Gemini 3.1 Pro Preview API

Gemini 3.1 Pro Preview is a large language model by Google, available on the Venice API as gemini-3-1-pro-preview. Requests are anonymized, so the provider never sees your identity.Gemini 3.1 Pro is the latest evolution of Google flagship frontier model with 1M context, advancing high-precision multimodal reasoning across text, image, and code.

Gemini 3.1 Pro Preview API pricing

Model ID	Variant	Privacy	Price
`gemini-3-1-pro-preview`	Standard	Anonymized	$2.50 input /$ 15.00 output per 1M tokens

Gemini 3.1 Pro Preview specifications

Spec	Value
Provider	Google
Released	Feb 19, 2026
Privacy	Anonymized
Context window	1M tokens
Max output	32K tokens
Reasoning effort	low, medium, high

How to use the Gemini 3.1 Pro Preview API

Send requests to POST https://api.venice.ai/api/v1/chat/completions with "model": "gemini-3-1-pro-preview" and your API key.

curl https://api.venice.ai/api/v1/chat/completions \
  -H "Authorization: Bearer $VENICE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gemini-3-1-pro-preview",
    "messages": [{ "role": "user", "content": "Explain TEE attestation in two sentences." }],
    "reasoning_effort": "low"
  }'

Gemini 3.1 Pro Preview API FAQ

How much does the Gemini 3.1 Pro Preview API cost?

2.50 per 1M input tokens and

15.00 per 1M output tokens, with cached input at $0.50 per 1M. Prices are in USD and can be paid in DIEM at parity.

What is the Gemini 3.1 Pro Preview model ID?

Use gemini-3-1-pro-preview as the model parameter.

Is the Gemini 3.1 Pro Preview API private?

Gemini 3.1 Pro Preview is anonymized: Venice forwards requests to the provider without your identity, but the provider may retain prompt data, so use a private model for sensitive work.

What is the context window of Gemini 3.1 Pro Preview?

1M tokens of context, with up to 32K output tokens per response.

What does Gemini 3.1 Pro Preview support?

Gemini 3.1 Pro Preview supports function calling, structured outputs, reasoning, image input, web search and prompt caching. Reasoning effort is adjustable with reasoning_effort: low, medium and high (default low).

Which endpoint does the Gemini 3.1 Pro Preview API use?

Call POST /chat/completions. /responses (Alpha) is also supported.

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