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 SchemaVisionreasoningCapability

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. By using the AI provider(s) below you acknowledge you reviewed and agree to their terms listed in the Legal section under the AI provider's name.

					Capabilities	Input modalities	Output modalities
Anthropic	1M	64K	$3.00	$15.00	+3

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	+3
Claude Opus 4 20250514	200K	32K	$15.00	$75.00	+3
Claude Opus 4.1 20250805	200K	32K	$15.00	$75.00	+3
Claude Opus 4.5 20251101	200K	64K	$5.00	$25.00	+3
Claude Opus 4.6	1M	128K	$5.00	$25.00	+3
Claude Opus 4.7	1M	128K	$5.00	$25.00	+3
Claude Sonnet 4 20250514	1M	64K	$3.00	$15.00	+3
Claude Sonnet 4.5 20250929	200K	64K	$3.00	$15.00	+4

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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