GPT Image 2 vs Nano Banana 2 (Gemini 3.1 Flash Image): price and capabilities
GPT Image 2 (openai/gpt-image-2) from OpenAI and Nano Banana 2 (Gemini 3.1 Flash Image, google/gemini-3.1-flash-image) from Google are both image generation models on the OceanToken API. GPT Image 2 costs less for image output: $27.00 against $54.00 per 1M image tokens (50% less); Nano Banana 2 costs less for input: $0.45 against $4.50 per 1M input tokens (90% less). The cost of one image also depends on how many image tokens each model uses for it. Both are 10% off their official price on OceanToken, for every account. Both take text prompts and reference images.
Side by side
| Spec | GPT Image 2 −10% | Nano Banana 2 −10% |
|---|---|---|
| Model | GPT Image 2openai/ | Nano Banana 2 (Gemini 3.1 Flash Image)google/ |
| Publisher | OpenAI | |
| Kind | Image generation | Image generation |
| Input price | $4.50 / 1M tokens | $0.45 / 1M tokens |
| Image output price | $27.00 / 1M image tokens | $54.00 / 1M image tokens |
| Cached input price | $1.25 / 1M tokens | – |
| Output price | – | $2.70 / 1M tokens |
| Discount (vs official, top tier) | −10% | −10% |
| Inputs | text and images | text and images |
| Outputs | image | image and text |
About these prices
Which should you choose?
- Price depends on the mix: GPT Image 2 costs less for image output and Nano Banana 2 for input, so estimate both on your own volume of input tokens and image tokens.
- Both take the same inputs: text prompts and reference images.
- Not sure? Call both with the same OceanToken API key and compare them on your own prompts and references; each request is billed per use from one prepaid balance.
Get API Key GPT Image 2 Nano Banana 2
Frequently asked questions
Which is cheaper, GPT Image 2 or Nano Banana 2?
It depends on the mix of tokens. GPT Image 2 costs less for image output: $27.00 against $54.00 per 1M image tokens (50% less); Nano Banana 2 costs less for input: $0.45 against $4.50 per 1M input tokens (90% less). The cost of one image also depends on how many image tokens each model uses for it. Both are 10% off their official price on OceanToken, for every account. The OceanToken console always shows the current price.
Which takes more kinds of input, GPT Image 2 or Nano Banana 2?
Neither: both take text and images.
Can I call both GPT Image 2 and Nano Banana 2 with one API key?
Yes. Both are on the OceanToken API at https://api.oceantoken.ai/v1: one API key and one prepaid balance call either model. Send the model id openai/gpt-image-2 or google/gemini-3.1-flash-image.
Models and publishers
GPT Image 2 · Nano Banana 2 · All OpenAI models · All Google models
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