Anthropic

Claude Sonnet 4.6

Name: Claude Sonnet 4.6
Brand: Anthropic
Price: 3 USD
Availability: InStock

Claude Sonnet 4.6 is a reasoning model by Anthropic with vision, function calling, prompt caching, structured output — designed for complex, multi-step problem solving where accuracy matters more than speed. It supports a 1M token context window with up to 64K tokens of output. Priced at $3 per million input tokens and $15 per million output tokens. Access Claude Sonnet 4.6 through Inworld Router with OpenAI SDK compatibility, built-in failover, and intelligent routing across providers.

→Function CallingReasoningPrompt CachingResponse SchemaVision

Use This Model

Step 1 — Create Router

curl --location 'https://api.inworld.ai/router/v1/routers' \
--header 'Authorization: Basic <your-api-key>' \
--header 'Content-Type: application/json' \
--data '{
  "name": "compare-frontier-models",
  "defaultRoute": {
    "route_id": "default",
    "variants": [
      {
        "variant": {
          "variant_id": "anthropic/claude-sonnet-4-6-a",
          "model_id": "anthropic/claude-sonnet-4-6"
        },
        "weight": 33
      },
      {
        "variant": {
          "variant_id": "anthropic/claude-3-haiku-20240307-b",
          "model_id": "anthropic/claude-3-haiku-20240307"
        },
        "weight": 33
      },
      {
        "variant": {
          "variant_id": "anthropic/claude-haiku-4-5-20251001-c",
          "model_id": "anthropic/claude-haiku-4-5-20251001"
        },
        "weight": 34
      }
    ]
  }
}'

import requests

response = requests.post(
    "https://api.inworld.ai/router/v1/routers",
    headers={
        "Authorization": "Basic <your-api-key>",
        "Content-Type": "application/json",
    },
    json={
        "name": "compare-frontier-models",
        "defaultRoute": {
            "route_id": "default",
            "variants": [
                {
                    "variant": {
                        "variant_id": "anthropic/claude-sonnet-4-6-a",
                        "model_id": "anthropic/claude-sonnet-4-6"
                    },
                    "weight": 33
                },
                {
                    "variant": {
                        "variant_id": "anthropic/claude-3-haiku-20240307-b",
                        "model_id": "anthropic/claude-3-haiku-20240307"
                    },
                    "weight": 33
                },
                {
                    "variant": {
                        "variant_id": "anthropic/claude-haiku-4-5-20251001-c",
                        "model_id": "anthropic/claude-haiku-4-5-20251001"
                    },
                    "weight": 34
                }
            ]
        }
    },
)
print(response.json())

const response = await fetch(
  "https://api.inworld.ai/router/v1/routers",
  {
    method: "POST",
    headers: {
      Authorization: "Basic <your-api-key>",
      "Content-Type": "application/json",
    },
    body: JSON.stringify({
      name: "compare-frontier-models",
      defaultRoute: {
        route_id: "default",
        variants: [
          {
            variant: {
              variant_id: "anthropic/claude-sonnet-4-6-a",
              model_id: "anthropic/claude-sonnet-4-6",
            },
            weight: 33,
          },
          {
            variant: {
              variant_id: "anthropic/claude-3-haiku-20240307-b",
              model_id: "anthropic/claude-3-haiku-20240307",
            },
            weight: 33,
          },
          {
            variant: {
              variant_id: "anthropic/claude-haiku-4-5-20251001-c",
              model_id: "anthropic/claude-haiku-4-5-20251001",
            },
            weight: 34,
          },
        ],
      },
    }),
  }
);
const data = await response.json();
console.log(data);

Step 2 — Chat Completion

curl --location 'https://api.inworld.ai/v1/chat/completions' \
--header 'Authorization: Basic <your-api-key>' \
--header 'Content-Type: application/json' \
--data '{
  "model": "inworld/compare-frontier-models",
  "messages": [{"role": "user", "content": "Hello!"}]
}'

Claude Sonnet 4.6 pricing and providers

Access Claude Sonnet 4.6 through Anthropic via Inworld Router or Realtime API.

					Capabilities	Input modalities	Output modalities
Anthropic	1M	64K	$3.00	$15.00	+2

Other Anthropic models available through Inworld

Compare Claude Sonnet 4.6 with other Anthropic models available through Inworld Router or Realtime API.

					Capabilities
Claude 3 Haiku 20240307	200K	4.1K	$0.25	$1.25	+1
Claude Haiku 4.5 20251001	200K	64K	$1.00	$5.00	+2
Claude Opus 4 20250514	200K	32K	$15.00	$75.00	+2
Claude Opus 4.1 20250805	200K	32K	$15.00	$75.00	+2
Claude Opus 4.5 20251101	200K	64K	$5.00	$25.00	+2
Claude Opus 4.6	1M	128K	$5.00	$25.00	+2
Claude Sonnet 4 20250514	1M	64K	$3.00	$15.00	+2
Claude Sonnet 4.5 20250929	200K	64K	$3.00	$15.00	+3

Start building with Claude Sonnet 4.6

Access Claude Sonnet 4.6 and every other model through Inworld Router or Realtime API. Create your free account and start routing in minutes.

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