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OpenAI

GPT 4.1

Name: GPT 4.1
Brand: OpenAI
Price: 2 USD
Availability: InStock

GPT 4.1 is a large language model by OpenAI with support for vision, function calling, prompt caching, and structured output. It supports a 1M token context window with up to 33K tokens of output. Priced at $2 per million input tokens and $8 per million output tokens. Access GPT 4.1 through Inworld Router with OpenAI SDK compatibility, built-in failover, and intelligent routing across providers.

→Function CallingPrompt CachingResponse SchemaVisionresponseFormatCapability

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": "openai/gpt-4.1-a",
          "model_id": "openai/gpt-4.1"
        },
        "weight": 33
      },
      {
        "variant": {
          "variant_id": "openai/gpt-4o-mini-b",
          "model_id": "openai/gpt-4o-mini"
        },
        "weight": 33
      },
      {
        "variant": {
          "variant_id": "openai/gpt-6-luna-c",
          "model_id": "openai/gpt-6-luna"
        },
        "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": "openai/gpt-4.1-a",
                        "model_id": "openai/gpt-4.1"
                    },
                    "weight": 33
                },
                {
                    "variant": {
                        "variant_id": "openai/gpt-4o-mini-b",
                        "model_id": "openai/gpt-4o-mini"
                    },
                    "weight": 33
                },
                {
                    "variant": {
                        "variant_id": "openai/gpt-6-luna-c",
                        "model_id": "openai/gpt-6-luna"
                    },
                    "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: "openai/gpt-4.1-a",
              model_id: "openai/gpt-4.1",
            },
            weight: 33,
          },
          {
            variant: {
              variant_id: "openai/gpt-4o-mini-b",
              model_id: "openai/gpt-4o-mini",
            },
            weight: 33,
          },
          {
            variant: {
              variant_id: "openai/gpt-6-luna-c",
              model_id: "openai/gpt-6-luna",
            },
            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!"}]
}'

GPT 4.1 pricing and providers

Access GPT 4.1 through OpenAI 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
OpenAI	$2.00	$8.00	$0.50	—	1M	32.8K	+2

Prices in USD per 1M tokens.

Other OpenAI models available through Inworld

Compare GPT 4.1 with other OpenAI models available through Inworld Router or Realtime API.

							Capabilities
GPT 4o Mini	$0.15	$0.60	$0.075	—	128K	16.4K	+2
GPT 6 Luna	$0.10	$0.50	$0.01	$0.125	1.1M	128K	+4
GPT 5.6 Luna	$0.20	$1.20	$0.02	$0.25	1.1M	128K	+4
GPT 6.1 Sol	$2.00	$10.00	$0.10	$2.50	1.1M	128K	+4
GPT 6 Astra	$10.00	$50.00	$1.00	$12.50	1.1M	128K	+4
GPT 6 Luna:fast	$0.20	$1.00	$0.02	$0.25	1.1M	128K	+4
GPT 6 Sol	$2.00	$10.00	$0.20	$2.50	1.1M	128K	+4
GPT 5.6 Sol	$5.00	$30.00	$0.50	$6.25	1.1M	128K	+4
GPT 5.6 Terra	$2.00	$12.00	$0.20	$2.50	1.1M	128K	+4
GPT 5.5	$5.00	$30.00	$0.50	—	1.1M	128K	+4
GPT 5.4	$2.50	$15.00	$0.25	—	1.1M	128K	+4
GPT 5.4 Mini	$0.75	$4.50	$0.075	—	400K	128K	+4
GPT 5.4 Nano	$0.20	$1.25	$0.02	—	400K	128K	+4
GPT 5.2	$1.75	$14.00	$0.175	—	400K	128K	+4
GPT 5.1	$1.25	$10.00	$0.125	—	400K	128K	+4
GPT 5 Mini	$0.25	$2.00	$0.025	—	400K	128K	+3
GPT 5 Nano	$0.05	$0.40	$0.005	—	400K	128K	+3
GPT 4o	$2.50	$10.00	$1.25	—	128K	16.4K	+2
GPT 4o 2024 08 06	$2.50	$10.00	$1.25	—	128K	16.4K	+2
GPT 4.1 Mini	$0.40	$1.60	$0.10	—	1M	32.8K	+2
GPT 4.1 Nano	$0.10	$0.40	$0.025	—	1M	32.8K	+1
GPT 4.1 Nano 2025 04 14	$0.10	$0.40	$0.025	—	1M	32.8K	+2
GPT 3.5 Turbo	$0.50	$1.50	—	—	16.4K	4.1K
GPT Image 2	$8.00	$30.00	$2.00	—	32.8K	32.8K
GPT Oss 120b	$0.037	$0.17	—	—	131.1K	131.1K	+2
GPT Oss 120b	$0.15	$0.60	$0.075	—	131.1K	32.8K	+3
GPT Oss 20b	$0.075	$0.30	$0.038	—	131.1K	32.8K	+3
GPT Oss Safeguard 20b	$0.075	$0.30	$0.038	—	131.1K	65.5K	+3