What are the main differences between Google Nano Banana Pro and GPT Image 2.5 Flare?

On ImageBench V1 (192 prompts, 6 categories), Google Nano Banana Pro scores 68.8 overall with a 78.6% task pass rate, while GPT Image 2.5 Flare scores 81.5 overall with a 86.5% pass rate. The biggest difference is truthfulness: Google Nano Banana Pro passes 55.6% of those prompts vs 85.2% for GPT Image 2.5 Flare. Google Nano Banana Pro is an API model ($0.15 / image); GPT Image 2.5 Flare is an API model (token-based).

Which is better, Google Nano Banana Pro or GPT Image 2.5 Flare?

GPT Image 2.5 Flare is better overall on ImageBench V1, scoring 81.5 vs 68.8. Google Nano Banana Pro is strongest at text rendering (100%). GPT Image 2.5 Flare is strongest at text rendering (100%).

Is GPT Image 2.5 Flare better than Google Nano Banana Pro for truthfulness?

Yes — on the Truthfulness category of ImageBench V1, Google Nano Banana Pro passes 55.6% of prompts and GPT Image 2.5 Flare passes 85.2%. That is the largest per-category difference between Google Nano Banana Pro and GPT Image 2.5 Flare.

Where can I see Google Nano Banana Pro and GPT Image 2.5 Flare images side by side?

The ImageBench gallery shows Google Nano Banana Pro and GPT Image 2.5 Flare outputs for the same 192 prompts side by side, filterable by category and difficulty — the fastest way to judge them with your own eyes instead of trusting aggregate scores.

vs

192 evaluations across 6 categories

Benchmark V1 verdicts are produced by VLM judges and can contain mistakes. Treat PASS/FAIL labels as machine-assisted assessments, and inspect the images yourself. Learn more about the methodology.

Generation Details

Source-backed model context, size, cost, and request settings for this ImageBench V1 run.

fal/google/nano-banana-pro

API

Nano Banana Pro is Google DeepMind's higher-end image generation and editing model built on Gemini 3 Pro, designed for more accurate visuals, stronger reasoning, and better text rendering across Google products and APIs.

Maker: Google DeepMind
Family: Nano Banana Pro / Gemini image generation
Model Size: not disclosed
unknown
Cost: $0.15 / image
high
Run Target: fal/fal-ai/nano-banana-pro
Effective Request: aspect_ratio: 1:1 · resolution: 1K · num_images: 1 · output_format: png
Sources: Introducing Nano Banana Pro Google Cloud Nano Banana 2 and Nano Banana Pro GA Nano Banana Pro on fal

openai/gpt-image-2.5-flare

API

GPT Image 2.5 Flare is one of two API variants OpenAI released alongside ChatGPT Images 2.5 (September 2026), positioned as OpenAI's fastest model for high-quality, everyday image generation.

Maker: OpenAI
Family: GPT Image
Model Size: not disclosed
unknown
Cost: token-based
high
Run Target: openai/gpt-image-2.5-flare
Effective Request: model: gpt-image-2.5-flare · size: 1024x1024 · quality: auto
Sources: GPT Image 2.5 Flare model docs OpenAI image generation guide OpenAI API pricing