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Anthropic

Claude Haiku 5.5

Name: Claude Haiku 5.5
Brand: Anthropic
Price: 0.1 USD
Availability: InStock

Claude Haiku 5.5 is a reasoning model by Anthropic with vision, function calling, web search, 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 128K tokens of output. Priced at $0.1 per million input tokens and $0.5 per million output tokens, it is one of the most cost-efficient options in its class. Access Claude Haiku 5.5 through Inworld Router with OpenAI SDK compatibility, built-in failover, and intelligent routing across providers.

→Function CallingWeb SearchReasoningPrompt CachingResponse SchemaVisionreasoningCapabilityresponseFormatCapability

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-haiku-5-5-a",
          "model_id": "anthropic/claude-haiku-5-5"
        },
        "weight": 33
      },
      {
        "variant": {
          "variant_id": "anthropic/claude-fable-5-b",
          "model_id": "anthropic/claude-fable-5"
        },
        "weight": 33
      },
      {
        "variant": {
          "variant_id": "anthropic/claude-fable-5-1-c",
          "model_id": "anthropic/claude-fable-5-1"
        },
        "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-haiku-5-5-a",
                        "model_id": "anthropic/claude-haiku-5-5"
                    },
                    "weight": 33
                },
                {
                    "variant": {
                        "variant_id": "anthropic/claude-fable-5-b",
                        "model_id": "anthropic/claude-fable-5"
                    },
                    "weight": 33
                },
                {
                    "variant": {
                        "variant_id": "anthropic/claude-fable-5-1-c",
                        "model_id": "anthropic/claude-fable-5-1"
                    },
                    "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-haiku-5-5-a",
              model_id: "anthropic/claude-haiku-5-5",
            },
            weight: 33,
          },
          {
            variant: {
              variant_id: "anthropic/claude-fable-5-b",
              model_id: "anthropic/claude-fable-5",
            },
            weight: 33,
          },
          {
            variant: {
              variant_id: "anthropic/claude-fable-5-1-c",
              model_id: "anthropic/claude-fable-5-1",
            },
            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 Haiku 5.5 pricing and providers

Access Claude Haiku 5.5 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	$0.10	$0.50	$0.01	$0.125	1M	128K	+5

Prices in USD per 1M tokens.

Other Anthropic models available through Inworld

Compare Claude Haiku 5.5 with other Anthropic models available through Inworld Router or Realtime API.

							Capabilities
Claude Fable 5	$10.00	$50.00	$1.00	$12.50	1M	128K	+5
Claude Fable 5.1	$10.00	$50.00	$0.25	$12.50	1M	128K	+5
Claude Haiku 4.5 20251001	$1.00	$5.00	$0.10	$1.25	200K	64K	+5
Claude Opus 5	$5.00	$25.00	$0.50	$6.25	1M	128K	+5
Claude Opus 5.5	$4.00	$20.00	$0.20	$5.00	1M	128K	+5
Claude Opus 4.8	$5.00	$25.00	$0.50	$6.25	1M	128K	+5
Claude Opus 4.7	$5.00	$25.00	$0.50	$6.25	1M	128K	+5
Claude Opus 4.6	$5.00	$25.00	$0.50	$6.25	1M	128K	+5
Claude Sonnet 5	$2.00	$10.00	$0.20	$2.50	1M	128K	+5
Claude Sonnet 5.5	$2.00	$10.00	$0.20	$2.50	1M	128K	+5
Claude Sonnet 4.6	$3.00	$15.00	$0.30	$3.75	1M	64K	+5
Claude Sonnet 4.5 20250929	$3.00	$15.00	$0.30	$3.75	200K	64K	+5