Overview of Two Leading Image Models

Nano Banana Pro is Google’s high-fidelity image model known for excellent logical consistency, reference handling and multi-image workflows. On the other side, GPT Image 1.5 is OpenAI’s newest image model focused on speed, instruction precision, photorealism and text rendering — making both models strong contenders for creative and production use.

Feature Comparison

Prompt Adherence: GPT Image 1.5 follows natural-language instructions closely and produces faster turnaround on edits.
Reference Handling: Nano Banana Pro excels with multiple references and structural outputs such as correct object counts and complex scenes.
Text & Infographics: GPT Image 1.5 handles small, dense text cleanly, making it useful for graphics and design tasks.
Consistency Across Edits: Both models maintain consistency well, though Nano Banana Pro has an edge in structural logic for multi-object scenes.
Speed & Cost: GPT Image 1.5 offers faster generation and lower cost workflows, especially via API integrations.

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Prompt Scenario: Produce a Cozy Winter Cabin Scene

Below are two image results for the same prompt run on both Nano Banana Pro and GPT Image 1.5. Replace placeholders with your actual generated outputs.

Comparison Prompt – Cozy Winter Cabin

A cozy winter cabin surrounded by snow-covered pines at dusk, warm golden light glowing from the windows, soft falling snow, wood smoke in the air, ultra-detailed textures, cinematic composition.

Nano Banana Pro winter cabin example — Nano Banana Pro output may show structured details, multiple objects and consistent lighting.

GPT Image 1.5 winter cabin example — GPT Image 1.5 output may show faster execution, strong lighting and high photoreal detail.

Comparison Prompt – Realistic Human Portrait

Photorealistic portrait of a man in his late 30s sitting in a café near a window, natural daylight, realistic skin texture with pores and slight imperfections, subtle beard stubble, shallow depth of field, soft shadows, shot with a 50mm lens, cinematic color grading.

Nano Banana Pro realistic human portrait example — Nano Banana Pro often excels at facial structure consistency and global realism.

GPT Image 1.5 realistic human portrait example — GPT Image 1.5 typically shows stronger lighting control, lens realism and skin texture detail.

Comparison Prompt – Poster With Text

Vertical poster design for a tech event titled "AI FUTURE SUMMIT", large bold headline at the top, subtitle "Barcelona · June 2026", clean sans-serif typography, modern gradient background, high contrast, professional layout.

Nano Banana Pro poster typography example — Nano Banana Pro may preserve layout well but can vary in text precision.

GPT Image 1.5 poster typography example — GPT Image 1.5 typically renders clearer, more legible text with better hierarchy.

Comparison Prompt – Complex Market Scene

Busy outdoor street market with five vendors selling fruit, bread and flowers, customers walking between stalls, colorful umbrellas, crates of produce, handwritten price signs, midday sunlight, natural shadows, realistic depth and scale.

Nano Banana Pro complex market scene example — Nano Banana Pro often excels at maintaining object counts and scene structure.

GPT Image 1.5 complex market scene example — GPT Image 1.5 focuses on lighting realism, textures and atmosphere in dense scenes.

Comparison Prompt – Product Hero Shot

Ultra-realistic product hero shot of a wireless noise-cancelling headphone on a matte black surface, soft studio lighting, subtle rim light outlining the shape, clean reflections, shallow depth of field, premium advertising look.

Nano Banana Pro product hero shot example — Nano Banana Pro delivers solid structure and consistent product geometry.

GPT Image 1.5 product hero shot example — GPT Image 1.5 often shows more refined lighting, reflections and material realism.

Which Model Should You Use?

Choose Nano Banana Pro if you value detailed structural logic, multiple reference inputs and complex scene understanding.
Choose GPT Image 1.5 if you want faster generation, precise instruction following, excellent text rendering and commercially usable visuals.
Use both on GenAIntel to test and compare outputs side by side for your specific creative project.

Want to test and compare Nano Banana Pro and GPT Image 1.5 yourself?

Create AI images with 100+ models side-by-side with your own prompts on GenAIntel.

Try Now

100 Free Credits