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Google

Gemini 3.5 Flash

Name: Gemini 3.5 Flash
Brand: Google
Price: 1.5 USD
Availability: InStock

Gemini 3.5 Flash is a reasoning model by Google 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 66K tokens of output. Priced at $1.5 per million input tokens and $9 per million output tokens. Access Gemini 3.5 Flash 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": "google-ai-studio/gemini-3.5-flash-a",
          "model_id": "google-ai-studio/gemini-3.5-flash"
        },
        "weight": 33
      },
      {
        "variant": {
          "variant_id": "inworld/models/gemma-4-31b-it-b",
          "model_id": "inworld/models/gemma-4-31b-it"
        },
        "weight": 33
      },
      {
        "variant": {
          "variant_id": "inworld/models/gemma-4-26b-a4b-it-c",
          "model_id": "inworld/models/gemma-4-26b-a4b-it"
        },
        "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": "google-ai-studio/gemini-3.5-flash-a",
                        "model_id": "google-ai-studio/gemini-3.5-flash"
                    },
                    "weight": 33
                },
                {
                    "variant": {
                        "variant_id": "inworld/models/gemma-4-31b-it-b",
                        "model_id": "inworld/models/gemma-4-31b-it"
                    },
                    "weight": 33
                },
                {
                    "variant": {
                        "variant_id": "inworld/models/gemma-4-26b-a4b-it-c",
                        "model_id": "inworld/models/gemma-4-26b-a4b-it"
                    },
                    "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: "google-ai-studio/gemini-3.5-flash-a",
              model_id: "google-ai-studio/gemini-3.5-flash",
            },
            weight: 33,
          },
          {
            variant: {
              variant_id: "inworld/models/gemma-4-31b-it-b",
              model_id: "inworld/models/gemma-4-31b-it",
            },
            weight: 33,
          },
          {
            variant: {
              variant_id: "inworld/models/gemma-4-26b-a4b-it-c",
              model_id: "inworld/models/gemma-4-26b-a4b-it",
            },
            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!"}]
}'

Gemini 3.5 Flash pricing and providers

Access Gemini 3.5 Flash through Google AI Studio 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
Google AI Studio	$1.50	$9.00	$0.15	$1.50	1M	65.5K	+5

Prices in USD per 1M tokens.

Other Google models available through Inworld

Compare Gemini 3.5 Flash with other Google models available through Inworld Router or Realtime API.

							Capabilities
Gemma 4 31b ItPopular	$0.13	$0.38	$0.065	—	262.1K	—	+2
Gemma 4 26b A4b ItPopular	$0.07	$0.34	$0.035	—	262.1K	—	+2
Gemini 2.5 Flash Lite	$0.10	$0.40	$0.01	$0.10	1M	65.5K	+5
Gemini 3.1 Flash Lite	$0.25	$1.50	$0.025	$0.25	1M	65.5K	+5
Gemini 3.8 Flash	$0.75	$3.75	$0.075	$0.75	1M	65.5K	+5
Gemini 3.7 Flash	$0.75	$3.75	$0.075	$0.75	1M	65.5K	+5
Gemini 3.6 Flash	$0.75	$3.75	$0.075	$0.75	1M	65.5K	+5
Gemini 3.5 Flash Lite	$0.30	$2.50	$0.03	$0.30	1M	65.5K	+5
Gemini 3.1 Flash Image	$0.50	$60.00	—	—	65.5K	32.8K	+2
Gemini 3.1 Flash Lite Image	$0.25	$30.00	—	—	65.5K	65.5K
Gemini 3.1 PRO Preview	$2.00	$12.00	$0.20	$2.00	1M	65.5K	+5
Gemini 3.1 PRO Preview Customtools	$2.00	$12.00	$0.20	$2.00	1M	65.5K	+5
Gemini 3 Flash Preview	$0.50	$3.00	$0.05	$0.50	1M	65.5K	+5
Gemini 2.5 Flash	$0.30	$2.50	$0.03	$0.30	1M	65.5K	+5
Gemini 2.5 Flash Lite	$0.10	$0.40	$0.01	$0.10	1M	65.5K	+5
Gemini 2.5 PRO	$1.25	$10.00	$0.125	$1.25	1M	65.5K	+5
Gemma 4 31B It Turbo	$0.09	$0.34	$0.05	—	262.1K	—	+3