Nano Banana 2 (Gemini 3.1 Flash Image)
by Google · google/gemini-3.1-flash-image · #191 cheapest of 325 paid models
Prices updated Jul 22, 2026, 1:35 AM UTC · refreshed hourly
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...
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Pricing
Input
$0.50
per 1M tokens
Output
$3.00
per 1M tokens
Blended (3:1)
$1.13
3 input : 1 output
Cache read
—
per 1M cached tokens
Cache write
—
per 1M tokens
Cache & batch economics
Effective prices for Nano Banana 2 (Gemini 3.1 Flash Image) (no cache-read rate published — hits billed as normal input).
| Cache hit rate | Effective blended $/1M | Example request* | vs no cache |
|---|---|---|---|
| 0% | $1.13 | $0.054 | — |
| 50% | $1.13 | $0.054 | −0% |
| 90% | $1.13 | $0.054 | −0% |
*Example: 100K sticky context + 2K new input + 1K output. Batch discount is an approximate 50% off list rates for this provider’s batch API. Confirm on the vendor’s pricing page.
What a request costs
| Workload | Input tokens | Output tokens | Cost / request | Cost / 1K requests |
|---|---|---|---|---|
| Short chat message | 500 | 300 | $0.00115 | $1.15 |
| Document summary | 8,000 | 1,000 | $0.007 | $7.00 |
| Codebase question (RAG) | 30,000 | 2,000 | $0.021 | $21.00 |
| Long-context analysis | 150,000 | 5,000 | $0.09 | $90.00 |
Specs
Context window
131K
tokens
Max output
33K
tokens
Input modalities
image, text
Tokenizer
Gemini