Claude Sonnet 4.5
POST
/claude-opus-4-5/v1/chat/completions
Streaming Support
stream: true is set in the request, the API returns responses as server-sent events (SSE) with Content-Type: text/event-stream. This allows for progressive response delivery, where message deltas are sent incrementally as they are generated. Each event contains partial message content, enabling real-time display of responses in your application.text/event-streamdata: followed by JSONfinish_reason⚠️Important: Unified Media Structure
messages array share the exact same JSON structure:- The
typefield is fixed as"image_url" - The
image_urlkey name remains unchanged for all file types - Only the
urlvalue points to your specific media file
// Example for Video/Audio/PDF/Image:
{ "type": "image_url", "image_url": { "url": "https://..." } }
{ "type": "image_url", "image_url": { "url": "https://..." } }
Tools Parameter
tools parameter is an optional array that allows you to define functions the model can call. The array can contain multiple objects.Request
Body Params application/jsonRequired
Responses
Request Request Example
Shell
JavaScript
Java
Swift
curl --location --request POST 'https://api.kie.ai/claude-opus-4-5/v1/chat/completions' \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data-raw '{
"messages": [
{
"role": "user",
"content": [
{
"type": "text",
"text": "What is in this image?"
},
{
"type": "image_url",
"image_url": {
"url": "https://file.aiquickdraw.com/custom-page/akr/section-images/1759055072437dqlsclj2.png"
}
}
]
}
],
"tools": [
{
"type": "function",
"function": {
"name": "googleSearch"
}
}
],
"stream": true,
"include_thoughts": true,
"reasoning_effort": "high"
}'Response Response Example
200 - Example 1
{
"id": "chatcmpl-example-123",
"object": "chat.completion",
"created": 1677652288,
"model": "claude-opus-4-5",
"choices": [
{
"index": 0,
"message": {
"role": "assistant",
"content": "string"
},
"finish_reason": "stop"
}
],
"usage": {
"prompt_tokens": 10,
"completion_tokens": 50,
"total_tokens": 60
}
}