diff --git a/libs/core/langchain_core/utils/pydantic.py b/libs/core/langchain_core/utils/pydantic.py
index dd6b9aba597..fb4a72a29c7 100644
--- a/libs/core/langchain_core/utils/pydantic.py
+++ b/libs/core/langchain_core/utils/pydantic.py
@@ -200,6 +200,8 @@ def v1_repr(obj: BaseModel) -> str:
         if isinstance(value, BaseModel):
             repr_.append(f"{name}={v1_repr(value)}")
         else:
+            if field.exclude:
+                continue
             if not field.is_required():
                 if not value:
                     continue
diff --git a/libs/core/tests/unit_tests/prompts/__snapshots__/test_chat.ambr b/libs/core/tests/unit_tests/prompts/__snapshots__/test_chat.ambr
index 3d9d2461646..29ab354d126 100644
--- a/libs/core/tests/unit_tests/prompts/__snapshots__/test_chat.ambr
+++ b/libs/core/tests/unit_tests/prompts/__snapshots__/test_chat.ambr
@@ -167,7 +167,7 @@
             'default': list([
             ]),
             'items': dict({
-              '$ref': '#/definitions/InvalidToolCall',
+              '$ref': '#/$defs/InvalidToolCall',
             }),
             'title': 'Invalid Tool Calls',
             'type': 'array',
@@ -192,7 +192,7 @@
             'default': list([
             ]),
             'items': dict({
-              '$ref': '#/definitions/ToolCallChunk',
+              '$ref': '#/$defs/ToolCallChunk',
             }),
             'title': 'Tool Call Chunks',
             'type': 'array',
@@ -201,7 +201,7 @@
             'default': list([
             ]),
             'items': dict({
-              '$ref': '#/definitions/ToolCall',
+              '$ref': '#/$defs/ToolCall',
             }),
             'title': 'Tool Calls',
             'type': 'array',
@@ -218,7 +218,7 @@
           'usage_metadata': dict({
             'anyOf': list([
               dict({
-                '$ref': '#/definitions/UsageMetadata',
+                '$ref': '#/$defs/UsageMetadata',
               }),
               dict({
                 'type': 'null',
@@ -1224,6 +1224,7 @@
             'type': 'object',
           }),
           'artifact': dict({
+            'default': None,
             'title': 'Artifact',
           }),
           'content': dict({
@@ -1368,22 +1369,22 @@
               '$ref': '#/$defs/ToolMessage',
             }),
             dict({
-              '$ref': '#/definitions/AIMessageChunk',
+              '$ref': '#/$defs/AIMessageChunk',
             }),
             dict({
-              '$ref': '#/definitions/HumanMessageChunk',
+              '$ref': '#/$defs/HumanMessageChunk',
             }),
             dict({
-              '$ref': '#/definitions/ChatMessageChunk',
+              '$ref': '#/$defs/ChatMessageChunk',
             }),
             dict({
-              '$ref': '#/definitions/SystemMessageChunk',
+              '$ref': '#/$defs/SystemMessageChunk',
             }),
             dict({
-              '$ref': '#/definitions/FunctionMessageChunk',
+              '$ref': '#/$defs/FunctionMessageChunk',
             }),
             dict({
-              '$ref': '#/definitions/ToolMessageChunk',
+              '$ref': '#/$defs/ToolMessageChunk',
             }),
           ]),
         }),
@@ -1570,7 +1571,7 @@
             'default': list([
             ]),
             'items': dict({
-              '$ref': '#/definitions/InvalidToolCall',
+              '$ref': '#/$defs/InvalidToolCall',
             }),
             'title': 'Invalid Tool Calls',
             'type': 'array',
@@ -1595,7 +1596,7 @@
             'default': list([
             ]),
             'items': dict({
-              '$ref': '#/definitions/ToolCallChunk',
+              '$ref': '#/$defs/ToolCallChunk',
             }),
             'title': 'Tool Call Chunks',
             'type': 'array',
@@ -1604,7 +1605,7 @@
             'default': list([
             ]),
             'items': dict({
-              '$ref': '#/definitions/ToolCall',
+              '$ref': '#/$defs/ToolCall',
             }),
             'title': 'Tool Calls',
             'type': 'array',
@@ -1621,7 +1622,7 @@
           'usage_metadata': dict({
             'anyOf': list([
               dict({
-                '$ref': '#/definitions/UsageMetadata',
+                '$ref': '#/$defs/UsageMetadata',
               }),
               dict({
                 'type': 'null',
@@ -2627,6 +2628,7 @@
             'type': 'object',
           }),
           'artifact': dict({
+            'default': None,
             'title': 'Artifact',
           }),
           'content': dict({
@@ -2770,22 +2772,22 @@
               '$ref': '#/$defs/ToolMessage',
             }),
             dict({
-              '$ref': '#/definitions/AIMessageChunk',
+              '$ref': '#/$defs/AIMessageChunk',
             }),
             dict({
-              '$ref': '#/definitions/HumanMessageChunk',
+              '$ref': '#/$defs/HumanMessageChunk',
             }),
             dict({
-              '$ref': '#/definitions/ChatMessageChunk',
+              '$ref': '#/$defs/ChatMessageChunk',
             }),
             dict({
-              '$ref': '#/definitions/SystemMessageChunk',
+              '$ref': '#/$defs/SystemMessageChunk',
             }),
             dict({
-              '$ref': '#/definitions/FunctionMessageChunk',
+              '$ref': '#/$defs/FunctionMessageChunk',
             }),
             dict({
-              '$ref': '#/definitions/ToolMessageChunk',
+              '$ref': '#/$defs/ToolMessageChunk',
             }),
           ]),
         }),
diff --git a/libs/core/tests/unit_tests/runnables/__snapshots__/test_runnable.ambr b/libs/core/tests/unit_tests/runnables/__snapshots__/test_runnable.ambr
index ea1ec005fee..074fe7ddba3 100644
--- a/libs/core/tests/unit_tests/runnables/__snapshots__/test_runnable.ambr
+++ b/libs/core/tests/unit_tests/runnables/__snapshots__/test_runnable.ambr
@@ -5344,7 +5344,7 @@
             'default': list([
             ]),
             'items': dict({
-              '$ref': '#/definitions/InvalidToolCall',
+              '$ref': '#/$defs/InvalidToolCall',
             }),
             'title': 'Invalid Tool Calls',
             'type': 'array',
@@ -5369,7 +5369,7 @@
             'default': list([
             ]),
             'items': dict({
-              '$ref': '#/definitions/ToolCallChunk',
+              '$ref': '#/$defs/ToolCallChunk',
             }),
             'title': 'Tool Call Chunks',
             'type': 'array',
@@ -5378,7 +5378,7 @@
             'default': list([
             ]),
             'items': dict({
-              '$ref': '#/definitions/ToolCall',
+              '$ref': '#/$defs/ToolCall',
             }),
             'title': 'Tool Calls',
             'type': 'array',
@@ -5395,7 +5395,7 @@
           'usage_metadata': dict({
             'anyOf': list([
               dict({
-                '$ref': '#/definitions/UsageMetadata',
+                '$ref': '#/$defs/UsageMetadata',
               }),
               dict({
                 'type': 'null',
@@ -6401,6 +6401,7 @@
             'type': 'object',
           }),
           'artifact': dict({
+            'default': None,
             'title': 'Artifact',
           }),
           'content': dict({
@@ -6544,22 +6545,22 @@
               '$ref': '#/$defs/ToolMessage',
             }),
             dict({
-              '$ref': '#/definitions/AIMessageChunk',
+              '$ref': '#/$defs/AIMessageChunk',
             }),
             dict({
-              '$ref': '#/definitions/HumanMessageChunk',
+              '$ref': '#/$defs/HumanMessageChunk',
             }),
             dict({
-              '$ref': '#/definitions/ChatMessageChunk',
+              '$ref': '#/$defs/ChatMessageChunk',
             }),
             dict({
-              '$ref': '#/definitions/SystemMessageChunk',
+              '$ref': '#/$defs/SystemMessageChunk',
             }),
             dict({
-              '$ref': '#/definitions/FunctionMessageChunk',
+              '$ref': '#/$defs/FunctionMessageChunk',
             }),
             dict({
-              '$ref': '#/definitions/ToolMessageChunk',
+              '$ref': '#/$defs/ToolMessageChunk',
             }),
           ]),
         }),
@@ -6742,7 +6743,7 @@
             'default': list([
             ]),
             'items': dict({
-              '$ref': '#/definitions/InvalidToolCall',
+              '$ref': '#/$defs/InvalidToolCall',
             }),
             'title': 'Invalid Tool Calls',
             'type': 'array',
@@ -6767,7 +6768,7 @@
             'default': list([
             ]),
             'items': dict({
-              '$ref': '#/definitions/ToolCallChunk',
+              '$ref': '#/$defs/ToolCallChunk',
             }),
             'title': 'Tool Call Chunks',
             'type': 'array',
@@ -6776,7 +6777,7 @@
             'default': list([
             ]),
             'items': dict({
-              '$ref': '#/definitions/ToolCall',
+              '$ref': '#/$defs/ToolCall',
             }),
             'title': 'Tool Calls',
             'type': 'array',
@@ -6793,7 +6794,7 @@
           'usage_metadata': dict({
             'anyOf': list([
               dict({
-                '$ref': '#/definitions/UsageMetadata',
+                '$ref': '#/$defs/UsageMetadata',
               }),
               dict({
                 'type': 'null',
@@ -6992,22 +6993,22 @@
                   '$ref': '#/$defs/ToolMessage',
                 }),
                 dict({
-                  '$ref': '#/definitions/AIMessageChunk',
+                  '$ref': '#/$defs/AIMessageChunk',
                 }),
                 dict({
-                  '$ref': '#/definitions/HumanMessageChunk',
+                  '$ref': '#/$defs/HumanMessageChunk',
                 }),
                 dict({
-                  '$ref': '#/definitions/ChatMessageChunk',
+                  '$ref': '#/$defs/ChatMessageChunk',
                 }),
                 dict({
-                  '$ref': '#/definitions/SystemMessageChunk',
+                  '$ref': '#/$defs/SystemMessageChunk',
                 }),
                 dict({
-                  '$ref': '#/definitions/FunctionMessageChunk',
+                  '$ref': '#/$defs/FunctionMessageChunk',
                 }),
                 dict({
-                  '$ref': '#/definitions/ToolMessageChunk',
+                  '$ref': '#/$defs/ToolMessageChunk',
                 }),
               ]),
             }),
@@ -7888,6 +7889,7 @@
             'type': 'object',
           }),
           'artifact': dict({
+            'default': None,
             'title': 'Artifact',
           }),
           'content': dict({
diff --git a/libs/core/tests/unit_tests/utils/test_pydantic.py b/libs/core/tests/unit_tests/utils/test_pydantic.py
index c579c105b22..5bba5e81167 100644
--- a/libs/core/tests/unit_tests/utils/test_pydantic.py
+++ b/libs/core/tests/unit_tests/utils/test_pydantic.py
@@ -12,6 +12,7 @@ from langchain_core.utils.pydantic import (
     is_basemodel_instance,
     is_basemodel_subclass,
     pre_init,
+    v1_repr,
 )
 
 
@@ -194,3 +195,17 @@ def test_fields_pydantic_v1_from_2() -> None:
 
     fields = get_fields(Foo)
     assert fields == {"x": Foo.__fields__["x"]}
+
+
+def test_v1_repr() -> None:
+    from pydantic import BaseModel, Field
+
+    class Foo(BaseModel):
+        bar: int = Field(default=1, alias="baz", exclude=True)
+        x: int = Field(default=2)
+
+        def __repr__(self) -> str:
+            """Custom repr."""
+            return v1_repr(self)
+
+    assert repr(Foo(bar=2, x=3)) == "Foo(x=3)"  # type: ignore[call-arg]