Why Nano Banana 2 Is the Best Default

Nano Banana 2 is the most flexible model family in the current fal.ai snapshot. It is not the cheapest option and it is not positioned as the premium tier, but it has the strongest all-around control surface.

That makes it the natural default for users who want reliable image generation and editing without thinking too much about endpoint details.

What Nano Banana 2 supports

For generation, the model ID is fal-ai/nano-banana-2. The required input is prompt, and the documented optional inputs include resolution, enable_web_search, and thinking_level.

For editing, the model ID is fal-ai/nano-banana-2/edit. The required inputs are prompt and image_urls. The same advanced controls are documented for the edit flow.

The documented resolutions are:

• 0.5K
• 1K
• 2K
• 4K

The documented thinking levels are:

• minimal
• high

Why those controls matter

Resolution changes the output target and the cost profile. A quick draft does not need the same resolution as a final campaign image.

Web search is useful when the prompt needs more grounding. It can help with current references, real-world details, and prompts that depend on context beyond the user’s sentence.

Thinking level is a useful quality lever. minimal keeps the experience fast and economical. high is a better fit when the prompt has more constraints or the result needs stronger reasoning.

A sensible default request

For everyday generation, 1K is a practical default:

{
  "prompt": "An editorial fashion portrait in a rainy alley",
  "resolution": "1K"
}

For editing, the product should require at least one source image:

{
  "prompt": "Turn this room into a cozy Scandinavian interior",
  "image_urls": ["https://example.com/room.png"],
  "resolution": "1K"
}

How to explain it in the UI

Nano Banana 2 should feel like the balanced preset. It has enough controls for power users, but the defaults can remain friendly for first-time users.

A good product flow can start with 1K, web search off, and minimal thinking. Then the UI can reveal higher resolution, web search, and high thinking as intentional upgrades.

Pricing note

The pricing baseline is $0.08 / image. The product notes also map resolution and advanced-control surcharges on top of that baseline, so users should see advanced options as quality and capability upgrades, not mystery costs.

Nano Banana 2 is the right default because it gives the user room to grow. It starts simple, but it does not trap advanced workflows behind a different mental model.