GPT-5 Image Mini vs Nano Banana (Gemini 2.5 Flash Image)
How do these models stack up? Below is an expert side-by-side comparison of specifications, context window capacity, live pricing per million tokens, and standardized benchmark scores for GPT-5 Image Mini and Nano Banana (Gemini 2.5 Flash Image).
GPT-5 Image Mini
GPT-5 Image Mini combines OpenAI's advanced language capabilities, powered by [GPT-5 Mini](https://openrouter.ai/openai/gpt-5-mini), with GPT Image 1 Mini for efficient image generation. This natively multimodal model features superior instruction following, text...
Nano Banana (Gemini 2.5 Flash Image)
Gemini 2.5 Flash Image, a.k.a. "Nano Banana," is now generally available. It is a state of the art image generation model with contextual understanding. It is capable of image generation,...
Technical Specifications
| Specification | GPT-5 Image Mini | Nano Banana (Gemini 2.5 Flash Image) |
|---|---|---|
| Provider | OpenAI | |
| Context Window | 400,000 tokens | 32,768 tokens |
| Agent Suitability | N/A | N/A |
| Time to First Token (TTFT) | N/A | N/A |
| Deployment Model | managed api | managed api |
| Production Stability | stable | stable |
| API Available | Yes | Yes |
| Released Date | 2025-10-16 | 2025-10-07 |
API Pricing Comparison
Input Price per Million Tokens
GPT-5 Image Mini
$2.50
Nano Banana (Gemini 2.5 Flash Image)
$0.30
Output Price per Million Tokens
GPT-5 Image Mini
$2.00
Nano Banana (Gemini 2.5 Flash Image)
$2.50
Want to test both models live?
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Benchmark Performance Metrics
Scores show the raw performance percentages verified across key evaluation suites. Higher bars indicate superior accuracy and capability in that domain.
GPT-5 Image Mini Quirks & Gotchas
No developer gotchas reported.
Nano Banana (Gemini 2.5 Flash Image) Quirks & Gotchas
No developer gotchas reported.