Nano Banana 2: Google's Best Image Generation and Editing Model Is Here

Google just shipped Nano Banana 2 — officially Gemini 3.1 Flash Image — and it’s the biggest upgrade to the Nano Banana lineup yet. The model delivers Pro-level visual intelligence at Flash-tier speed, with native 4K generation, real-time search grounding, and support for up to 5 consistent characters in a single scene.

Nano Banana 2 is available now on WaveSpeedAI for both generation and editing.

What’s New in Nano Banana 2

Pro Quality at Flash Speed

The original Nano Banana (Gemini 2.5 Flash Image) was fast and affordable but left a visible quality gap compared to Nano Banana Pro. Nano Banana 2 closes that gap. Built on Gemini 3.1 Flash, it inherits a full generation of architectural improvements — better reasoning, deeper world knowledge, and significantly sharper output.

The result: images with more vibrant lighting, richer textures, and sharper detail, generated at speeds that make it practical for high-volume production workflows.

Native 4K Output with Flexible Resolution

Nano Banana 2 supports four resolution tiers: 512px, 1K, 2K, and 4K. You can generate quick previews at low resolution and regenerate winners at 4K — all with the same model and prompt.

Supported aspect ratios include 1:1, 2:3, 3:2, 3:4, 4:3, 4:5, 5:4, 9:16, 16:9, and 21:9, covering everything from square social posts to ultrawide banners.

Search Grounding

Nano Banana 2 is the first Flash-tier model to support Google Search grounding — including Google Image Search. The model can verify facts and pull real-time visual references before generating.

This means prompts involving specific products, public figures, recent events, or trending topics produce more accurate, up-to-date results. Instead of guessing what something looks like, the model checks.

Multi-Character Consistency

Maintaining consistent characters across multiple images has been one of the hardest problems in AI image generation. Nano Banana 2 supports:

Up to 5 consistent characters in a single scene
Up to 14 objects with high fidelity in one generation
Up to 10 reference images for object consistency
Up to 4 character reference images to maintain identity

This makes it practical for storytelling, character design sheets, marketing campaigns, and any workflow where visual continuity matters.

Advanced Text Rendering

Text in AI-generated images has historically been a weak point. Nano Banana 2 handles it significantly better — generating legible, stylized text suitable for:

Infographics and data visualizations
Restaurant menus and price lists
Marketing banners with headlines and CTAs
UI mockups with realistic interface text
Diagrams with labels and annotations

Thinking Mode

For complex prompts that require spatial reasoning or multi-step composition, Nano Banana 2 uses a thinking process — generating interim compositions to test layout and logic before producing the final output. This means better results on first attempt for complicated scenes.

How It Compares

Feature	Nano Banana	Nano Banana 2	Nano Banana Pro
Architecture	Gemini 2.5 Flash	Gemini 3.1 Flash	Gemini 3 Pro
Max Resolution	~1K	4K	4K
Text Rendering	Basic	Advanced	Advanced
Search Grounding	No	Yes	Yes
Character Consistency	Limited	Up to 5	Up to 5
Reference Images	Limited	Up to 10	Up to 10
Speed	Very Fast	Fast	Moderate
Thinking Mode	No	Yes	Yes

Nano Banana 2 sits in the sweet spot: it matches most of Nano Banana Pro’s capabilities while retaining the speed and cost advantages of the Flash tier.

Using Nano Banana 2 on WaveSpeedAI

Text-to-Image

import wavespeed

output = wavespeed.run(
    "google/nano-banana-2/text-to-image",
    {"prompt": "A cozy Japanese coffee shop interior, morning light streaming through large windows, wooden counter with pour-over equipment, chalkboard menu reading 'DAILY BREW', warm earth tones, photorealistic"},
)

print(output["outputs"][0])

Image Editing

import wavespeed

output = wavespeed.run(
    "google/nano-banana-2/edit",
    {
        "prompt": "Change the background to a sunset beach scene, keep the subject and lighting direction consistent",
        "image": "https://example.com/portrait.jpg",
    },
)

print(output["outputs"][0])

When to Use Nano Banana 2

Choose Nano Banana 2 when you need:

High-quality generation at scale without Pro-tier pricing
4K output for print, e-commerce, or large displays
Accurate text rendering in generated images
Search-grounded generation for current topics and real products
Character-consistent multi-image workflows
Fast turnaround for API-driven applications

Stick with Nano Banana Pro when you need:

Absolute maximum quality for hero assets
The most complex multi-subject compositions
Ultra-high resolution (8K) output

The Full Nano Banana Lineup on WaveSpeedAI

Model	Best For
Nano Banana 2 Text-to-Image	Fast, high-quality generation with 4K and search grounding
Nano Banana 2 Edit	Image editing with advanced reasoning
Nano Banana Pro Text-to-Image	Maximum quality generation
Nano Banana Pro Text-to-Image Ultra	Ultra-high resolution output
Nano Banana Pro Edit	Professional image editing