LiteLLMModels

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.

By GoogleModel ID vertex_ai/gemini-3-pro-previewPrices updated Checked
Input
$2.00 / 1M tokens
Output
$12.00 / 1M tokens
Cache read
$0.20 / 1M tokens
Context window
1,048,576 tokens
Max output
65,535 tokens
Providers
2
Added to LiteLLM
November 2025

Gemini 3 Pro Preview pricing by provider

2 listings across 2 providers. Token prices are in US dollars per 1M tokens. The highlighted row is the price quoted above.

ProviderModel name in LiteLLMInputOutputCache readBatch inBatch outContext
Google Vertex AIvertex_ai/gemini-3-pro-preview$2.00$12.00$0.20$1.00$6.001M
Perplexityperplexity/google/gemini-3-pro-preview––––––

Other Gemini 3 Pro Preview prices on Google Vertex AI

Priority input$3.60 per 1M tokens
Priority output$21.60 per 1M tokens
Input above 200K tokens$4.00 per 1M tokens
Output above 200K tokens$18.00 per 1M tokens
Cache read above 200K tokens$0.40 per 1M tokens
Web search$14.00 per 1K searches

What Gemini 3 Pro Preview costs in practice

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

Gemini 3 Pro Preview features

Input: text, image, audio, video. Output: text.

Use Gemini 3 Pro Preview with LiteLLM

Call Gemini 3 Pro Preview through the LiteLLM Python SDK, or put it behind the LiteLLM proxy and send OpenAI-format requests to /v1/chat/completions. LiteLLM tracks the cost of every request at these prices.

Python SDK
from litellm import completion

response = completion(
    model="vertex_ai/gemini-3-pro-preview",
    messages=[{"role": "user", "content": "Hello!"}],
)
Proxy config.yaml
model_list:
  - model_name: gemini-3-pro-preview
    litellm_params:
      model: vertex_ai/gemini-3-pro-preview
      vertex_project: os.environ/VERTEX_PROJECT
      vertex_location: os.environ/VERTEX_LOCATION
Call the proxy
curl http://0.0.0.0:4000/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer sk-1234" \
  -d '{
    "model": "gemini-3-pro-preview",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

Gemini 3 Pro Preview 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.

Sources

Prices come from LiteLLM's open-source model_prices_and_context_window.json, which LiteLLM uses to calculate the cost of every request. Provider pricing pages:

LiteLLM docs: Google Vertex AI, Perplexity.

Provider pages: Google Vertex AI, Perplexity.