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

Google: Nano Banana 2 (Gemini 3.1 Flash Image Preview) is a large language model from Google. It costs $0.500 per million input tokens and $3.00 per million output tokens. Its context window is 66K tokens.

ReasoningStructured outputimage input

Input / 1M tokens: $0.500
Output / 1M tokens: $3.00
Cached input / 1M: -
Context window: 66K

This model also charges $0.014 per search request

That is $14.00 per 1,000 requests, billed on top of the token prices above. On a typical 1,000-in / 500-out exchange the tokens cost $0.002, so the search fee is 7.0× the token cost. Per-token rankings elsewhere ignore this entirely.

Who serves it cheapest

1 hosts serve Nano Banana 2 (Gemini 3.1 Flash Image Preview). Same weights, same API - the price difference is pure margin and routing.

Providers serving Google: Nano Banana 2 (Gemini 3.1 Flash Image Preview), cheapest first
Provider	Input / 1M	Output / 1M	Context	Throughput	Uptime 24h
Google AI StudioCheapest	$0.500	$3.00	66K	-	100.0%

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. It combines...

Specifications

Google: Nano Banana 2 (Gemini 3.1 Flash Image Preview) specifications
Model ID	`google/gemini-3.1-flash-image-preview`
Provider	Google
Context window	66K tokens
Max output	59K tokens
Input modalities	image, text
Output modalities	image, text
Knowledge cutoff	-
Open weights	No
Released	February 26, 2026

Cheaper alternatives

Models that cost less than Nano Banana 2 (Gemini 3.1 Flash Image Preview) while keeping at least half its context window and every input modality it supports.

Seed 2.1 Turbo

$0.500 in · $2.50 out

1.1× cheaper

Sonar

$1.00 in · $1.00 out

1.1× cheaper

Kimi K2.5

$0.450 in · $2.25 out

1.3× cheaper

GLM 4.5V

$0.600 in · $1.80 out

1.3× cheaper

Gemini 3.5 Flash Lite

$0.300 in · $2.50 out

1.3× cheaper

Frequently asked

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

$0.500 per million input tokens and $3.00 per million output tokens.

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

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

Does Google: Nano Banana 2 (Gemini 3.1 Flash Image Preview) have extra fees beyond per-token pricing?

Yes. Google: Nano Banana 2 (Gemini 3.1 Flash Image Preview) charges $0.014 per search request - $14.00 per 1,000 requests - on top of $0.500 per million input tokens and $3.00 per million output tokens. On a typical 1,000-input / 500-output exchange the search fee alone is 7.0× the token cost.

Confirm against the source: Google official pricing.