In our previous article, “ChatGPT Image 1.5 Is Here: Inside OpenAI’s New AI Image Generation Model before 2026”, we briefly mentioned that a full comparison between ChatGPT Image 1.5 and Nano Banana Pro was coming next. As promised, the AIPURE editorial team immediately began hands-on testing to deliver a fair and in-depth analysis.
(Image Credit: ChatGPT Image 1.5 Is Here: Inside OpenAI’s New AI Image Generation Model before 2026)
It is widely recognized that Google’s Nano Banana Pro has already claimed a dominant position in the AI image generation space, setting a high standard for realism, text rendering, and professional output. With the release of ChatGPT Images (also known as GPT Image 1.5), OpenAI has officially launched its counterattack, aiming to redefine what users can expect from an AI image generator.
In this article, we compare ChatGPT Image 1.5 vs Nano Banana Pro across multiple real-world dimensions, including:
- Image Realism (Photorealism Test)
- Multi-Text Handling (Posters & Typography)
- Anime & Manga Style Generation
- Image Editing & Local Modifications
- Commercial Use: Product Packaging Design
By evaluating these key areas, we aim to answer one core question: which is the most powerful AI image generator available today? Whether you are a content creator, designer, marketer, or AI enthusiast, this comparison will help you choose the right tool for your needs.
At AIPURE, our testing doesn’t stop here. We continuously run new experiments, including evaluations of viral prompts trending on social media platforms like YouTube, X, and Reddit, as well as real-world commercial use cases. If you want to stay updated on the latest breakthroughs in ChatGPT Images, and Nano Banana Pro, bookmarking AIPURE is the smartest choice — check back anytime, as new content may already be live.
ChatGPT Images vs Nano Banana Pro: Understanding the Basics
Before diving into hands-on tests and visual benchmarks, it’s important to review the core background information of ChatGPT Images (GPT Image 1.5) and Nano Banana Pro, along with several key comparison points that are not always visible in image samples alone. These include release dates, API pricing, free availability, supported aspect ratios, generation speed, and access to official documentation.
To save readers from switching back and forth between OpenAI and Google documentation, AIPURE has compiled a clear, side-by-side comparison table below. This overview allows you to quickly understand the essential differences between GPT Image 1.5 vs Nano Banana Pro, helping creators, developers, and businesses evaluate which image generation model best fits their workflow before moving on to deeper performance analysis.
| Feature | ChatGPT Images (GPT Image 1.5) | Nano Banana Pro (Gemini 3 Pro Image) | Winner |
| Developer | OpenAI | N/A | |
| Official Release Date | December 17, 2025 | November 21, 2025 | N/A |
| Model Type | Multimodal image generation & editing model | Advanced image generation model | N/A |
| Free Availability | Limited free usage via ChatGPT plans | Limited free access via Gemini / Google AI Studio | N/A |
| API Access | ✅ Available via OpenAI API | ✅ Available via Gemini / Google AI APIs | N/A |
| API Pricing | 1K: ~$0.15-$0.17 2K: N/A 4K: N/A | 1K: ~$0.15-$0.17 2K: $0.15 - $0.17 4K: $0.26 - $0.28 | 🏆 Nano Banana Pro |
| Supported Aspect Ratios | 1:1, 3:2, 2:3 | 1:1, 3:2, 2:3, 3:4, 4:3, 16:9, 9:16, 21:9 | 🏆 Nano Banana Pro |
| Maximum Resolution | 1K, 1.5K | 1K, 2K, 4K(via upscaling) | 🏆 Nano Banana Pro |
| Generation Speed | 1K: 30-45 seconds 1.5K: 50-60 seconds 2K: N/A 4K: N/A | 1K: 10-15 seconds 1.5K: N/A 2K: 30-60 seconds 4K: Multiple minutes | 🏆 Nano Banana Pro |
| Image Editing Support | Local edits, in-context modifications, style changes | Advanced local edits, lighting & camera controls | N/A |
| Text Rendering in Images | Improved vs previous ChatGPT Images | Strong emphasis on clear, accurate text rendering | N/A |
| Official Documentation | The new ChatGPT Images is here | Introducing Nano Banana Pro | N/A |
| Primary Use Cases | Fast creative workflows, ChatGPT-integrated editing | Professional design, ads, text-heavy visuals | N/A |
Based on the comparison of basic specifications and pricing, 🍌 Nano Banana Pro (Gemini 3 Pro Image) appears to hold a slight advantage on paper. However, numbers and features alone don’t tell the full story. Let’s move on to real-world testing to see how ChatGPT Image 1.5 vs Nano Banana Pro actually perform in practical image generation and editing scenarios.
ChatGPT Image 1.5 vs Nano Banana Pro (Real-World Testing)
As discussed earlier, this section presents a hands-on, real-world comparison of ChatGPT Image 1.5 and Nano Banana Pro across five critical dimensions: image realism, multi-text handling, anime-style generation, image editing capabilities, and commercial use cases such as product packaging. To ensure a fair and transparent evaluation, we once again relied on our "old Friend" lmarena.ai, using its Side-by-Side mode. This setup allows GPT Image 1.5 (ChatGPT Images) and Nano Banana Pro to be tested under identical prompts and conditions, enabling a clearer, more objective visual comparison of their strengths and differences.
1. Image Realism (Photorealism Test) | ChatGPT Image 1.5 vs Nano Banana Pro
💡Prompt:
(Image Credit: Imarena.ai)
✅Test purpose:
To evaluate how accurately ChatGPT Image 1.5 and Nano Banana Pro generate photorealistic human subjects in real-life settings, including natural skin texture, sunlight and shadow effects, depth of field, and overall environmental realism.
🏆Result:
- Nano Banana Pro (Gemini 3 Pro Image): Delivered slightly more lifelike skin tones, refined sunlight reflections, and realistic shadows on both the book and surrounding environment. The text on the book appeared crisp and clear. However, on closer inspection, the eyes appeared somewhat unnatural, giving away that the image was AI-generated.
(This Image was generated by AIPURE using Nano Banana Pro)
- ChatGPT Images (GPT Image 1.5): Produced highly realistic images with soft lighting, good depth of field, and faster rendering. Some minor imperfections remained, particularly the alignment of the cup and the corner of the mouth, which appeared slightly off.
(This Image was generated by AIPURE using ChatGPT Image 1.5)
- AIPURE Evaluation: Overall, in terms of perceived realism, ChatGPT Image 1.5 slightly outperforms Nano Banana Pro due to more natural facial expressions and coherent composition. However, for fine details like lighting, shadows, and text clarity, Nano Banana Pro remains impressive.
2. Multi-Text Handling (Posters & Typography) | ChatGPT Image 1.5 vs Nano Banana Pro
💡Prompt:
(Image Credit: Imarena.ai)
✅Test purpose:
To evaluate the AI model’s ability to handle dense multi-text layouts, maintain clear typography, logical columned structure, and overall information readability in a complex poster format.
🏆Result:
- Nano Banana Pro (Gemini 3 Pro Image): The generated text is clear, highly readable, and well-aligned, with excellent spacing and column structure. It maintains both readability and visual hierarchy while providing comprehensive information.
(This Image was generated by AIPURE using Nano Banana Pro)
- ChatGPT Images (GPT Image 1.5): The layout is simpler, with less information, mainly listing only key time points.
(This Image was generated by AIPURE using ChatGPT Image 1.5)
- AIPURE Evaluation: For handling large amounts of text and complex layout design, Nano Banana Pro outperforms GPT Image 1.5 in readability and layout precision. GPT Image 1.5 shows noticeable limitations in this area and requires further improvement.
3. Anime & Manga Style Generation | ChatGPT Image 1.5 vs Nano Banana Pro
💡Prompt:
(Image Credit: Imarena.ai)
✅Test purpose:
To evaluate the ability of ChatGPT Image 1.5 and Nano Banana Pro to generate high-quality anime and manga-style sequences, focusing on dynamic action, character consistency, exaggerated poses, and panel composition. This test is designed to reflect popular prompts searched by Google users interested in anime-style content generation.
🏆Result:
- Nano Banana Pro (Gemini 3 Pro Image): The generated anime images show remarkable clarity in details, such as the Konoha symbols on Sasuke and Naruto’s foreheads. The overall art style is smooth, and shadowing is handled with greater subtlety, giving the scenes a touch of realism while preserving the anime aesthetic.
(This Image was generated by AIPURE using Nano Banana Pro)
- ChatGPT Images (GPT Image 1.5): The outputs feature vibrant, dramatic colors with crisp, fluid action lines and a strong anime visual style. Exaggerated movements and dynamic panel-like compositions closely match traditional shonen manga aesthetics, making it ideal for fast-paced narrative visuals. However, some finer details, like the Konoha symbol, may appear blurred or inaccurate.
(This Image was generated by AIPURE using ChatGPT Image 1.5)
- AIPURE Evaluation: AIPURE Evaluation: For pure anime and classic manga-style generation, Nano Banana Pro excels in detail and produces a visually comfortable art style. ChatGPT Images (GPT Image 1.5), on the other hand, offers bright, eye-catching colors that appeal to viewers. Overall, both AI generators are competitive; the choice largely depends on whether users prefer subtle detail and smooth shading (Nano Banana Pro) or vivid, dynamic anime expression (GPT Image 1.5).
4. Image Editing & Local Modifications | ChatGPT Image 1.5 vs Nano Banana Pro
💡Prompt:
(Image Credit: Imarena.ai)
✅Test purpose:
To evaluate precise local image editing capabilities, including text addition, hairstyle change, background replacement, and pose modification — testing how well ChatGPT Image 1.5 vs Nano Banana Pro preserves key elements while applying multiple edits simultaneously.
🏆Result:
- Nano Banana Pro (Gemini 3 Pro Image): Also performed multiple edits with high fidelity, successfully adding the “Smile” text on the T-shirt. However, changes to the head and pose made the character appear inconsistent with the original image, and the hands looked unnatural, resembling male hands.
(This Image was generated by AIPURE using Nano Banana Pro)
- ChatGPT Images (GPT Image 1.5): Handled multiple edits smoothly, accurately adding the word “Smile” on the T-shirt, adjusting the hairstyle, replacing the background with a bookstore, and modifying the pose. However, the hand details were poorly rendered and appeared unnatural, creating noticeable inconsistencies.
(This Image was generated by AIPURE using ChatGPT Image 1.5)
- AIPURE Evaluation: Hands remain a common challenge for many AI image generators. Surprisingly, even Nano Banana Pro struggled with this, sometimes more severely than ChatGPT Image 1.5. Overall, ChatGPT Image 1.5 clearly demonstrates a stronger performance in multi-step image editing, providing a more coherent and visually consistent output.
5. Commercial Use: Product Packaging Design | ChatGPT Image 1.5 vs Nano Banana Pro
💡Prompt:
(Image Credit: Imarena.ai)
✅Test purpose:
To assess the commercial packaging design capabilities of ChatGPT Image 1.5 (GPT Image 1.5) and Nano Banana Pro, with a focus on English text accuracy, layout hierarchy, brand clarity, visual realism, and print-ready quality, which are essential for e-commerce, retail packaging, and marketing materials.
🏆Result:
- Nano Banana Pro (Gemini 3 Pro Image): Nano Banana Pro delivered excellent performance in text clarity, spacing, and overall layout precision. The packaging design appeared visually balanced and comfortable to view, immediately conveying a green, eco-friendly, and natural aesthetic that aligns well with pure skincare branding. English slogans and label icons were rendered with consistently high accuracy and professional polish.
(This Image was generated by AIPURE using Nano Banana Pro)
- ChatGPT Images (GPT Image 1.5): The generated packaging featured overly saturated colors. While visually striking, the result felt less natural, and at first glance did not clearly communicate a skincare product identity. However, text rendering was notably sharp and readable, with brand names and slogans displayed clearly and with correct spelling.
(This Image was generated by AIPURE using ChatGPT Image 1.5)
- AIPURE Evaluation: For professional product packaging and commercial-ready outputs, especially when precise English text, clean layouts, and natural brand positioning are required, Nano Banana Pro shows a clear advantage. While GPT Image 1.5 may require further color and style optimization for this use case, it still performs strongly in text handling and readability, making it suitable for early-stage design iteration and concept testing.
AIPURE’s Conclusion: ChatGPT Image 1.5 vs Nano Banana Pro — Which Is the Best AI Image Generator in 2025?
So, after all the tests, which AI image generator truly stands out?
Based on our comprehensive comparison, Nano Banana Pro currently shows a clear advantage in multi-text handling, image composition, and fine detail rendering when compared with ChatGPT Image 1.5 (GPT Image 1.5). Its ability to maintain text accuracy and produce well-structured, commercial-ready visuals makes it particularly strong for professional and business-oriented use cases.
That said, ChatGPT Image 1.5 is close behind. In terms of generation speed, anime-style illustrations, and intuitive image editing workflows, ChatGPT Images performs exceptionally well. For this reason, we recommend treating ChatGPT Image 1.5 as an excellent secondary option, especially when Nano Banana Pro experiences long processing times or is temporarily unavailable.
Looking ahead, we will continue to closely monitor both ChatGPT Image 1.5 vs Nano Banana Pro. Given the rapid pace of updates from OpenAI and Google, it is very likely that GPT Image 1.5 vs Nano Banana Pro will remain a competitive race, with both tools improving side by side in future iterations.
How Should You Choose Between GPT Image 1.5 and Nano Banana Pro?
It’s important to note that the conclusions above are based on our hands-on tests and editorial evaluation, and should be used for reference only. The best AI image generator ultimately depends on your specific needs, such as your industry, workflow, content type, and budget.
If you work with text-heavy designs, product packaging, or commercial visuals, Nano Banana Pro may be the better choice. If you prioritize fast creative iteration, anime-style artwork, or flexible image editing inside ChatGPT, then ChatGPT Image 1.5 is well worth considering.
We recommend bookmarking this article, as we will continue to update it with the latest benchmarks, features, and real-world performance insights for both tools—helping you make the most informed decision as AI image generation continues to evolve.
