Anthropic

Claude 3 Haiku 20240307

Name: Claude 3 Haiku 20240307
Brand: Anthropic
Price: 0.25 USD
Availability: InStock

Claude 3 Haiku 20240307 is a large language model by Anthropic with support for vision, function calling, prompt caching, and structured output. It supports a 200K token context window with up to 4K tokens of output. Priced at $0.25 per million input tokens and $1.25 per million output tokens, it is one of the most cost-efficient options in its class. Access Claude 3 Haiku 20240307 through Inworld Router with OpenAI SDK compatibility, built-in failover, and intelligent routing across providers.

→Function CallingPrompt 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-3-haiku-20240307-a",
          "model_id": "anthropic/claude-3-haiku-20240307"
        },
        "weight": 33
      },
      {
        "variant": {
          "variant_id": "anthropic/claude-haiku-4-5-20251001-b",
          "model_id": "anthropic/claude-haiku-4-5-20251001"
        },
        "weight": 33
      },
      {
        "variant": {
          "variant_id": "anthropic/claude-opus-4-20250514-c",
          "model_id": "anthropic/claude-opus-4-20250514"
        },
        "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-3-haiku-20240307-a",
                        "model_id": "anthropic/claude-3-haiku-20240307"
                    },
                    "weight": 33
                },
                {
                    "variant": {
                        "variant_id": "anthropic/claude-haiku-4-5-20251001-b",
                        "model_id": "anthropic/claude-haiku-4-5-20251001"
                    },
                    "weight": 33
                },
                {
                    "variant": {
                        "variant_id": "anthropic/claude-opus-4-20250514-c",
                        "model_id": "anthropic/claude-opus-4-20250514"
                    },
                    "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-3-haiku-20240307-a",
              model_id: "anthropic/claude-3-haiku-20240307",
            },
            weight: 33,
          },
          {
            variant: {
              variant_id: "anthropic/claude-haiku-4-5-20251001-b",
              model_id: "anthropic/claude-haiku-4-5-20251001",
            },
            weight: 33,
          },
          {
            variant: {
              variant_id: "anthropic/claude-opus-4-20250514-c",
              model_id: "anthropic/claude-opus-4-20250514",
            },
            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 3 Haiku 20240307 pricing and providers

Access Claude 3 Haiku 20240307 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	200K	4.1K	$0.25	$1.25	+1

Other Anthropic models available through Inworld

Compare Claude 3 Haiku 20240307 with other Anthropic models available through Inworld Router or Realtime API.

					Capabilities
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
Claude Sonnet 4.6	1M	64K	$3.00	$15.00	+3

Start building with Claude 3 Haiku 20240307

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