anthropic

claude-sonnet-4-5-20250929

Context

N/A

Input

text, image

Output

text

Tool calling

Supported

About this model

Claude Sonnet 4.5 is Anthropic's smartest model and the flagship of the Claude 4 family, offering the best balance of intelligence, speed, and efficiency for everyday use. It excels at complex reasoning, coding, and analysis tasks.

Capabilities

text

Available through the unified API

image

Available through the unified API

Quick start

View API docs

curl https://api.oneinfer.ai/v1/chat/completions \
  -H "Authorization: Bearer $ONEINFER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "a40f171ceba14d75b2bf1749904d0965",
    "messages": [
      { "role": "user", "content": "Hello!" }
    ]
  }'

Providers

Available routing options for this model through OneInfer.

anthropic

a40f171ceba14d75b2bf1749904d0965

Available

Input

$3.000 / 1M

Output

$6.000 / 1M

Routing

OneInfer optimized

Pricing

Current OneInfer pricing for this model.

Usage	Price
Input tokens	$3.000 / 1M
Output tokens	$6.000 / 1M

Performance

Published evaluation results associated with this model.

No benchmark data is listed for this model.

API example

curl https://api.oneinfer.ai/v1/chat/completions \
  -H "Authorization: Bearer $ONEINFER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "a40f171ceba14d75b2bf1749904d0965",
    "messages": [
      { "role": "user", "content": "Hello!" }
    ]
  }'