So the better question is not “Which model is best?” It is: Which model is more likely to make your image workflow faster, cheaper and less painful? A team producing hundreds of ad variants may need a different default model from a designer building high-fidelity product mockups or an editor working through multiple rounds of local changes.

Bottom line: pick by workflow, not by hype

For production use, start with the job you need the model to do:

• Try GPT Image 2 first if your workflow values fast, high-quality generation and editing, text and image inputs, flexible output sizes, high-fidelity image inputs and API production metrics. OpenAI’s community release material also frames GPT Image 2 around production assets that need to be accurate, readable, on-brand, localized, formatted for the destination surface and usable with less cleanup.
• Try Nano Banana Pro first if your work leans toward complex multi-turn editing, professional graphic design, high-fidelity product mockups, factual visualizations, accurate text rendering or real-world grounding through Google Search.
• Test both for high-value work. Public rankings cannot substitute for your prompts, brand rules, budget, review process and tolerance for rework. The winner is often not the model that makes the prettiest single image. It is the one with the higher first-pass acceptance rate, fewer text errors, faster delivery and lower total cost.

What the public benchmark evidence can — and cannot — tell you

Official documentation confirms positioning, not a universal winner

OpenAI’s API documentation describes GPT Image 2 as OpenAI’s state-of-the-art image generation model for fast, high-quality image generation and editing. The model supports text and image inputs, image output, flexible image sizes and high-fidelity image inputs.

Google’s Vertex AI documentation describes Gemini 3 Pro Image, also referred to as Gemini 3 Pro with Nano Banana, as a model designed for challenging image generation with state-of-the-art reasoning capabilities. Google says it is best for complex and multi-turn image generation and editing, with improved accuracy and enhanced image quality.

Google’s developer documentation is even more specific about Nano Banana Pro: it calls Gemini 3 Pro Image Preview a reasoning-driven engine for professional-grade image editing and generation, suited to complex graphic design, high-fidelity product mockups and factual data visualizations that need accurate text rendering and real-world grounding via Google Search.

Google’s own blog says Nano Banana Pro is built on Gemini 3 Pro and uses Gemini’s reasoning and real-world knowledge to visualize information more effectively. TechCrunch’s launch coverage likewise reports Google’s claims of stronger editing, higher resolutions, more accurate text rendering and web search capability.

Those claims matter, but they do not prove one model beats the other in every task. They tell you where each company believes its model is strongest.

Third-party benchmarks are useful when read narrowly

Artificial Analysis has a GPT Image 2 provider benchmark page that focuses on API generation time, latency and price, and lets users generate and compare images across models such as Nano Banana and GPT Image. That is highly relevant for engineering teams. It helps answer questions like: How long will users wait? What is the price per batch? Which provider is more predictable?

But those metrics are not a complete blind quality test. They do not, by themselves, settle questions such as typography accuracy, edit controllability, brand consistency or photorealism.

OpenAI’s community release post includes an Arena.AI text-to-image leaderboard graphic showing GPT-Image-2 ranked No. 1 with a score of 1,512. That is a useful signal about community preference and launch positioning. Still, the visible material does not provide a full test set, rater protocol, repeat-sampling method or statistical significance analysis, so it should not be treated as a final scientific verdict.

Google DeepMind’s Nano Banana Pro page calls it a state-of-the-art image generation and editing model and links to model card and benchmark material. In the material available here, however, there is still no complete, direct, public and reproducible quality showdown between Nano Banana Pro and GPT Image 2.

Be careful with strong third-party claims

Some third-party articles make more aggressive claims. APIYI, for example, says GPT-Image-2 topped the LMArena Image leaderboard with an Elo score of 1,512 after release and describes Nano Banana Pro as the previous champion. Treat that as a lead worth checking, not as a production decision. Without a transparent test design and reproducible scoring method, a leaderboard claim should not override your own workflow tests.

Also check the comparison target. Some search results compare GPT Image 2 with Nano Banana 2, not Nano Banana Pro. Nano Banana 2, Nano Banana Pro and Gemini 3 Pro Image are not interchangeable labels, so conclusions about one should not automatically be applied to another.

Capability comparison

Which model should you test first?

1. Posters, infographics and presentation visuals with text

Text-heavy images are where small failures become expensive. A single misspelled word, broken label or awkward line break can make an otherwise beautiful asset unusable.

Here, both models deserve a test. GPT Image 2 has a strong workflow signal from OpenAI’s production framing: accurate, readable, on-brand, localized and formatted for the destination surface, with less cleanup required. Nano Banana Pro has a strong signal from Google’s emphasis on accurate text rendering, factual data visualizations and Google Search grounding.

A practical starting point:

• For SaaS graphics, brand ads, documentation images, social variants and fast production runs, start with GPT Image 2.
• For knowledge-heavy infographics, factual explainers or visuals that benefit from search grounding, prioritize Nano Banana Pro in the first test batch.

2. Complex multi-turn editing and local changes

For multi-step edits, Nano Banana Pro’s official positioning is clearer. Google Vertex AI says Gemini 3 Pro Image is best for complex and multi-turn image generation and editing, with improved accuracy and image quality.

GPT Image 2 still belongs in the evaluation set because it supports image generation and editing with high-fidelity image inputs. If your edits are mostly lightweight — background swaps, quick variants, standardized adjustments — GPT Image 2 may be a strong operational fit. If you need repeated edits that preserve context, local changes that do not disturb the rest of the image, product consistency or complex composition control, Nano Banana Pro should be high on the shortlist.

3. Product mockups, e-commerce images and campaign hero visuals

Nano Banana Pro’s documentation directly names high-fidelity product mockups and complex graphic design. That makes it an obvious first test for packaging mockups, material rendering, product-in-scene images and premium advertising visuals.

GPT Image 2’s case is different: it is positioned around fast, high-quality, API-friendly generation and editing, with OpenAI’s community material emphasizing production needs such as brand fit, readability, localization and reduced cleanup.

For marketing and e-commerce teams, do not judge only the most impressive first image. Track the usable-image rate, text error rate, editing time, review time and total cost per accepted asset.

4. Speed, latency, price and production reliability

If the model is going into a live product, speed and cost may matter more than leaderboard placement. Artificial Analysis explicitly compares generation time, latency and price across API providers for GPT Image 2. Those numbers affect user wait time, batch throughput and unit economics.

Keep two scorecards: one for image quality, one for operations. On the operations side, record generation time, failed requests, retries, price per image and manual rework. A model that looks slightly better in a gallery may still lose if it creates more failures or slows the workflow.

A practical A/B test you can reuse

Public benchmarks can help you shortlist models. They cannot make the final decision for your business. A small, repeatable A/B test with your own prompts is usually more valuable.

1. Build a set of 20 to 50 real prompts

Do not rely only on viral demo prompts. Include the tasks your team actually ships:

• Text-heavy assets: posters, menus, process diagrams, technical explainers, multilingual headlines.
• Product work: white-background product shots, lifestyle scenes, packaging mockups, material close-ups, brand-consistent layouts.
• Editing tasks: background replacement, preserving a person or product, changing one object, and multi-round local edits.
• Visual reasoning tasks: maps, structure diagrams, dashboards, scientific or medical illustrations, factual data visualizations.

2. Control the variables

For each task, keep the prompt, reference images, aspect ratio, target size and number of samples as consistent as the tools allow. If seed control is available, use it. If not, generate several outputs per task so you are not judging a model by a lucky best image or an unlucky failure.

3. Score more than aesthetics

For every image, record:

• Text accuracy: misspellings, missing words, garbled characters, broken layout.
• Prompt following: subject, style, composition, color and size requirements.
• Subject consistency: whether people, products and brand elements remain stable.
• Edit control: whether local changes affect areas that should remain untouched.
• Detail realism: material, lighting, perspective, edges and critical features.
• First-pass acceptance rate: how often the output can be used without rework.
• Engineering metrics: generation time, failure rate, retries and API cost per image.
• Total cost: include human retouching, review and re-generation time.

4. Let the workflow decide the default

If visual quality is close, a sensible default is to use GPT Image 2 for bulk generation and fast variants, while reserving Nano Banana Pro for complex multi-turn edits, product mockups, factual visualizations and high-value visuals.

If your core business is complex editing, professional design or grounded infographics, reverse that setup: make Nano Banana Pro the primary model and use GPT Image 2 for rapid variations, comparison runs and cost-sensitive production tasks.

Final recommendation

GPT Image 2 and Nano Banana Pro should not be reduced to a one-line “winner.” Based on the public material available, GPT Image 2 looks like the more natural default for fast, high-quality, API-oriented image generation and editing. Nano Banana Pro looks more directly aimed at complex, multi-turn, reasoning-driven work, especially professional design, high-fidelity mockups and grounded visual explanations.

For a one-off creative image, try both. For commercial production, do not rely on a single leaderboard, launch graphic or cherry-picked demo. Run the models against your real prompts, brand rules and cost constraints. That is the benchmark that actually matters.

So the better question is not “Which model is best?” It is: Which model is more likely to make your image workflow faster, cheaper and less painful? A team producing hundreds of ad variants may need a different default model from a designer building high-fidelity product mockups or an editor working through multiple rounds of local changes.

Bottom line: pick by workflow, not by hype

For production use, start with the job you need the model to do:

• Try GPT Image 2 first if your workflow values fast, high-quality generation and editing, text and image inputs, flexible output sizes, high-fidelity image inputs and API production metrics. OpenAI’s community release material also frames GPT Image 2 around production assets that need to be accurate, readable, on-brand, localized, formatted for the destination surface and usable with less cleanup.
• Try Nano Banana Pro first if your work leans toward complex multi-turn editing, professional graphic design, high-fidelity product mockups, factual visualizations, accurate text rendering or real-world grounding through Google Search.
• Test both for high-value work. Public rankings cannot substitute for your prompts, brand rules, budget, review process and tolerance for rework. The winner is often not the model that makes the prettiest single image. It is the one with the higher first-pass acceptance rate, fewer text errors, faster delivery and lower total cost.

What the public benchmark evidence can — and cannot — tell you

Official documentation confirms positioning, not a universal winner

OpenAI’s API documentation describes GPT Image 2 as OpenAI’s state-of-the-art image generation model for fast, high-quality image generation and editing. The model supports text and image inputs, image output, flexible image sizes and high-fidelity image inputs.

Google’s Vertex AI documentation describes Gemini 3 Pro Image, also referred to as Gemini 3 Pro with Nano Banana, as a model designed for challenging image generation with state-of-the-art reasoning capabilities. Google says it is best for complex and multi-turn image generation and editing, with improved accuracy and enhanced image quality.

Google’s developer documentation is even more specific about Nano Banana Pro: it calls Gemini 3 Pro Image Preview a reasoning-driven engine for professional-grade image editing and generation, suited to complex graphic design, high-fidelity product mockups and factual data visualizations that need accurate text rendering and real-world grounding via Google Search.

Google’s own blog says Nano Banana Pro is built on Gemini 3 Pro and uses Gemini’s reasoning and real-world knowledge to visualize information more effectively. TechCrunch’s launch coverage likewise reports Google’s claims of stronger editing, higher resolutions, more accurate text rendering and web search capability.

Those claims matter, but they do not prove one model beats the other in every task. They tell you where each company believes its model is strongest.

Third-party benchmarks are useful when read narrowly

Artificial Analysis has a GPT Image 2 provider benchmark page that focuses on API generation time, latency and price, and lets users generate and compare images across models such as Nano Banana and GPT Image. That is highly relevant for engineering teams. It helps answer questions like: How long will users wait? What is the price per batch? Which provider is more predictable?

But those metrics are not a complete blind quality test. They do not, by themselves, settle questions such as typography accuracy, edit controllability, brand consistency or photorealism.

OpenAI’s community release post includes an Arena.AI text-to-image leaderboard graphic showing GPT-Image-2 ranked No. 1 with a score of 1,512. That is a useful signal about community preference and launch positioning. Still, the visible material does not provide a full test set, rater protocol, repeat-sampling method or statistical significance analysis, so it should not be treated as a final scientific verdict.

Google DeepMind’s Nano Banana Pro page calls it a state-of-the-art image generation and editing model and links to model card and benchmark material. In the material available here, however, there is still no complete, direct, public and reproducible quality showdown between Nano Banana Pro and GPT Image 2.

Be careful with strong third-party claims

Some third-party articles make more aggressive claims. APIYI, for example, says GPT-Image-2 topped the LMArena Image leaderboard with an Elo score of 1,512 after release and describes Nano Banana Pro as the previous champion. Treat that as a lead worth checking, not as a production decision. Without a transparent test design and reproducible scoring method, a leaderboard claim should not override your own workflow tests.

Also check the comparison target. Some search results compare GPT Image 2 with Nano Banana 2, not Nano Banana Pro. Nano Banana 2, Nano Banana Pro and Gemini 3 Pro Image are not interchangeable labels, so conclusions about one should not automatically be applied to another.

Capability comparison

Which model should you test first?

1. Posters, infographics and presentation visuals with text

Text-heavy images are where small failures become expensive. A single misspelled word, broken label or awkward line break can make an otherwise beautiful asset unusable.

Here, both models deserve a test. GPT Image 2 has a strong workflow signal from OpenAI’s production framing: accurate, readable, on-brand, localized and formatted for the destination surface, with less cleanup required. Nano Banana Pro has a strong signal from Google’s emphasis on accurate text rendering, factual data visualizations and Google Search grounding.

A practical starting point:

• For SaaS graphics, brand ads, documentation images, social variants and fast production runs, start with GPT Image 2.
• For knowledge-heavy infographics, factual explainers or visuals that benefit from search grounding, prioritize Nano Banana Pro in the first test batch.

2. Complex multi-turn editing and local changes

For multi-step edits, Nano Banana Pro’s official positioning is clearer. Google Vertex AI says Gemini 3 Pro Image is best for complex and multi-turn image generation and editing, with improved accuracy and image quality.

GPT Image 2 still belongs in the evaluation set because it supports image generation and editing with high-fidelity image inputs. If your edits are mostly lightweight — background swaps, quick variants, standardized adjustments — GPT Image 2 may be a strong operational fit. If you need repeated edits that preserve context, local changes that do not disturb the rest of the image, product consistency or complex composition control, Nano Banana Pro should be high on the shortlist.

3. Product mockups, e-commerce images and campaign hero visuals

Nano Banana Pro’s documentation directly names high-fidelity product mockups and complex graphic design. That makes it an obvious first test for packaging mockups, material rendering, product-in-scene images and premium advertising visuals.

GPT Image 2’s case is different: it is positioned around fast, high-quality, API-friendly generation and editing, with OpenAI’s community material emphasizing production needs such as brand fit, readability, localization and reduced cleanup.

For marketing and e-commerce teams, do not judge only the most impressive first image. Track the usable-image rate, text error rate, editing time, review time and total cost per accepted asset.

4. Speed, latency, price and production reliability

If the model is going into a live product, speed and cost may matter more than leaderboard placement. Artificial Analysis explicitly compares generation time, latency and price across API providers for GPT Image 2. Those numbers affect user wait time, batch throughput and unit economics.

Keep two scorecards: one for image quality, one for operations. On the operations side, record generation time, failed requests, retries, price per image and manual rework. A model that looks slightly better in a gallery may still lose if it creates more failures or slows the workflow.

A practical A/B test you can reuse

Public benchmarks can help you shortlist models. They cannot make the final decision for your business. A small, repeatable A/B test with your own prompts is usually more valuable.

1. Build a set of 20 to 50 real prompts

Do not rely only on viral demo prompts. Include the tasks your team actually ships:

• Text-heavy assets: posters, menus, process diagrams, technical explainers, multilingual headlines.
• Product work: white-background product shots, lifestyle scenes, packaging mockups, material close-ups, brand-consistent layouts.
• Editing tasks: background replacement, preserving a person or product, changing one object, and multi-round local edits.
• Visual reasoning tasks: maps, structure diagrams, dashboards, scientific or medical illustrations, factual data visualizations.

2. Control the variables

For each task, keep the prompt, reference images, aspect ratio, target size and number of samples as consistent as the tools allow. If seed control is available, use it. If not, generate several outputs per task so you are not judging a model by a lucky best image or an unlucky failure.

3. Score more than aesthetics

For every image, record:

• Text accuracy: misspellings, missing words, garbled characters, broken layout.
• Prompt following: subject, style, composition, color and size requirements.
• Subject consistency: whether people, products and brand elements remain stable.
• Edit control: whether local changes affect areas that should remain untouched.
• Detail realism: material, lighting, perspective, edges and critical features.
• First-pass acceptance rate: how often the output can be used without rework.
• Engineering metrics: generation time, failure rate, retries and API cost per image.
• Total cost: include human retouching, review and re-generation time.

4. Let the workflow decide the default

If visual quality is close, a sensible default is to use GPT Image 2 for bulk generation and fast variants, while reserving Nano Banana Pro for complex multi-turn edits, product mockups, factual visualizations and high-value visuals.

If your core business is complex editing, professional design or grounded infographics, reverse that setup: make Nano Banana Pro the primary model and use GPT Image 2 for rapid variations, comparison runs and cost-sensitive production tasks.

Final recommendation

GPT Image 2 and Nano Banana Pro should not be reduced to a one-line “winner.” Based on the public material available, GPT Image 2 looks like the more natural default for fast, high-quality, API-oriented image generation and editing. Nano Banana Pro looks more directly aimed at complex, multi-turn, reasoning-driven work, especially professional design, high-fidelity mockups and grounded visual explanations.

For a one-off creative image, try both. For commercial production, do not rely on a single leaderboard, launch graphic or cherry-picked demo. Run the models against your real prompts, brand rules and cost constraints. That is the benchmark that actually matters.