GPT Image 1.5 by OpenAI and Nano Banana Pro by Google are two of the most capable image models available on Picturesque. They occupy similar pricing tiers and superficially overlap in capability, but in practice they specialize in different categories of work. GPT Image 1.5 leads on text rendering and edit precision. Nano Banana Pro leads on character consistency and high-volume reference compositing.
This guide breaks down how each model performs in real production scenarios on Picturesque and provides a clear decision framework for picking the right one for any given job.
Try the Image Studio on Picturesque
GPT Image 1.5 at 6 Credits per Generation
GPT Image 1.5 is the strongest text rendering model on Picturesque. Posters, menus, UI mockups, signs, and meme captions all render with consistent legibility. In comparative testing on a multi-item menu prompt, GPT Image 1.5 produced eight legible menu items with correctly formatted prices, where most other models produced approximate or hallucinated text.
The model also leads on edit precision. Reference-driven instructions such as "swap the background while preserving the subject and outfit" are interpreted with a clear boundary between what to change and what to preserve, with subject identity and material properties holding through the edit.
Pricing: Three quality tiers (low, medium, high) with the medium tier at 6 credits per generation. The medium tier is appropriate for most production work. The high tier is reserved for hero shots where the additional credit cost is justified by the marginal quality gain.
Nano Banana Pro at 12 Credits per Generation
Nano Banana Pro runs on Google's Gemini 3 Pro architecture, with character consistency as the headline capability. In comparative character testing across 10 prompts featuring the same subject in different poses, lighting conditions, and backgrounds, Nano Banana Pro preserved facial structure, outfit detail, and color in 9 of 10 generations. GPT Image 1.5 preserved consistent identity in approximately 6 of 10.
Reference image cap. Up to 20 reference images per generation, the highest on the platform.
Resolution. Native 4K output, suitable for print work and high-resolution campaign deliverables.
Pricing: 12 credits per generation. The premium reflects the consistency advantage, the higher reference cap, and the 4K ceiling.
Head-to-Head Comparison
| Use case | Winner | Margin |
|---|
| Single portrait, no reference | Tied | None |
|---|---|---|
| Character series, 5 variations | Nano Banana Pro | Large |
| Product shot on white | Nano Banana Pro | Small |
| Product shot with brand color refs | Nano Banana Pro | Large |
| Poster with readable text | GPT Image 1.5 | Decisive |
| UI mockup with labels | GPT Image 1.5 | Decisive |
| Edit existing image, preserve subject | GPT Image 1.5 | Large |
| Character with reference, action pose | Nano Banana Pro | Small |
| Architectural exterior, golden hour | Tied | None |
The Real Cost of Each Model
The headline price comparison (6 vs 12 credits) understates the practical workflow cost.
For a 10-image character sheet on GPT Image 1.5, the typical re-roll rate for character consistency adds approximately 4 additional generations, bringing total real cost to roughly 84 credits. The same 10-image sheet on Nano Banana Pro typically requires 1 re-roll, bringing total real cost to roughly 132 credits.
Nano Banana Pro remains more expensive in absolute terms, but the time saved on visual evaluation and re-roll management often outweighs the credit difference for series work. For one-off generations, GPT Image 1.5 retains the cost advantage.
Decision Rules
| If the job involves... | Use |
|---|
| Posters, menus, UI mockups, any readable text | GPT Image 1.5 |
|---|---|
| One-off creative images, landscapes, architecture | GPT Image 1.5 (lower cost, comparable quality) |
| Character sheets, product lines, campaign sets | Nano Banana Pro |
| Exact brand color reproduction | Nano Banana Pro |
| Editing a single element of an existing image | GPT Image 1.5 |
| 4K output for print or large-format display | Nano Banana Pro |
Where Each Model Fits in the Picturesque Catalog
GPT Image 1.5 and Nano Banana Pro are not interchangeable. They occupy different specializations that happen to share a similar pricing band. GPT Image 1.5 is the recommended default for text-driven work and precise edits. Nano Banana Pro is the recommended default for consistency-driven work, brand campaigns, and any deliverable requiring 4K output.
Try Both Models on Picturesque
Generate text-rich images with GPT Image 1.5 at 6 credits, or run brand-consistent character work and 4K outputs through Nano Banana Pro at 12 credits. Both models are available now in the Picturesque Image Studio.