Google

Gemini 2.5 Flash

Name: Gemini 2.5 Flash
Brand: Google
Price: 0.3 USD
Availability: InStock

Gemini 2.5 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 $0.3 per million input tokens and $2.5 per million output tokens. Access Gemini 2.5 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-vertex/gemini-2.5-flash-a",
          "model_id": "google-vertex/gemini-2.5-flash"
        },
        "weight": 33
      },
      {
        "variant": {
          "variant_id": "google/gemini-2.5-flash-b",
          "model_id": "google/gemini-2.5-flash"
        },
        "weight": 33
      },
      {
        "variant": {
          "variant_id": "google-ai-studio/gemini-2.5-flash-c",
          "model_id": "google-ai-studio/gemini-2.5-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": "google-vertex/gemini-2.5-flash-a",
                        "model_id": "google-vertex/gemini-2.5-flash"
                    },
                    "weight": 33
                },
                {
                    "variant": {
                        "variant_id": "google/gemini-2.5-flash-b",
                        "model_id": "google/gemini-2.5-flash"
                    },
                    "weight": 33
                },
                {
                    "variant": {
                        "variant_id": "google-ai-studio/gemini-2.5-flash-c",
                        "model_id": "google-ai-studio/gemini-2.5-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: "google-vertex/gemini-2.5-flash-a",
              model_id: "google-vertex/gemini-2.5-flash",
            },
            weight: 33,
          },
          {
            variant: {
              variant_id: "google/gemini-2.5-flash-b",
              model_id: "google/gemini-2.5-flash",
            },
            weight: 33,
          },
          {
            variant: {
              variant_id: "google-ai-studio/gemini-2.5-flash-c",
              model_id: "google-ai-studio/gemini-2.5-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!"}]
}'

Gemini 2.5 Flash pricing and providers

Access Gemini 2.5 Flash through Inworld Router or Realtime API via 3 inference providers. Compare pricing and specs across providers below. 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
Google Vertex	1M	65.5K	$0.30	$2.50	+5
Google	1M	65.5K	$0.30	$2.50	+4
Google AI Studio	1M	65.5K	$0.30	$2.50	+5

Other Google models available through Inworld

Compare Gemini 2.5 Flash with other Google models available through Inworld Router or Realtime API.

					Capabilities
Gemini 2.5 Flash Image	32.8K	32.8K	$0.30	$2.50
Gemini 2.5 Flash Lite	1M	65.5K	$0.10	$0.40	+5
Gemini 2.5 Flash Lite Preview 09 2025	1M	65.5K	$0.10	$0.40	+5
Gemini 2.5 PRO	1M	65.5K	$1.25	$10.00	+5
Gemini 3 Flash Preview	1M	65.5K	$0.50	$3.00	+5
Gemini 3.1 Flash Image Preview	65.5K	32.8K	$0.50	$3.00	+2
Gemini 3.1 Flash Lite	1M	65.5K	$0.25	$1.50	+5
Gemini 3.1 PRO Preview	1M	65.5K	$2.00	$12.00	+5
Gemini 3.1 PRO Preview Customtools	1M	65.5K	$2.00	$12.00	+5
Gemini 3.5 Flash	1M	65.5K	$1.50	$9.00	+5
Gemma 4 26b A4b It Maas	128K	—	$0.15	$0.60	+2
Google/gemma 3 12b It	131.1K	131.1K	$0.05	$0.15	+1
Google/gemma 3 27b It	131.1K	131.1K	$0.08	$0.16	+1
Google/gemma 3 4b It	131.1K	131.1K	$0.05	$0.10
Google/gemma 4 26B A4B It	262.1K	—	$0.07	$0.34	+3
Google/gemma 4 31B It	262.1K	—	$0.13	$0.38	+3
Models/gemma 4 26b A4b It	262.1K	—	$0.07	$0.34	+2
Models/gemma 4 31b It	262.1K	—	$0.13	$0.38	+2