classes, (list, tuple)):
+    elif not isinstance(no_split_module_classes, list | tuple):
         no_split_module_classes = [no_split_module_classes]
 
     # Identify the size of the no_split_block modules
@@ -1089,7 +1089,7 @@ def _init_infer_auto_device_map(
     max_memory = get_max_memory(max_memory)
     if no_split_module_classes is None:
         no_split_module_classes = []
-    elif not isinstance(no_split_module_classes, (list, tuple)):
+    elif not isinstance(no_split_module_classes, list | tuple):
         no_split_module_classes = [no_split_module_classes]
 
     devices = list(max_memory.keys())
diff --git a/src/accelerate/utils/operations.py b/src/accelerate/utils/operations.py
index ceec9b457fe..a3c5772d7c1 100644
--- a/src/accelerate/utils/operations.py
+++ b/src/accelerate/utils/operations.py
@@ -104,7 +104,7 @@ def recursively_apply(func, data, *args, test_type=is_torch_tensor, error_on_oth
     Returns:
         The same data structure as `data` with `func` applied to every object of type `main_type`.
     """
-    if isinstance(data, (tuple, list)):
+    if isinstance(data, tuple | list):
         return honor_type(
             data,
             (
@@ -166,7 +166,7 @@ def send_to_device(tensor, device, non_blocking=False, skip_keys=None):
             return tensor.to(device, non_blocking=non_blocking)
         except TypeError:  # .to() doesn't accept non_blocking as kwarg
             return tensor.to(device)
-    elif isinstance(tensor, (tuple, list)):
+    elif isinstance(tensor, tuple | list):
         return honor_type(
             tensor, (send_to_device(t, device, non_blocking=non_blocking, skip_keys=skip_keys) for t in tensor)
         )
@@ -245,10 +245,10 @@ def find_batch_size(data):
     Returns:
         `int`: The batch size.
     """
-    if isinstance(data, (tuple, list, Mapping)) and (len(data) == 0):
+    if isinstance(data, tuple | list | Mapping) and (len(data) == 0):
         raise ValueError(f"Cannot find the batch size from empty {type(data)}.")
 
-    if isinstance(data, (tuple, list)):
+    if isinstance(data, tuple | list):
         return find_batch_size(data[0])
     elif isinstance(data, Mapping):
         for k in data.keys():
@@ -470,7 +470,7 @@ def _gpu_broadcast_one(tensor, src=0):
 
 
 def _tpu_broadcast(tensor, src=0, name="broadcast tensor"):
-    if isinstance(tensor, (list, tuple)):
+    if isinstance(tensor, list | tuple):
         return honor_type(tensor, (_tpu_broadcast(t, name=f"{name}_{i}") for i, t in enumerate(tensor)))
     elif isinstance(tensor, Mapping):
         return type(tensor)({k: _tpu_broadcast(v, name=f"{name}_{k}") for k, v in tensor.items()})
@@ -612,13 +612,13 @@ def concatenate(data, dim=0):
     Returns:
         The same data structure as `data` with all the tensors concatenated.
     """
-    if isinstance(data[0], (tuple, list)):
+    if isinstance(data[0], tuple | list):
         return honor_type(data[0], (concatenate([d[i] for d in data], dim=dim) for i in range(len(data[0]))))
     elif isinstance(data[0], Mapping):
         return type(data[0])({k: concatenate([d[k] for d in data], dim=dim) for k in data[0].keys()})
     elif isinstance(data[0], torch.Tensor):
         return torch.cat(data, dim=dim)
-    elif isinstance(data, (tuple, list)) and len(data) == 1:
+    elif isinstance(data, tuple | list) and len(data) == 1:
         return data[0]
     else:
         raise TypeError(f"Can only concatenate tensors but got {type(data[0])}")
@@ -840,7 +840,7 @@ def find_device(data):
             device = find_device(obj)
             if device is not None:
                 return device
-    elif isinstance(data, (tuple, list)):
+    elif isinstance(data, tuple | list):
         for obj in data:
             device = find_device(obj)
             if device is not None:
diff --git a/tests/test_tracking.py b/tests/test_tracking.py
index 4fee94a61f8..7406afa7c40 100644
--- a/tests/test_tracking.py
+++ b/tests/test_tracking.py
@@ -594,7 +594,7 @@ def test_swanlab(self):
                 if record is None:
                     continue
                 models_parser.parse_record(record)
-        header, project, experiment, logs, runtime, columns, scalars, medias, footer = models_parser.get_parsed()
+        header, project, experiment, logs, runtime, _columns, scalars, medias, _footer = models_parser.get_parsed()
 
         # test file header
         assert header.backup_type == "DEFAULT"