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DeepSeek

Deepseek V4 Flash 0731

Name: Deepseek V4 Flash 0731
Brand: DeepSeek
Price: 0.1 USD
Availability: InStock

Deepseek V4 Flash 0731 is a reasoning model by DeepSeek with function calling, structured output — designed for complex, multi-step problem solving where accuracy matters more than speed. It supports a 131K token context window with up to 131K tokens of output. Priced at $0.1 per million input tokens and $0.2 per million output tokens, it is one of the most cost-efficient options in its class. Access Deepseek V4 Flash 0731 through Inworld Router with OpenAI SDK compatibility, built-in failover, and intelligent routing across providers.

→Function CallingReasoningResponse SchemareasoningCapabilityresponseFormatCapability

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": "inworld/models/deepseek-v4-flash-0731-a",
          "model_id": "inworld/models/deepseek-v4-flash-0731"
        },
        "weight": 33
      },
      {
        "variant": {
          "variant_id": "inworld/models/deepseek-v4.1-flash-b",
          "model_id": "inworld/models/deepseek-v4.1-flash"
        },
        "weight": 33
      },
      {
        "variant": {
          "variant_id": "inworld/models/deepseek-v3.2-c",
          "model_id": "inworld/models/deepseek-v3.2"
        },
        "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": "inworld/models/deepseek-v4-flash-0731-a",
                        "model_id": "inworld/models/deepseek-v4-flash-0731"
                    },
                    "weight": 33
                },
                {
                    "variant": {
                        "variant_id": "inworld/models/deepseek-v4.1-flash-b",
                        "model_id": "inworld/models/deepseek-v4.1-flash"
                    },
                    "weight": 33
                },
                {
                    "variant": {
                        "variant_id": "inworld/models/deepseek-v3.2-c",
                        "model_id": "inworld/models/deepseek-v3.2"
                    },
                    "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: "inworld/models/deepseek-v4-flash-0731-a",
              model_id: "inworld/models/deepseek-v4-flash-0731",
            },
            weight: 33,
          },
          {
            variant: {
              variant_id: "inworld/models/deepseek-v4.1-flash-b",
              model_id: "inworld/models/deepseek-v4.1-flash",
            },
            weight: 33,
          },
          {
            variant: {
              variant_id: "inworld/models/deepseek-v3.2-c",
              model_id: "inworld/models/deepseek-v3.2",
            },
            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!"}]
}'

Deepseek V4 Flash 0731 pricing and providers

Access Deepseek V4 Flash 0731 through Inworld 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
Inworld	$0.10	$0.20	$0.02	—	131.1K	131.1K	+2

Prices in USD per 1M tokens.

Other DeepSeek models available through Inworld

Compare Deepseek V4 Flash 0731 with other DeepSeek models available through Inworld Router or Realtime API.

							Capabilities
Deepseek V4.1 FlashPopular	$0.30	$1.20	$0.006	—	131.1K	131.1K	+2
Deepseek V3.2	$0.26	$0.38	$0.13	—	163.8K	—
Deepseek V4 Flash	$0.10	$0.20	$0.02	—	131.1K	131.1K	+2
Deepseek V4 PRO 0813	$1.32	$3.96	$0.044	—	1M	131.1K	+1
Deepseek V4 PRO	$1.30	$2.60	$0.10	—	1M	131.1K	+1
Deepseek V4.1 Flash:free	—	—	—	—	65.5K	8.2K	+2
Deepseek V4 Flash 0731:free	—	—	—	—	65.5K	8.2K	+2