AI Model Atlas / Google
Nano Banana 2 (Gemini 3.1 Flash Image)
One million input tokens cost $0.50 and one million output tokens $3.00. Context window: 131k tokens, about 218 A4 pages.
What it costs in practice
Pricing per million tokens doesn't mean anything to anyone, so I convert it to three tasks that people actually give to models. The usage assumptions are listed for each row so you can verify them.
| Task | Input | Output | Cost |
|---|---|---|---|
| 1500-word articlebrief plus finished text in English | 1,500 tokens | 2,200 tokens | $0.0074 |
| 100 chat queries700 tokens per question and 400 per answer | 70,000 tokens | 40,000 tokens | $0.16 |
| Hour of work with an agentagent reads repository and writes fixes | 250,000 tokens | 30,000 tokens | $0.22 |
Technical details
| Provider | |
| Modalities | image + text → image + text |
| Context window | 131k tokens (~218 A4 pages) |
| Maximum response | 33k tokens |
| Step-by-step reasoning | yes |
| Tool calling | no |
| Forced JSON format | yes |
| Knowledge cutoff | not specified |
| Cache read | no data |
| Content moderation | no extra filter |
How it compares to the rest
The database contains 469 models. In terms of input pricing Nano Banana 2 (Gemini 3.1 Flash Image) is more expensive than 49 percent of paid models. A longer context window is available in 363 models.
Input price history
2026-09-08 · $0.502026-11-11 · $0.50
The chart shows the price of a million input tokens on consecutive measurement days. History starts on the day I launched the atlas and grows with each day. I don't backfill data.
Alternatives at a similar price
Models from other providers whose cost for the same article comes out closest.
| Model | Input / M | Output / M | 1500-word article | Context |
|---|---|---|---|---|
| Seed-2.0-CodeBytedance seed | $0.50 | $3.00 | $0.0074 | 262k |
| Grok 4.3xAI | $1.25 | $2.50 | $0.0074 | 1M |
| Grok 4.20 Multi-AgentxAI | $1.25 | $2.50 | $0.0074 | 2M |
| Grok 4.20xAI | $1.25 | $2.50 | $0.0074 | 2M |
Compare Nano Banana 2 (Gemini 3.1 Flash Image) with another model or go back to the full database 469 models.