# Google Gemini 2.5 Pro API

> Gemini 2.5 Pro is the Pro-tier thinking model of Google's Gemini 2.5 family, released as stable in June 2025 and described by Google as its most advanced model in that family. It is built for reasoning over complex problems in code, math and STEM, and for analyzing large datasets, codebases and documents using long context. It accepts audio, image, video, text and PDF input; Gemini 3.1 Pro Preview is the Pro-tier successor in the Gemini 3 series.

Source: https://www.sandbase.ai/models/google/gemini-2.5-pro
API reference: https://www.sandbase.ai/models/google/gemini-2.5-pro/docs

## Facts

- Provider: Google
- Type: Language model
- Model ID: `google/gemini-2.5-pro`
- Price: $1.25 per 1M input tokens, $10 per 1M output tokens
- Context window: 1M tokens, up to 65.5K output tokens
- Capabilities: chat, vision, audio input, reasoning, structured output, function calling
- Billing: pay per use from one SandBase balance; no provider account or subscription needed

## Call it

- Chat Completions API: `POST https://api.sandbase.ai/v1/chat/completions`

```bash
curl -X POST https://api.sandbase.ai/v1/chat/completions \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "google/gemini-2.5-pro",
  "messages": [
    {
      "role": "user",
      "content": "Hello"
    }
  ],
  "max_tokens": 2048
}'
```

## FAQ

### How do I call Google Gemini 2.5 Pro through SandBase?

Create a SandBase API key, then send requests with the model ID "google/gemini-2.5-pro" to Chat Completions API (/v1/chat/completions) at https://api.sandbase.ai. The request examples on this page show the exact payload.

### How much does Google Gemini 2.5 Pro cost?

$1.25 per 1M input tokens and $10 per 1M output tokens, billed per request from your SandBase balance. Discounts, when available, are shown in the pricing on this page.

### What is the context window of Google Gemini 2.5 Pro?

1M tokens of context, with up to 65.5K output tokens per response.

### How does Google Gemini 2.5 Pro score on benchmarks?

Google Gemini 2.5 Pro scores 16.1 on the Artificial Analysis Intelligence Index (v4.3), ranking #67 of 83 models on SandBase; Coding Index 33.3, Agentic Index 1.6. Source: Artificial Analysis, measured as Gemini 2.5 Pro.

### Which features does Google Gemini 2.5 Pro support?

Google Gemini 2.5 Pro supports vision (image input), reasoning, function calling, structured output. See Specifications above for the full list.

### Do I need a separate Google account?

No. One SandBase API key and balance gives you access to Google Gemini 2.5 Pro and the other models in the catalog; you do not need to sign up with Google separately.