Documentation Index
Fetch the complete documentation index at: https://mintlify.com/phpaisdk/anthropic/llms.txt
Use this file to discover all available pages before exploring further.
Anthropic natively supports image and file (document) inputs. The PHP AI SDK maps Content::image() and Content::file() to Anthropic’s image and document content block types respectively, handling the source format (URL or base64) automatically based on how the content was constructed.
Images can be attached by URL or as raw base64-encoded bytes.
URL-based image — pass a public URL string to Content::image(). The SDK sends it as an Anthropic url source, keeping the request payload small:
use AiSdk\Content;
use AiSdk\Generate;
use AiSdk\Message;
use AiSdk\Anthropic;
$result = Generate::text()
->model(Anthropic::model('claude-sonnet-4'))
->messages([
Message::user([
Content::text('What is in this image?'),
Content::image('https://example.com/photo.png'),
]),
])
->run();
base64 source:
Content::image('raw-image-bytes', mimeType: 'image/png')
document blocks. Pass the base64-encoded file data, the MIME type, an optional filename, and InputEncoding::Base64 as the encoding hint:
use AiSdk\Content;
use AiSdk\InputEncoding;
use AiSdk\Message;
$result = Generate::text()
->model(Anthropic::model('claude-sonnet-4'))
->messages([
Message::user([
Content::text('Summarise the attached report.'),
Content::file(
'JVBERi0=',
mimeType: 'application/pdf',
filename: 'report.pdf',
encoding: InputEncoding::Base64,
),
]),
])
->run();
document block with source.type = 'base64'.
The two Anthropic source shapes the SDK produces are:
URL source — used when the content was constructed from a URL string:
{
"type": "image",
"source": {
"type": "url",
"url": "https://example.com/photo.png"
}
}
{
"type": "document",
"source": {
"type": "base64",
"media_type": "application/pdf",
"data": "JVBERi0="
}
}
image and document blocks — only the top-level type field differs.
Audio input is not supported by the Anthropic provider. If you pass Content::audio() in a message, the SDK raises a CapabilityNotSupportedException before sending any request to the API:
// This throws CapabilityNotSupportedException immediately.
Generate::text()
->model(Anthropic::model('claude-sonnet-4'))
->messages([
Message::user([
Content::text('Transcribe this.'),
Content::audio('UklGRg==', mimeType: 'audio/wav', encoding: InputEncoding::Base64),
]),
])
->run();
Use Content::image('url') for public images — it avoids the overhead of base64 encoding and keeps request payloads small. Reserve base64 encoding for images that are not publicly accessible via a URL.