Nano Banana Pro is Google’s most advanced image-generation and editing model, built on Gemini 3 Pro. It extends the original Nano Banana with significantly improved multimodal reasoning, real-world grounding, and high-fidelity visual synthe…
Model details →Google: Nano Banana Pro (Gemini 3 Pro Image Preview) vs OpenAI: GPT-5 Image Mini
OpenAI: GPT-5 Image Mini wins on 3 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 Pro (Gemini 3 Pro Image Preview) | OpenAI: GPT-5 Image Mini | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 66K | 400K | 🏆 OpenAI: GPT-5 Image Mini |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $2.00 | $2.50 | 🏆 Google: Nano Banana Pro (Gemini 3 Pro Image Preview) |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $12.00 | $2.00 | 🏆 OpenAI: GPT-5 Image Mini |
| Tool / function calling First-class support for emitting structured tool calls. | — | Yes | 🏆 OpenAI: GPT-5 Image Mini |
| 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 Pro (Gemini 3 Pro Image Preview) better than OpenAI: GPT-5 Image Mini?
OpenAI: GPT-5 Image Mini wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between Google: Nano Banana Pro (Gemini 3 Pro Image Preview) and OpenAI: GPT-5 Image Mini?
Input: $2.00 vs $2.50 per 1M tokens. Output: $12.00 vs $2.00 per 1M tokens.
What context windows do Google: Nano Banana Pro (Gemini 3 Pro Image Preview) and OpenAI: GPT-5 Image Mini support?
Google: Nano Banana Pro (Gemini 3 Pro Image Preview) supports up to 66K tokens. OpenAI: GPT-5 Image Mini supports up to 400K tokens.
Do both Google: Nano Banana Pro (Gemini 3 Pro Image Preview) and OpenAI: GPT-5 Image Mini support tool calling?
Google: Nano Banana Pro (Gemini 3 Pro Image Preview): not advertised. OpenAI: GPT-5 Image Mini: yes.