Google: Gemini 2.5 Pro · fastrouter

Gemini 2.5 Pro is Google's premiere thinking model built for enterprise-grade applications requiring sophisticated reasoning. It delivers top performance on critical benchmarks, featuring built-in reasoning capabilities that enable it to plan and analyze before responding to complex queries. The model maintains high accuracy across STEM domains with native multimodal processing and an extensive context window. This preview release allows early access to Google's most advanced model, which excels in code development, scientific problem-solving, and multi-step logical tasks while maintaining human-aligned responses. The preview designation indicates ongoing optimization before general availability.

Base model All models on this base All models of the provider to the provider

Input, $/1M $1.25

Output, $/1M $10.00

Cache read $0.12

Cache write —

Context 1 048 576

Max output 65 535

Accepts files, images, text

Last checked 04.11.2026 12:00:14 UTC

Source provider's page

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API

OpenAI-compatible API: the official OpenAI SDKs work with this base URL. Replace YOUR_API_KEY with your key from the provider.

API base URL	`https://go.fastrouter.ai/api/v1`
Endpoint	`https://go.fastrouter.ai/api/v1/chat/completions`
Model id	`google/gemini-2.5-pro`

curl

curl https://go.fastrouter.ai/api/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "google/gemini-2.5-pro", "messages": [{"role": "user", "content": "Hello!"}], "max_tokens": 256}'

Python

import requests

r = requests.post(
    "https://go.fastrouter.ai/api/v1/chat/completions",
    headers={"Authorization": "Bearer YOUR_API_KEY"},
    json={
      "model": "google/gemini-2.5-pro",
      "messages": [
        {
          "role": "user",
          "content": "Hello!"
        }
      ],
      "max_tokens": 256
    },
)
print(r.json())

JavaScript

const r = await fetch("https://go.fastrouter.ai/api/v1/chat/completions", {
  method: "POST",
  headers: {Authorization: "Bearer YOUR_API_KEY", "Content-Type": "application/json"},
  body: JSON.stringify({
    "model": "google/gemini-2.5-pro",
    "messages": [
      {
        "role": "user",
        "content": "Hello!"
      }
    ],
    "max_tokens": 256
  }),
});
console.log(await r.json());

Request (JSON)

{
  "model": "google/gemini-2.5-pro",
  "messages": [
    {
      "role": "user",
      "content": "Hello!"
    }
  ],
  "max_tokens": 256
}

Response (JSON)

{
  "id": "chatcmpl-...",
  "object": "chat.completion",
  "model": "google/gemini-2.5-pro",
  "choices": [
    {
      "index": 0,
      "message": {
        "role": "assistant",
        "content": "Hi! How can I help?"
      },
      "finish_reason": "stop"
    }
  ],
  "usage": {
    "prompt_tokens": 9,
    "completion_tokens": 12,
    "total_tokens": 21
  }
}

The address is taken from the provider's model list; check it against the provider's documentation.

Provider's API documentation

Source: AI Rate Card, https://airatecard.com/en/c/offer%3Afastrouter%7Cgoogle/gemini-2.5-pro, prices checked 2026-11-04; seller's page: https://fastrouter.ai/models/google/gemini-2.5-pro

Technical details

ID: offer:fastrouter|google/gemini-2.5-pro