Side-by-side comparison
GPT-4o Search Preview vs Nano Banana Pro (Gemini 3 Pro Image Preview)
OpenAI
GPT-4o Search Preview
{} JSON
Input / 1M
$2.5000
Output / 1M
$10.0000
Google
Nano Banana Pro (Gemini 3 Pro Image Preview)
👁 Vision
{} JSON
Input / 1M
$2.0000
Output / 1M
$12.0000
| GPT-4o Search Preview | Nano Banana Pro (Gemini 3 Pro Image Preview) | |
|---|---|---|
| Provider | OpenAI | |
| Context window Maximum tokens (input + output) the model can process in a single request. Glossary → | 128,000 | 65,536 |
| Capabilities Optional capabilities the model advertises: vision (images), tools (function calling), json_mode (structured output). | json_mode | vision, json_mode |
| Input $ / 1M tokens Cost for tokens you send (prompt + context). Cheaper side highlighted. Glossary → | 2.5000 | 2.0000 |
| Output $ / 1M tokens Cost for tokens the model generates. Output is normally 3–5× pricier than input. Glossary → | 10.0000 | 12.0000 |
Frequently asked questions
Which is cheaper, GPT-4o Search Preview or Nano Banana Pro (Gemini 3 Pro Image Preview)?
GPT-4o Search Preview is cheaper than Nano Banana Pro (Gemini 3 Pro Image Preview) on a 50/50 input/output blend by about $0.75 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, GPT-4o Search Preview or Nano Banana Pro (Gemini 3 Pro Image Preview)?
GPT-4o Search Preview has the larger context window at 128k tokens versus 66k tokens for Nano Banana Pro (Gemini 3 Pro Image Preview). That means GPT-4o Search Preview can ingest about 2.0x as much text per request.
What is the difference between GPT-4o Search Preview and Nano Banana Pro (Gemini 3 Pro Image Preview)?
GPT-4o Search Preview comes from OpenAI; Nano Banana Pro (Gemini 3 Pro Image Preview) comes from Google. They differ in pricing, context window, and supported capabilities — see the side-by-side table on this page for the exact figures, refreshed nightly.