Claude Sonnet 4.5 - Unifically

Claude Sonnet 4.5 is Anthropic’s balanced model offering strong performance at efficient cost for a wide range of tasks.

Model

anthropic/claude-sonnet-4-5


Provider	Anthropic
Name	Claude Sonnet 4.5

Supported Endpoints

All three API formats are supported:

Chat Completions — POST /v1/chat/completions
Responses — POST /v1/responses
Messages — POST /v1/messages

Example

curl -X POST https://api.unifically.com/v1/messages \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -d '{
    "model": "anthropic/claude-sonnet-4-5",
    "max_tokens": 1024,
    "messages": [
      {"role": "user", "content": "Review this function for potential bugs."}
    ]
  }'

Claude Opus 4.5 Claude Sonnet 5

⌘I