Gemini 3.1 Flash Image, a.k.a. "Nano Banana 2," is Google’s latest state of the art image generation and editing model, delivering Pro-level visual quality at Flash speed. It combines advanced...
Model details →Google: Nano Banana 2 (Gemini 3.1 Flash Image) vs OpenAI: GPT-5 Image Mini
OpenAI: GPT-5 Image Mini wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
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 inst…
Model details →Side-by-side comparison
| Capability | Google: Nano Banana 2 (Gemini 3.1 Flash Image) | OpenAI: GPT-5 Image Mini | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 131K | 400K | 🏆 OpenAI: GPT-5 Image Mini |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $0.50 | $2.50 | 🏆 Google: Nano Banana 2 (Gemini 3.1 Flash Image) |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $3.00 | $2.00 | 🏆 OpenAI: GPT-5 Image Mini |
| Tool / function calling First-class support for emitting structured tool calls. | — | — | Tie |
| Vision input Accepts image inputs alongside text. | Yes | Yes | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is Google: Nano Banana 2 (Gemini 3.1 Flash Image) better than OpenAI: GPT-5 Image Mini?
OpenAI: GPT-5 Image Mini wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between Google: Nano Banana 2 (Gemini 3.1 Flash Image) and OpenAI: GPT-5 Image Mini?
Input: $0.50 vs $2.50 per 1M tokens. Output: $3.00 vs $2.00 per 1M tokens.
What context windows do Google: Nano Banana 2 (Gemini 3.1 Flash Image) and OpenAI: GPT-5 Image Mini support?
Google: Nano Banana 2 (Gemini 3.1 Flash Image) supports up to 131K tokens. OpenAI: GPT-5 Image Mini supports up to 400K tokens.
Do both Google: Nano Banana 2 (Gemini 3.1 Flash Image) and OpenAI: GPT-5 Image Mini support tool calling?
Google: Nano Banana 2 (Gemini 3.1 Flash Image): not advertised. OpenAI: GPT-5 Image Mini: not advertised.
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