ComfyUI KIE API Workflow — Nano Banana Pro + Nano Banana 2 Comparison

This workflow is built for side-by-side testing of Nano Banana Pro and Nano Banana 2 inside ComfyUI using the Kie.ai API.

It is designed to make model differences easy to evaluate across prompt quality, image fidelity, and grounding behavior in a repeatable setup.

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Pricing Snapshot

Nano Banana 2
- 1K: 8 credits (~$0.04)
- 2K: 12 credits (~$0.06)
- 4K: 18 credits (~$0.09)
- Roughly 40% below official listed pricing.
Nano Banana Pro
- 1K/2K: 18 credits (~$0.09)
- 4K: 24 credits (~$0.12)

Pricing may change over time. Check the latest details at: https://kie.ai/pricing

Nano Banana Pro Image
- Generates images with Nano Banana Pro settings.
- Supports up to 8 optional reference images.
Nano Banana 2
- Generates images with Nano Banana 2 settings.
- Supports up to 14 optional reference images (including single-image and two-image setups).
- Supports optional Google web-search grounding.

System Prompt Selector
- Lets you keep reusable prompt templates.
- Combines your selected system prompt with a user prompt.
- Useful for creating consistent, full prompts quickly.

Single image test
- Quick baseline generation.
Two image test
- Compare how each model handles multi-reference guidance.
Nano Banana 2 with web search
- Demonstrates grounding-enabled prompt generation behavior.
Side-by-side model comparison
- Run similar prompts through Pro and Nano Banana 2 for direct visual comparison.

All requests are sent to Kie.ai: https://kie.ai
If a node fails or times out in ComfyUI, check account logs: https://kie.ai/logs
Logs are usually the fastest way to verify whether a generation completed successfully.

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Development is supported by Dreaming Computers: https://dreamingcomputers.com