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Google Gemini API model

Nano Banana 2 (Gemini 3.1 Flash Image Preview)

API pricing per million tokens

gemini-3-1-flash-image-preview ReasoningChecked 8h ago
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Input
$0.5
per 1M, list
Output
$3
per 1M tokens
Cached input
n/a
no batch tier listed
Context
66K
59K max output

Price history

$0.3$1$3Mar 3, 2026Output $3Input $0.5

List price since Mar 3, 2026, from Internet Archive snapshots of the OpenRouter catalog, then daily reads.

SeenModelChange
Mar 6, 2026Nano Banana 2 (Gemini 3.1 Flash Image Preview)Input $0.25 to $0.5, Output $1.5 to $3+100%

Through a gateway

Your own numbers

100M input and 20M output tokens a month: $110.00 direct.

Related models

About Nano Banana 2 (Gemini 3.1 Flash Image Preview)

Gemini 3.1 Flash Image Preview, 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.

Takes image, text in and returns image, text. First listed Mar 3, 2026. Blended price $1.13 per 1M tokens at 3 input to 1 output.

OpenRouter listing Google Gemini API pricing page
Across fru.devCompany profile7 acquisitionsPay schedule7 conferences

Questions

How much does Nano Banana 2 (Gemini 3.1 Flash Image Preview) cost?

$0.5 per million input tokens and $3 per million output tokens.

What is the context window of Nano Banana 2 (Gemini 3.1 Flash Image Preview)?

66K tokens, with up to 59K tokens of output.

Has Nano Banana 2 (Gemini 3.1 Flash Image Preview)'s price changed?

Yes. The output price went from $1.5 to $3, first seen Mar 6, 2026.

List prices from providers' pages on the date shown; your contract may differ. Logos via logo.dev; trademarks belong to their owners.

Weekly: LLM API list prices that changed, Thursday mornings.