Anthropic

Claude Sonnet 4 20250514

Name: Claude Sonnet 4 20250514
Brand: Anthropic
Price: 3 USD
Availability: InStock

Going away: May 14, 2026

Claude Sonnet 4 20250514 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 20250514 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-4-20250514-a",
          "model_id": "anthropic/claude-sonnet-4-20250514"
        },
        "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-4-20250514-a",
                        "model_id": "anthropic/claude-sonnet-4-20250514"
                    },
                    "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-4-20250514-a",
              model_id: "anthropic/claude-sonnet-4-20250514",
            },
            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 20250514 pricing and providers

Access Claude Sonnet 4 20250514 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

Going away: May 14, 2026

Other Anthropic models available through Inworld

Compare Claude Sonnet 4 20250514 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 4.5 20250929	200K	64K	$3.00	$15.00	+4
Claude Sonnet 4.6	1M	64K	$3.00	$15.00	+3

Start building with Claude Sonnet 4 20250514

Access Claude Sonnet 4 20250514 and every other model through Inworld Router or Realtime API. Create your free account and start routing in minutes.

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