How much does Google: Gemini 3.1 Pro Preview cost per 1M tokens?

Google: Gemini 3.1 Pro Preview costs $2.00 per 1M input tokens and $12.00 per 1M output tokens on the standard tier. Cached input is $0.200 per 1M.

What is Google: Gemini 3.1 Pro Preview's context window?

Google: Gemini 3.1 Pro Preview accepts up to 1,048,576 tokens in a single request, and can return up to 65,536 output tokens.

Is there a cheaper OpenRouter model than Google: Gemini 3.1 Pro Preview?

Yes. OpenAI: GPT-3.5 Turbo is $0.500 per 1M input tokens versus $2.00 for Google: Gemini 3.1 Pro Preview, with a 16,385 token context window.

Where does this Google: Gemini 3.1 Pro Preview price come from?

From the OpenRouter catalogue, because OpenRouter does not publish machine-readable pricing. OpenRouter is a reseller, so its rate can differ from OpenRouter's own — verify before committing spend.

Google: Gemini 3.1 Pro Preview pricing

Gemini 3.1 Pro Preview is Google’s frontier reasoning model, delivering enhanced software engineering performance, improved agentic reliability, and more efficient token usage across complex workflows. Google: Gemini 3.1 Pro Preview from OpenRouter costs $2.00 per 1M input tokens and $12.00 per 1M output tokens. Cached input is $0.200 per 1M. Context window 1,048,576 tokens.

API id google/gemini-3.1-pro-preview · OpenRouter · source · updated 2026-09-25 · general-purpose

$2.00

Input / 1M tokens

$12.00

Output / 1M tokens

$0.200

Cached input / 1M

Context window

Google: Gemini 3.1 Pro Preview specifications

Provider: OpenRouter
API id: google/gemini-3.1-pro-preview
Model type: general-purpose
Context window: 1M tokens
Max output: 66K tokens
Currency: USD
Price source: Provider API
Last checked: 2026-09-25

Gemini 3.1 Pro Preview across providers

The same model, priced by every seller we track. Ranked by the cost of 1M input + 1M output tokens, standard tier; savings measured against buying from the vendor directly.

Provider	Input /1M	Cached /1M	Output /1M	1M in + 1M out	vs vendor
GoogleVendorCheapest	$2.00	$0.200	$12.00	$14.00	—
OpenRouterHostviewing	$2.00	$0.200	$12.00	$14.00	—

What Google: Gemini 3.1 Pro Preview costs in practice

Estimated cost at common usage volumes
Workload	Input tokens	Output tokens	Estimated cost
Short chat turn	1,000	500	$0.0080
Document summary	50,000	2,000	$0.12
1M tokens in, 200K out	1,000,000	200,000	$4.40

Estimates use the standard tier and ignore caching discounts, so real bills with repeated prompt prefixes are typically lower.

Common questions

How much does Google: Gemini 3.1 Pro Preview cost per 1M tokens?: Google: Gemini 3.1 Pro Preview costs $2.00 per 1M input tokens and $12.00 per 1M output tokens on the standard tier. Cached input is $0.200 per 1M.
What is Google: Gemini 3.1 Pro Preview's context window?: Google: Gemini 3.1 Pro Preview accepts up to 1,048,576 tokens in a single request, and can return up to 65,536 output tokens.
Is there a cheaper OpenRouter model than Google: Gemini 3.1 Pro Preview?: Yes. OpenAI: GPT-3.5 Turbo is $0.500 per 1M input tokens versus $2.00 for Google: Gemini 3.1 Pro Preview, with a 16,385 token context window.
Where does this Google: Gemini 3.1 Pro Preview price come from?: From the OpenRouter catalogue, because OpenRouter does not publish machine-readable pricing. OpenRouter is a reseller, so its rate can differ from OpenRouter's own — verify before committing spend.

Head-to-head comparisons

Compare Google: Gemini 3.1 Pro Preview with another model →

Other OpenRouter models

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