Side-by-side comparison
Nano Banana 2 (Gemini 3.1 Flash Image Preview) vs GPT-5 Image Mini
Google
Nano Banana 2 (Gemini 3.1 Flash Image Preview)
👁 Vision
{} JSON
Input / 1M
$0.5000
Output / 1M
$3.0000
OpenAI
GPT-5 Image Mini
👁 Vision
{} JSON
Input / 1M
$2.5000
Output / 1M
$2.0000
| Nano Banana 2 (Gemini 3.1 Flash Image Preview) | GPT-5 Image Mini | |
|---|---|---|
| Provider | OpenAI | |
| Context window Maximum tokens (input + output) the model can process in a single request. Glossary → | 65,536 | 400,000 |
| Capabilities Optional capabilities the model advertises: vision (images), tools (function calling), json_mode (structured output). | vision, json_mode | vision, json_mode |
| Input $ / 1M tokens Cost for tokens you send (prompt + context). Cheaper side highlighted. Glossary → | 0.5000 | 2.5000 |
| Output $ / 1M tokens Cost for tokens the model generates. Output is normally 3–5× pricier than input. Glossary → | 3.0000 | 2.0000 |
Frequently asked questions
Which is cheaper, Nano Banana 2 (Gemini 3.1 Flash Image Preview) or GPT-5 Image Mini?
Nano Banana 2 (Gemini 3.1 Flash Image Preview) is cheaper than GPT-5 Image Mini on a 50/50 input/output blend by about $0.5 per 1M tokens. Exact savings depend on your input-vs-output ratio — use the cost calculator on this page for a workload-specific estimate.
Which has a larger context window, Nano Banana 2 (Gemini 3.1 Flash Image Preview) or GPT-5 Image Mini?
GPT-5 Image Mini has the larger context window at 400k tokens versus 66k tokens for Nano Banana 2 (Gemini 3.1 Flash Image Preview). That means GPT-5 Image Mini can ingest about 6.1x as much text per request.
What is the difference between Nano Banana 2 (Gemini 3.1 Flash Image Preview) and GPT-5 Image Mini?
Nano Banana 2 (Gemini 3.1 Flash Image Preview) comes from Google; GPT-5 Image Mini comes from OpenAI. They differ in pricing, context window, and supported capabilities — see the side-by-side table on this page for the exact figures, refreshed nightly.