# Gemini 3 Pro Preview API Pricing

As of October 10, 2026, Gemini 3 Pro Preview costs $2.00 per 1M input tokens and $12.00 per 1M output tokens on Google Vertex AI, with cache reads at $0.20 per 1M tokens. It has a 1,048,576-token context window and returns up to 65,535 tokens per response.

- Page: https://models.litellm.ai/models/gemini-3-pro-preview
- Lab: Google
- LiteLLM model name: `vertex_ai/gemini-3-pro-preview`
- Context window: 1,048,576 tokens
- Max output: 65,535 tokens
- Added to LiteLLM: November 2025
- Prices updated: October 10, 2026

## Pricing by provider

Token prices in USD per 1M tokens.

| Provider | Model name | Input | Output | Cache read | Per image | Per second | Context |
|---|---|---|---|---|---|---|---|
| Google Vertex AI | `vertex_ai/gemini-3-pro-preview` | $2.00 | $12.00 | $0.20 | – | – | 1M |
| Perplexity | `perplexity/google/gemini-3-pro-preview` | – | – | – | – | – | – |

## Cost examples

1,000 requests with 2,000 input and 500 output tokens each:

- Google Vertex AI: $10.00
- Google Vertex AI batch: $5.00

100 long-document requests with 100,000 input and 2,000 output tokens each:

- Google Vertex AI: $22.40

## Features

Supported: Function calling, Structured output, Image input, PDF input, Audio input, Video input, Reasoning, Prompt caching, Web search.

## Use it with LiteLLM

```python
from litellm import completion

response = completion(
    model="vertex_ai/gemini-3-pro-preview",
    messages=[{"role": "user", "content": "Hello!"}],
)
```

## FAQ

### How much does Gemini 3 Pro Preview cost?

Gemini 3 Pro Preview costs $2.00 per 1M input tokens and $12.00 per 1M output tokens on Google Vertex AI, with cache reads at $0.20 per 1M tokens. Batch requests cost $1.00 per 1M input tokens and $6.00 per 1M output tokens. Above 200K input tokens, input costs $4.00 and output costs $18.00 per 1M tokens.

### What is the context window of Gemini 3 Pro Preview?

Gemini 3 Pro Preview has a 1,048,576-token context window and returns up to 65,535 tokens per response.

### Which providers offer Gemini 3 Pro Preview?

Gemini 3 Pro Preview is available from 2 providers through LiteLLM: Google Vertex AI and Perplexity.

### How do I call Gemini 3 Pro Preview with an OpenAI-compatible API?

Use the LiteLLM Python SDK with model="vertex_ai/gemini-3-pro-preview", or add the model to the LiteLLM proxy's config.yaml and send requests to /v1/chat/completions from any OpenAI client. LiteLLM tracks the cost of every request at the prices on this page.

### What features does Gemini 3 Pro Preview support?

Gemini 3 Pro Preview supports function calling, structured output, image input, PDF input, audio input, video input, reasoning, prompt caching and web search.

### When did LiteLLM add Gemini 3 Pro Preview?

Gemini 3 Pro Preview was added to LiteLLM's model price file in November 2025.

Source: LiteLLM model price file, https://github.com/BerriAI/litellm/blob/main/model_prices_and_context_window.json