GPT Image 2 vs Nano Banana Pro (Gemini 3 Pro Image): price and capabilities
GPT Image 2 (openai/gpt-image-2) from OpenAI and Nano Banana Pro (Gemini 3 Pro Image, google/gemini-3-pro-image) from Google are both image generation models on the OceanToken API. GPT Image 2 costs less for image output: $27.00 against $108.00 per 1M image tokens (75% less); Nano Banana Pro costs less for input: $1.80 against $4.50 per 1M input tokens (60% 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 Pro −10% |
|---|---|---|
| Model | GPT Image 2openai/ | Nano Banana Pro (Gemini 3 Pro Image)google/ |
| Publisher | OpenAI | |
| Kind | Image generation | Image generation |
| Input price | $4.50 / 1M tokens | $1.80 / 1M tokens |
| Image output price | $27.00 / 1M image tokens | $108.00 / 1M image tokens |
| Cached input price | $1.25 / 1M tokens | $0.20 / 1M tokens |
| Output price | – | $10.80 / 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 Pro 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 Pro
Frequently asked questions
Which is cheaper, GPT Image 2 or Nano Banana Pro?
It depends on the mix of tokens. GPT Image 2 costs less for image output: $27.00 against $108.00 per 1M image tokens (75% less); Nano Banana Pro costs less for input: $1.80 against $4.50 per 1M input tokens (60% 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 Pro?
Neither: both take text and images.
Can I call both GPT Image 2 and Nano Banana Pro 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-pro-image.
Models and publishers
GPT Image 2 · Nano Banana Pro · All OpenAI models · All Google models
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