Gemini 3.1 Pro API Pricing

Gemini 3.1 Pro 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.

What Gemini 3.1 Pro costs in practice

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

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

Gemini 3.1 Pro features

• Function calling
• Structured output
• Image input
• Audio input
• Video input
• Reasoning
• Prompt caching

Use Gemini 3.1 Pro with LiteLLM

Call Gemini 3.1 Pro 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.

from litellm import completion

response = completion(
    model="deepinfra/google/gemini-3.1-pro",
    messages=[{"role": "user", "content": "Hello!"}],
)

model_list:
  - model_name: gemini-3-1-pro
    litellm_params:
      model: deepinfra/google/gemini-3.1-pro
      api_key: os.environ/DEEPINFRA_API_KEY

curl http://0.0.0.0:4000/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer sk-1234" \
  -d '{
    "model": "gemini-3-1-pro",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

Gemini 3.1 Pro FAQ

More Google models

• Gemini 3.8 Flash Cyber$1.50 / $7.50 per 1M tokens
• Gemini 3 Flash Preview Search$0.50 / $3 per 1M tokens
• Gemini 3.8 Flash$0.75 / $3.75 per 1M tokens
• Gemini 3 Flash$0.625 / $3.75 per 1M tokens
• Gemini 3.7 Flash$0.75 / $3.75 per 1M tokens
• Gemini 3.5 Flash Lite$0.30 / $2.50 per 1M tokens
• Gemini 3.6 Flash$0.75 / $3.75 per 1M tokens
• Gemini 3.1 Flash Lite$0.25 / $1.50 per 1M tokens