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-5.4 Image 2
Google: Nano Banana 2 (Gemini 3.1 Flash Image) wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
[GPT-5.4](https://openrouter.ai/openai/gpt-5.4) Image 2 combines OpenAI's GPT-5.4 model with state-of-the-art image generation capabilities from GPT Image 2. It enables rich multimodal workflows, allowing users to seamlessly move between re…
Model details →Side-by-side comparison
| Capability | Google: Nano Banana 2 (Gemini 3.1 Flash Image) | OpenAI: GPT-5.4 Image 2 | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 131K | 272K | 🏆 OpenAI: GPT-5.4 Image 2 |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $0.50 | $8.00 | 🏆 Google: Nano Banana 2 (Gemini 3.1 Flash Image) |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $3.00 | $15.00 | 🏆 Google: Nano Banana 2 (Gemini 3.1 Flash Image) |
| 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-5.4 Image 2?
Google: Nano Banana 2 (Gemini 3.1 Flash Image) 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-5.4 Image 2?
Input: $0.50 vs $8.00 per 1M tokens. Output: $3.00 vs $15.00 per 1M tokens.
What context windows do Google: Nano Banana 2 (Gemini 3.1 Flash Image) and OpenAI: GPT-5.4 Image 2 support?
Google: Nano Banana 2 (Gemini 3.1 Flash Image) supports up to 131K tokens. OpenAI: GPT-5.4 Image 2 supports up to 272K tokens.
Do both Google: Nano Banana 2 (Gemini 3.1 Flash Image) and OpenAI: GPT-5.4 Image 2 support tool calling?
Google: Nano Banana 2 (Gemini 3.1 Flash Image): not advertised. OpenAI: GPT-5.4 Image 2: not advertised.
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