diff --git a/indico_toolkit/results/predictions/__init__.py b/indico_toolkit/results/predictions/__init__.py
index dff7d51..555cf5c 100644
--- a/indico_toolkit/results/predictions/__init__.py
+++ b/indico_toolkit/results/predictions/__init__.py
@@ -1,3 +1,4 @@
+import sys
 from typing import TYPE_CHECKING
 
 from ..normalization import normalize_prediction_dict
@@ -55,3 +56,14 @@ def from_dict(
         return Unbundling.from_dict(document, task, review, prediction)
     else:
         raise ValueError(f"unsupported task type {task.type!r}")
+
+
+# `dataclass()` doesn't (yet) provide a way to configure the generated `__replace__`
+# method on Python 3.13+. Unshadow `Prediction.__replace__` in generated subclasses.
+if sys.version_info >= (3, 13):
+    del Classification.__replace__
+    del DocumentExtraction.__replace__
+    del Extraction.__replace__
+    del FormExtraction.__replace__
+    del Summarization.__replace__
+    del Unbundling.__replace__
diff --git a/indico_toolkit/results/predictions/documentextraction.py b/indico_toolkit/results/predictions/documentextraction.py
index c942ab7..94d1f0b 100644
--- a/indico_toolkit/results/predictions/documentextraction.py
+++ b/indico_toolkit/results/predictions/documentextraction.py
@@ -1,5 +1,5 @@
-from copy import copy, deepcopy
-from dataclasses import dataclass, field, replace
+from copy import copy
+from dataclasses import dataclass, field
 from typing import TYPE_CHECKING, Any
 
 from ...etloutput import (
@@ -131,6 +131,19 @@ def table_cells(self, table_cells: "Iterable[tuple[Table, Cell]]") -> None:
                 self.tables.append(table)
                 self.cells.append(cell)
 
+    def __deepcopy__(self, memo: Any) -> "Self":
+        """
+        Supports `copy.deepcopy(prediction)` without copying immutable objects.
+        This provides a significant time and memory improvement when OCR is assigned.
+        """
+        new_instance = super().__deepcopy__(memo)
+        new_instance.groups = copy(self.groups)
+        new_instance.spans = copy(self.spans)
+        new_instance.tokens = copy(self.tokens)
+        new_instance.tables = copy(self.tables)
+        new_instance.cells = copy(self.cells)
+        return new_instance
+
     @staticmethod
     def from_dict(
         document: "Document",
@@ -190,15 +203,3 @@ def to_dict(self) -> "dict[str, Any]":
             prediction["rejected"] = True
 
         return prediction
-
-    def copy(self) -> "Self":
-        return replace(
-            self,
-            groups=copy(self.groups),
-            spans=copy(self.spans),
-            tokens=copy(self.tokens),
-            tables=copy(self.tables),
-            cells=copy(self.cells),
-            confidences=copy(self.confidences),
-            extras=deepcopy(self.extras),
-        )
diff --git a/indico_toolkit/results/predictions/prediction.py b/indico_toolkit/results/predictions/prediction.py
index 6edf03c..87db94f 100644
--- a/indico_toolkit/results/predictions/prediction.py
+++ b/indico_toolkit/results/predictions/prediction.py
@@ -1,5 +1,5 @@
 from copy import copy, deepcopy
-from dataclasses import dataclass, replace
+from dataclasses import dataclass
 from typing import TYPE_CHECKING, Any
 
 if TYPE_CHECKING:
@@ -28,15 +28,44 @@ def confidence(self) -> float:
     def confidence(self, value: float) -> None:
         self.confidences[self.label] = value
 
+    def __deepcopy__(self, memo: Any) -> "Self":
+        """
+        Supports `copy.deepcopy(prediction)` without copying immutable objects.
+        """
+        new_instance = copy(self)
+        new_instance.confidences = copy(self.confidences)
+        new_instance.extras = deepcopy(self.extras, memo)
+        return new_instance
+
+    def __replace__override__(self, **attributes: Any) -> "Self":
+        """
+        Supports `copy.replace(prediction, **attrs)` on Python 3.13+
+
+        Unlike `dataclasses.replace(**attrs)` this performs a deep copy and allows
+        assigning properties in addition to attributes.
+
+        E.g.
+        >>> dataclasses.replace(prediction, confidence=1.0)
+        Shallow copy and raises TypeError(...)
+        >>> copy.replace(prediction, confidence=1.0)
+        Deep copy and returns Prediction(confidence=1.0, ...)
+        """
+        new_instance = deepcopy(self)
+
+        for attribute, value in attributes.items():
+            setattr(new_instance, attribute, value)
+
+        return new_instance
+
     def to_dict(self) -> "dict[str, Any]":
         """
         Create a prediction dictionary for auto review changes.
         """
         raise NotImplementedError()
 
-    def copy(self) -> "Self":
-        return replace(
-            self,
-            confidences=copy(self.confidences),
-            extras=deepcopy(self.extras),
-        )
+
+# `dataclass()` doesn't (yet) provide a way to override the generated `__replace__`
+# method on Python 3.13+. It must be overridden after class generation and unshadowed
+# on all derived classes.
+Prediction.__replace__ = Prediction.__replace__override__  # type:ignore
+del Prediction.__replace__override__
diff --git a/indico_toolkit/results/predictions/summarization.py b/indico_toolkit/results/predictions/summarization.py
index 6f2fa3e..fa3f677 100644
--- a/indico_toolkit/results/predictions/summarization.py
+++ b/indico_toolkit/results/predictions/summarization.py
@@ -1,4 +1,4 @@
-from copy import copy, deepcopy
+from copy import copy
 from dataclasses import dataclass, replace
 from typing import TYPE_CHECKING, Any
 
@@ -70,6 +70,14 @@ def span(self, span: "Span") -> None:
         """
         self.citation = replace(self.citation, span=span)
 
+    def __deepcopy__(self, memo: Any) -> "Self":
+        """
+        Supports `copy.deepcopy(prediction)` without copying immutable objects.
+        """
+        new_instance = super().__deepcopy__(memo)
+        new_instance.citations = copy(self.citations)
+        return new_instance
+
     @staticmethod
     def from_dict(
         document: "Document",
@@ -125,11 +133,3 @@ def to_dict(self) -> "dict[str, Any]":
             prediction["rejected"] = True
 
         return prediction
-
-    def copy(self) -> "Self":
-        return replace(
-            self,
-            citations=copy(self.citations),
-            confidences=copy(self.confidences),
-            extras=deepcopy(self.extras),
-        )
diff --git a/indico_toolkit/results/predictions/unbundling.py b/indico_toolkit/results/predictions/unbundling.py
index 7e998dd..242cad2 100644
--- a/indico_toolkit/results/predictions/unbundling.py
+++ b/indico_toolkit/results/predictions/unbundling.py
@@ -1,5 +1,5 @@
-from copy import copy, deepcopy
-from dataclasses import dataclass, replace
+from copy import copy
+from dataclasses import dataclass
 from typing import TYPE_CHECKING, Any
 
 from ...etloutput import Span
@@ -25,6 +25,14 @@ def pages(self) -> "tuple[int, ...]":
         """
         return tuple(span.page for span in self.spans)
 
+    def __deepcopy__(self, memo: Any) -> "Self":
+        """
+        Supports `copy.deepcopy(prediction)` without copying immutable objects.
+        """
+        new_instance = super().__deepcopy__(memo)
+        new_instance.spans = copy(self.spans)
+        return new_instance
+
     @staticmethod
     def from_dict(
         document: "Document",
@@ -55,11 +63,3 @@ def to_dict(self) -> "dict[str, Any]":
             "confidence": self.confidences,
             "spans": [span.to_dict() for span in self.spans],
         }
-
-    def copy(self) -> "Self":
-        return replace(
-            self,
-            spans=copy(self.spans),
-            confidences=copy(self.confidences),
-            extras=deepcopy(self.extras),
-        )
diff --git a/indico_toolkit/results/result.py b/indico_toolkit/results/result.py
index cb55259..73459ed 100644
--- a/indico_toolkit/results/result.py
+++ b/indico_toolkit/results/result.py
@@ -1,6 +1,8 @@
-from dataclasses import dataclass
+from copy import deepcopy
+from dataclasses import dataclass, replace
 from functools import partial
 from itertools import chain
+from typing import TYPE_CHECKING, Any
 
 from . import predictions as prediction
 from .document import Document
@@ -11,6 +13,9 @@
 from .task import Task
 from .utils import get
 
+if TYPE_CHECKING:
+    from typing_extensions import Self
+
 
 @dataclass(frozen=True, order=True)
 class Result:
@@ -44,6 +49,12 @@ def admin_review(self) -> "PredictionList[Prediction]":
     def final(self) -> "PredictionList[Prediction]":
         return self.predictions.where(review=self.reviews[-1] if self.reviews else None)
 
+    def __deepcopy__(self, memo: Any) -> "Self":
+        """
+        Supports `copy.deepcopy(result)` without copying immutable objects.
+        """
+        return replace(self, predictions=deepcopy(self.predictions, memo))
+
     @staticmethod
     def from_dict(result: object) -> "Result":
         """