Nano Banana 2 (Gemini 3.1 Flash Image Preview) vs GPT-5 Image Mini
A side-by-side comparison of two image models — real specs, pricing, strengths and weaknesses, and a clear verdict on which to choose. Kept current by our agents.
Quick verdict: which should you choose?
Choose Nano Banana 2 (Gemini 3.1 Flash Image Preview) if you need
- ✓Choose GPT-5 Image Mini if you need a 400000-token context for multi-image tasks.
- ✓Choose GPT-5 Image Mini if you need native mixed file, image and text inputs with OpenAI safety alignment.
- ✓Choose GPT-5 Image Mini if you need the lower $2 per 1M output price.
- ✓Choose GPT-5 Image Mini if you need efficient vision-heavy workflows.
Choose GPT-5 Image Mini if you need
- ✓Choose Nano Banana 2 (Gemini 3.1 Flash Image Preview) if you need fast responses for preview workflows.
- ✓Choose Nano Banana 2 (Gemini 3.1 Flash Image Preview) if you need Google's long-context multimodal handling at 131072 tokens.
- ✓Choose Nano Banana 2 (Gemini 3.1 Flash Image Preview) if you need efficient image+text input processing from Google.
Verdict
GPT-5 Image Mini leads on context window size and lower price while offering stronger safety alignment for image tasks; Nano Banana 2 (Gemini 3.1 Flash Image Preview) is positioned for faster preview workflows despite its smaller context. Both are proprietary image-focused multimodal models with unknown intelligence and speed metrics, so direct performance comparisons are not possible from the data. GPT-5 Image Mini has a clear edge for multi-image and large-context use cases, whereas Nano Banana 2 targets quick iteration at a higher cost.
Nano Banana 2 (Gemini 3.1 Flash Image Preview) vs GPT-5 Image Mini: side by side
| Spec | Nano Banana 2 (Gemini 3.1 Flash Image Preview) | GPT-5 Image Mini | Winner |
|---|---|---|---|
| Intelligence | — | — | Tie |
| Output speed | — | — | Tie |
| Output price | $3.00/1M | $2.00/1M | GPT-5 Image Mini |
| Context | 131K | 400K | GPT-5 Image Mini |
| Params | — | — | Tie |
| Type | Proprietary | Proprietary | Tie |
| Provider | OpenAI | Tie |
Detailed analysis
Pricing
Winner: GPT-5 Image MiniGPT-5 Image Mini costs $2 per 1M output tokens while Nano Banana 2 costs $3 per 1M. The $1 difference favors GPT-5 Image Mini for high-volume image and text workloads. No other pricing details are provided.
Context Window
Winner: GPT-5 Image MiniGPT-5 Image Mini provides a 400000-token context versus Nano Banana 2's 131072 tokens. This gives GPT-5 Image Mini a substantial advantage for multi-image and long-context multimodal tasks. Both models list strong long-context multimodal support in their strengths.
Multimodal Strengths
Winner: TieGPT-5 Image Mini emphasizes native mixed inputs, image safety alignment, and vision-heavy efficiency. Nano Banana 2 highlights efficient image+text handling and fast preview responses. Both are proprietary image-and-text models with overlapping but not identical focus areas.
Limitations
Winner: TieGPT-5 Image Mini notes possible latency from large context and reduced versatility for pure text. Nano Banana 2 notes reduced feature completeness as a preview and limits on non-visual tasks. Neither model provides data on intelligence or speed to offset these.
Nano Banana 2 (Gemini 3.1 Flash Image Preview)
Pros
- +Efficient handling of image+text inputs
- +Strong long-context multimodal support
- +Fast responses suitable for preview workflows
Cons
- –Preview model may have reduced feature completeness
- –Less depth on pure-text or code tasks versus larger Gemini variants
- –Image-focused specialization limits non-visual use cases
GPT-5 Image Mini
Pros
- +Very large context window for multi-image tasks
- +Native support for mixed file, image and text inputs
- +Strong OpenAI alignment on image safety
- +Efficient for vision-heavy workflows
Cons
- –Mini size may limit depth on complex non-visual reasoning
- –Image-centric focus reduces versatility for pure text tasks
- –Large context can increase latency
Summary: Nano Banana 2 (Gemini 3.1 Flash Image Preview) vs GPT-5 Image Mini
Select GPT-5 Image Mini when large context, lower price, and OpenAI image safety are priorities. Select Nano Banana 2 when preview speed from Google is the main requirement. The choice hinges on context size and cost since speed and intelligence metrics are unavailable.
Frequently asked questions
Neither is universally better; GPT-5 Image Mini wins on context and price while Nano Banana 2 targets faster previews.