diff --git a/pydantic_ai_slim/pydantic_ai/messages.py b/pydantic_ai_slim/pydantic_ai/messages.py
index 661ef089..9e23b4c5 100644
--- a/pydantic_ai_slim/pydantic_ai/messages.py
+++ b/pydantic_ai_slim/pydantic_ai/messages.py
@@ -4,6 +4,7 @@
 from collections.abc import Sequence
 from dataclasses import dataclass, field, replace
 from datetime import datetime
+from mimetypes import guess_type
 from typing import Annotated, Any, Literal, Union, cast, overload
 
 import pydantic
@@ -80,8 +81,28 @@ def media_type(self) -> ImageMediaType:
             raise ValueError(f'Unknown image file extension: {self.url}')
 
 
+@dataclass
+class DocumentUrl:
+    """The URL of the document."""
+
+    url: str
+    """The URL of the document."""
+
+    kind: Literal['document-url'] = 'document-url'
+    """Type identifier, this is available on all parts as a discriminator."""
+
+    @property
+    def media_type(self) -> str:
+        """Return the media type of the document, based on the url."""
+        type_, _ = guess_type(self.url)
+        if type_ is None:
+            raise RuntimeError(f'Unknown document file extension: {self.url}')
+        return type_
+
+
 AudioMediaType: TypeAlias = Literal['audio/wav', 'audio/mpeg']
 ImageMediaType: TypeAlias = Literal['image/jpeg', 'image/png', 'image/gif', 'image/webp']
+DocumentMediaType: TypeAlias = Literal['application/pdf', 'text/plain']
 
 
 @dataclass
@@ -91,7 +112,7 @@ class BinaryContent:
     data: bytes
     """The binary data."""
 
-    media_type: AudioMediaType | ImageMediaType | str
+    media_type: AudioMediaType | ImageMediaType | DocumentMediaType | str
     """The media type of the binary data."""
 
     kind: Literal['binary'] = 'binary'
@@ -107,6 +128,11 @@ def is_image(self) -> bool:
         """Return `True` if the media type is an image type."""
         return self.media_type.startswith('image/')
 
+    @property
+    def is_document(self) -> bool:
+        """Return `True` if the media type is a document type."""
+        return self.media_type in {'application/pdf', 'text/plain'}
+
     @property
     def audio_format(self) -> Literal['mp3', 'wav']:
         """Return the audio format given the media type."""
@@ -118,7 +144,7 @@ def audio_format(self) -> Literal['mp3', 'wav']:
             raise ValueError(f'Unknown audio media type: {self.media_type}')
 
 
-UserContent: TypeAlias = 'str | ImageUrl | AudioUrl | BinaryContent'
+UserContent: TypeAlias = 'str | ImageUrl | AudioUrl | DocumentUrl | BinaryContent'
 
 
 @dataclass
diff --git a/pydantic_ai_slim/pydantic_ai/models/anthropic.py b/pydantic_ai_slim/pydantic_ai/models/anthropic.py
index a71bddbd..928c2e77 100644
--- a/pydantic_ai_slim/pydantic_ai/models/anthropic.py
+++ b/pydantic_ai_slim/pydantic_ai/models/anthropic.py
@@ -8,6 +8,7 @@
 from json import JSONDecodeError, loads as json_loads
 from typing import Any, Literal, Union, cast, overload
 
+from anthropic.types import DocumentBlockParam
 from httpx import AsyncClient as AsyncHTTPClient
 from typing_extensions import assert_never
 
@@ -15,6 +16,7 @@
 from .._utils import guard_tool_call_id as _guard_tool_call_id
 from ..messages import (
     BinaryContent,
+    DocumentUrl,
     ImageUrl,
     ModelMessage,
     ModelRequest,
@@ -41,10 +43,12 @@
 try:
     from anthropic import NOT_GIVEN, AsyncAnthropic, AsyncStream
     from anthropic.types import (
+        Base64PDFSourceParam,
         ImageBlockParam,
         Message as AnthropicMessage,
         MessageParam,
         MetadataParam,
+        PlainTextSourceParam,
         RawContentBlockDeltaEvent,
         RawContentBlockStartEvent,
         RawContentBlockStopEvent,
@@ -322,7 +326,9 @@ async def _map_message(self, messages: list[ModelMessage]) -> tuple[str, list[Me
         return system_prompt, anthropic_messages
 
     @staticmethod
-    async def _map_user_prompt(part: UserPromptPart) -> AsyncGenerator[ImageBlockParam | TextBlockParam]:
+    async def _map_user_prompt(
+        part: UserPromptPart,
+    ) -> AsyncGenerator[ImageBlockParam | TextBlockParam | DocumentBlockParam]:
         if isinstance(part.content, str):
             yield TextBlockParam(text=part.content, type='text')
         else:
@@ -344,6 +350,25 @@ async def _map_user_prompt(part: UserPromptPart) -> AsyncGenerator[ImageBlockPar
                         source={'data': io.BytesIO(response.content), 'media_type': 'image/jpeg', 'type': 'base64'},
                         type='image',
                     )
+                elif isinstance(item, DocumentUrl):
+                    response = await cached_async_http_client().get(item.url)
+                    response.raise_for_status()
+                    if item.media_type == 'application/pdf':
+                        yield DocumentBlockParam(
+                            source=Base64PDFSourceParam(
+                                data=io.BytesIO(response.content),
+                                media_type=item.media_type,
+                                type='base64',
+                            ),
+                            type='document',
+                        )
+                    elif item.media_type == 'text/plain':
+                        yield DocumentBlockParam(
+                            source=PlainTextSourceParam(data=response.text, media_type=item.media_type, type='text'),
+                            type='document',
+                        )
+                    else:
+                        raise RuntimeError(f'Unsupported media type: {item.media_type}')
                 else:
                     raise RuntimeError(f'Unsupported content type: {type(item)}')
 
diff --git a/pydantic_ai_slim/pydantic_ai/models/gemini.py b/pydantic_ai_slim/pydantic_ai/models/gemini.py
index 5d843e08..b89c9ddc 100644
--- a/pydantic_ai_slim/pydantic_ai/models/gemini.py
+++ b/pydantic_ai_slim/pydantic_ai/models/gemini.py
@@ -19,6 +19,7 @@
 from ..messages import (
     AudioUrl,
     BinaryContent,
+    DocumentUrl,
     ImageUrl,
     ModelMessage,
     ModelRequest,
@@ -319,7 +320,7 @@ async def _map_user_prompt(part: UserPromptPart) -> list[_GeminiPartUnion]:
                 elif isinstance(item, BinaryContent):
                     base64_encoded = base64.b64encode(item.data).decode('utf-8')
                     content.append(_GeminiInlineDataPart(data=base64_encoded, mime_type=item.media_type))
-                elif isinstance(item, (AudioUrl, ImageUrl)):
+                elif isinstance(item, (AudioUrl, ImageUrl, DocumentUrl)):
                     try:
                         content.append(_GeminiFileDataData(file_uri=item.url, mime_type=item.media_type))
                     except ValueError: