Google: Nano Banana 2 (Gemini 3.1 Flash Image)

proprietary

Gemini 3.1 Flash Image, a.k.a.

Context
131K
Max output
33K
Input price
$0.5/1M tokens
Output price
$3/1M tokens

Capabilities

Reasoning & Interaction
Reasoning
Tool Calling
Output Control
Structured Output
JSON Mode
Infrastructure
Streaming
Batch Processing

Details

Model IDgoogle/gemini-3.1-flash-image
Provider OpenRouter
Creator Google AI
Familygemini-3.1
Licenseproprietary
Statusactive
Typechat
Input modalitiesimage, text
Output modalitiesimage, text
Open weightNo
Parameters—
Architecture—
Context window131K tokens
Max input—
Max output33K tokens
Reasoning tokens—
Knowledge cutoff
Release date
Sourceofficial

Pricing

Input
$0.5
Output
$3
Cache write
—
Cache read
—
Batch in
—
Batch out
—

Family Comparison: gemini-3.1

ModelContextMax outPricing
Google: Gemini 3.1 Flash Lite (batch)1.0M66K$0.13$0.75
Google: Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image)66K59K$0.25$1.5
Google: Gemini 3.1 Flash Lite Preview1.0M66K$0.25$1.5
Google: Gemini 3.1 Flash Lite1.0M66K$0.25$1.5
Google: Nano Banana 2 (Gemini 3.1 Flash Image Preview)66K59K$0.5$3
Google: Nano Banana 2 (Gemini 3.1 Flash Image)131K33K$0.5$3
Google: Gemini 3.1 Pro Preview (batch)1.0M66K$1$6
Google: Gemini 3.1 Pro Preview Custom Tools1.0M66K$2$12
Google: Gemini 3.1 Pro Preview1.0M66K$2$12

API

GET/v1/models/openrouter/google/gemini-3.1-flash-image

Google: Nano Banana 2 (Gemini 3.1 Flash Image)

google/gemini-3.1-flash-image

Gemini 3.1 Flash Image, a.k.a.

Changes · 3 entries
google/gemini-3.1-flash-imagecreateca7a400Nov 2, 2026, 03:02 AM
google/gemini-3.1-flash-imageupdate88d97e5Jun 30, 2026, 04:49 AM
max_output_tokens65536→32768
google/gemini-3.1-flash-imagecreateab879c8Jun 18, 2026, 08:32 AM