DeepInfra

Stepfun Ai/Step 3.5 Flash

Name: Stepfun Ai/Step 3.5 Flash
Brand: DeepInfra
Price: 0.1 USD
Availability: InStock

Stepfun Ai/Step 3.5 Flash is a large language model by DeepInfra. Priced at $0.1 per million input tokens and $0.3 per million output tokens, it is one of the most cost-efficient options in its class. Access Stepfun Ai/Step 3.5 Flash through Inworld Router with OpenAI SDK compatibility, built-in failover, and intelligent routing across providers.

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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": "deepinfra/stepfun-ai/Step-3.5-Flash-a",
          "model_id": "deepinfra/stepfun-ai/Step-3.5-Flash"
        },
        "weight": 33
      },
      {
        "variant": {
          "variant_id": "deepinfra/stepfun-ai/Step-3.5-Flash-b",
          "model_id": "deepinfra/stepfun-ai/Step-3.5-Flash"
        },
        "weight": 33
      },
      {
        "variant": {
          "variant_id": "deepinfra/stepfun-ai/Step-3.5-Flash-c",
          "model_id": "deepinfra/stepfun-ai/Step-3.5-Flash"
        },
        "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": "deepinfra/stepfun-ai/Step-3.5-Flash-a",
                        "model_id": "deepinfra/stepfun-ai/Step-3.5-Flash"
                    },
                    "weight": 33
                },
                {
                    "variant": {
                        "variant_id": "deepinfra/stepfun-ai/Step-3.5-Flash-b",
                        "model_id": "deepinfra/stepfun-ai/Step-3.5-Flash"
                    },
                    "weight": 33
                },
                {
                    "variant": {
                        "variant_id": "deepinfra/stepfun-ai/Step-3.5-Flash-c",
                        "model_id": "deepinfra/stepfun-ai/Step-3.5-Flash"
                    },
                    "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: "deepinfra/stepfun-ai/Step-3.5-Flash-a",
              model_id: "deepinfra/stepfun-ai/Step-3.5-Flash",
            },
            weight: 33,
          },
          {
            variant: {
              variant_id: "deepinfra/stepfun-ai/Step-3.5-Flash-b",
              model_id: "deepinfra/stepfun-ai/Step-3.5-Flash",
            },
            weight: 33,
          },
          {
            variant: {
              variant_id: "deepinfra/stepfun-ai/Step-3.5-Flash-c",
              model_id: "deepinfra/stepfun-ai/Step-3.5-Flash",
            },
            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!"}]
}'

Stepfun Ai/Step 3.5 Flash pricing and providers

Access Stepfun Ai/Step 3.5 Flash through DeepInfra via Inworld Router or Realtime API.

					Capabilities	Input modalities	Output modalities
DeepInfra	—	—	$0.10	$0.30	—

Start building with Stepfun Ai/Step 3.5 Flash

Access Stepfun Ai/Step 3.5 Flash and every other model through Inworld Router or Realtime API. Create your free account and start routing in minutes.

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