Categories: Articles

Which AI Image Gen Model is Better for High CTR?

GPT-4o vs Gemini 2.5 Flash –
The Data-Driven Visual Analysis
That Will Transform Your
Amazon Strategy

76% of businesses report 80%+ cost savings with AI
photography, but which model actually drives clicks?

Metrics Grid

3.2x

CTR Improvement Potential

85%

Product Fill Rule Compliance

$2.4K

Average Monthly Savings

0.3s

Click Decision Time

Test Winner: GPT-4o Image Model

Bottom Line: GPT-4o delivers 2.3x higher CTR for Amazon main images by automatically optimizing for the 85% fill rule, professional lighting, and Amazon-specific requirements that Gemini 2.5 Flash consistently misses.

1. The Amazon CTR Crisis - Why Every Click Counts

The CTR Reality Check

Most sellers lose 70% of potential sales in the first impression. Here’s
why your current images might be costing you thousands:

Poor CTR: <0.3% – Your listing is invisible to Amazon’s algorithm
Good CTR: 0.5%+ – Competitive but not optimized
Excellent CTR: 2-3% – Algorithm favors your listing

The Long-tail Impact: Keywords like “vitamin B12 3000mcg high potency energy” have 347% higher conversion rates than short tail terms like “vitamin B12,” but only if your main image immediately communicates the product’s value proposition.

2. The Scientific Test Setup

I conducted a controlled experiment using identical conditions to eliminate variables and focus purely on model performance. Here’s the exact methodology:

Test Parameters

Product: Vitamin B12 supplement (high-competition category)
Input Image: Identical RAW product photo
Prompt: "Optimize for Amazon main image, white background, professional lighting, 85% product fill"
Models Tested: GPT-4o Image Generation vs Gemini 2.5 Flash
Metrics: Amazon compliance, visual appeal, processing time, cost per image
Testing Duration: 30-day CTR tracking across 1,000+ impressions

3. GPT-4o Deep Dive Analysis

Score Banner

Result Card

🏆 GPT-4o Result: Notice the perfect 85% product fill, professional lighting, and crystal-clear white background - all Amazon compliance requirements met automatically.

Kamaljit Singh

Kamaljit Singh is the Founder and CEO of AMZ One Step and a former Amazon seller. Kamaljit has been featured in multiple Amazon podcasts, YouTube channels. He has been organizing meetups all around Canada and the US. Kamaljit has over 350,000 views on his Quora answers regarding FBA. Kamaljit also founded AMZ Meetup where he organizes conferences for Amazon sellers.