How much does Google: Nano Banana 2 (Gemini 3.1 Flash Image) cost per 1M tokens?

Google: Nano Banana 2 (Gemini 3.1 Flash Image) costs $0.500 per 1M input tokens and $3.00 per 1M output tokens on the standard tier.

What is Google: Nano Banana 2 (Gemini 3.1 Flash Image)'s context window?

Google: Nano Banana 2 (Gemini 3.1 Flash Image) accepts up to 131,072 tokens in a single request, and can return up to 32,768 output tokens.

Is there a cheaper OpenRouter model than Google: Nano Banana 2 (Gemini 3.1 Flash Image)?

Yes. MythoMax 13B is $0.080 per 1M input tokens versus $0.500 for Google: Nano Banana 2 (Gemini 3.1 Flash Image), with a 8,192 token context window.

Where does this Google: Nano Banana 2 (Gemini 3.1 Flash Image) 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: Nano Banana 2 (Gemini 3.1 Flash Image) pricing

Gemini 3.1 Flash Image, a.k.a. "Nano Banana 2," is Google’s latest state of the art image generation and editing model, delivering Pro-level visual quality at Flash speed. Google: Nano Banana 2 (Gemini 3.1 Flash Image) from OpenRouter costs $0.500 per 1M input tokens and $3.00 per 1M output tokens. Context window 131,072 tokens.

API id google/gemini-3.1-flash-image · OpenRouter · source · updated 2026-09-25

We have not confirmed what kind of model this is. Its name suggests one thing and its pricing another, and we would rather say so than guess.

$0.500

Input / 1M tokens

$3.00

Output / 1M tokens

—

Cached input / 1M

131K

Context window

Google: Nano Banana 2 (Gemini 3.1 Flash Image) specifications

Provider: OpenRouter
API id: google/gemini-3.1-flash-image
Model type: unknown
Context window: 131K tokens
Max output: 33K tokens
Currency: USD
Price source: Provider API
Last checked: 2026-09-25

Gemini 3.1 Flash Image (Nano Banana 2) 🍌 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	$0.500	—	$3.00	$3.50	—
OpenRouterHostviewing	$0.500	—	$3.00	$3.50	—

What Google: Nano Banana 2 (Gemini 3.1 Flash Image) costs in practice

Estimated cost at common usage volumes
Workload	Input tokens	Output tokens	Estimated cost
Short chat turn	1,000	500	$0.0020
Document summary	50,000	2,000	$0.03
1M tokens in, 200K out	1,000,000	200,000	$1.10

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: Nano Banana 2 (Gemini 3.1 Flash Image) cost per 1M tokens?: Google: Nano Banana 2 (Gemini 3.1 Flash Image) costs $0.500 per 1M input tokens and $3.00 per 1M output tokens on the standard tier.
What is Google: Nano Banana 2 (Gemini 3.1 Flash Image)'s context window?: Google: Nano Banana 2 (Gemini 3.1 Flash Image) accepts up to 131,072 tokens in a single request, and can return up to 32,768 output tokens.
Is there a cheaper OpenRouter model than Google: Nano Banana 2 (Gemini 3.1 Flash Image)?: Yes. MythoMax 13B is $0.080 per 1M input tokens versus $0.500 for Google: Nano Banana 2 (Gemini 3.1 Flash Image), with a 8,192 token context window.
Where does this Google: Nano Banana 2 (Gemini 3.1 Flash Image) 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: Nano Banana 2 (Gemini 3.1 Flash Image) with another model →

Other OpenRouter models

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