Nano Banana 2 vs Seedream vs GPT Image 2 vs Grok: 14-Prompt Portrait Comparison
Fourteen adult portrait prompts with side-by-side outputs from Nano Banana 2, Seedream 4.5, GPT Image 2 Medium, Grok, and Seedream V5 Lite.
This review puts 14 adult portrait and selfie prompts into side-by-side rows across Nano Banana 2, Seedream 4.5, GPT Image 2 Medium, Grok, and Seedream V5 Lite. Every available output is shown, and failed or blocked attempts stay visible so the gaps are as inspectable as the successful images.
Comparison sample
| Model | Outputs shown | What the gaps mean |
|---|---|---|
| Nano Banana 2 | 13/14 | One attempt has no accepted output |
| Seedream 4.5 | 14/14 | An output is shown for every row |
| GPT Image 2 Medium | 5/14 | Failed or blocked attempts remain visible |
| Grok | 11/14 | Failed or blocked attempts remain visible |
| Seedream V5 Lite | 13/14 | One attempt has no accepted output |
A blocked or missing output is part of the result, not an empty cell to hide. A controlled ranking would additionally require the exact reference file, prompt, parameters, endpoint version, and run conditions to be fixed and verifiable.
Scope and limitations
- They show which output or failure is attached to each model column.
- They surface image-level details worth inspecting: skin, hands, reflections, background logic, and scene adherence.
- They cannot attribute differences to the model alone because the exact resolved input file is not proven for every attempt.
- They should not be used to rank the five models or publish cross-model completion percentages as controlled results.
All 14 five-model image comparisons
Open any output to inspect it at full size. Read across each row before moving down: the useful signal is how the models interpret the same portrait brief, including scene fidelity, skin and lighting, hand anatomy, identity drift, and blocked attempts.
Night Water Photoshoot Dark Swimsuit Blue Light
Use case: swimwear / revealing fashion. Compare prompt adherence, identity, anatomy, lighting, and scene logic at full size.
Images: Remix.Camera ↗Floor In Minimalist Studio
Use case: suggestive fashion portrait. Compare prompt adherence, identity, anatomy, lighting, and scene logic at full size.
Images: Remix.Camera ↗Girl In Beige Armchair 2012 Style Selfie
Use case: beauty editorial. Compare prompt adherence, identity, anatomy, lighting, and scene logic at full size.
Images: Remix.Camera ↗Mysterious Woman Black Sweater Hands Framing Face Editorial
Use case: beauty editorial. Compare prompt adherence, identity, anatomy, lighting, and scene logic at full size.
Images: Remix.Camera ↗Red Dress Girl Running St Petersburg Rooftop Night Flash
Use case: beauty editorial. Compare prompt adherence, identity, anatomy, lighting, and scene logic at full size.
Images: Remix.Camera ↗Vintage 90s Fashion Portrait Studio Lighting White Dress
Use case: beauty editorial. Compare prompt adherence, identity, anatomy, lighting, and scene logic at full size.
Images: Remix.Camera ↗Mirror Selfie Profile Soft Gaze
Use case: lingerie / underwear styling. Compare prompt adherence, identity, anatomy, lighting, and scene logic at full size.
Images: Remix.Camera ↗Night Water Photoshoot
Use case: swimwear / rooftop variation. Compare prompt adherence, identity, anatomy, lighting, and scene logic at full size.
Images: Remix.Camera ↗Kitchen Apron Portrait
Use case: cafe fashion portrait. Compare prompt adherence, identity, anatomy, lighting, and scene logic at full size.
Images: Remix.Camera ↗Night Water Photoshoot
Use case: casual motion fashion. Compare prompt adherence, identity, anatomy, lighting, and scene logic at full size.
Images: Remix.Camera ↗Kitchen Apron Portrait
Use case: formal flash portrait. Compare prompt adherence, identity, anatomy, lighting, and scene logic at full size.
Images: Remix.Camera ↗Beach Club Resort Portrait
Use case: resort fashion portrait. Compare prompt adherence, identity, anatomy, lighting, and scene logic at full size.
Images: Remix.Camera ↗Satin Bedsheet Reclining Portrait
Use case: bedroom glamour portrait. Compare prompt adherence, identity, anatomy, lighting, and scene logic at full size.
Images: Remix.Camera ↗Bedroom Mirror Selfie
Use case: mirror selfie / loungewear. Compare prompt adherence, identity, anatomy, lighting, and scene logic at full size.
Images: Remix.Camera ↗Full-resolution evaluation criteria
| Check | Failure that thumbnails hide |
|---|---|
| Identity | Eye spacing, jaw, hairline, and age shift between scenes |
| Skin and light | Waxy texture, contradictory catchlights, or beauty-ad smoothing in a supposedly candid shot |
| Physical logic | Hands that do not hold objects, impossible reflections, floating jewelry, or background furniture that merges |
| Production cost | Blocked attempts, rerolls, face repair, inpainting, and manual retouching before one image is usable |
Requirements for a rankable benchmark
- Freeze and hash the inputUse one exact reference file per case and store its checksum so input identity is auditable.
- Lock the run conditionsSave the full prompt, model endpoint, version, aspect ratio, safety settings, seed policy, and timestamp.
- Run multiple attemptsOne output can be lucky. Score several attempts per case and retain failures rather than replacing them silently.
- Blind the quality reviewHide model names while judging prompt adherence, identity, anatomy, physical logic, and repair effort.