Google: Nano Banana 2 (Gemini 3.1 Flash Image Preview)
The Google Nano Banana 2 (Gemini 3.1 Flash Image Preview) is an AI model capable of handling both text and image inputs within a context length of 65,536 tokens. It supports reasoning but does not provide structured output or integration with external tools. While it offers flexibility in input modalities, its performance metrics are currently unverified; no independent benchmarks have been published to date. Given its pricing at $0.5 per million input tokens and $3.0 per million output tokens, the Nano Banana 2 is suitable for users requiring text and image processing capabilities who can afford higher costs. Its current lack of benchmark coverage means its performance relative to other models remains uncertain, but it might be a viable choice for those prioritizing specific modalities over cost-efficiency or benchmarked benchmarks.
- Model ID
- google/gemini-3.1-flash-image-preview
- Vendor
- Released
- February 2026
- Tokenizer
- Gemini
- Input Modalities
- image, text
- Output Modalities
- image, text
- Max Output
- 65,536 tokens
- Tool Calling
- not supported
- Structured Output
- ✓ supported
- Reasoning Mode
- ✓ supported
- Vision
- ✓ accepts images
- Audio
- no
- Moderated
- no
What it costs in practice
Computed from the current $0.50/M input and $3.00/M output rates. Run your own numbers →
| Job | Tokens | Cost |
|---|---|---|
| Summarize a 50-page report | 30k in / 1.5k out | $0.02 |
| Classify 1,000 customer emails | 500k in / 50k out | $0.40 |
| A month of a busy support chatbot | 5M in / 2M out | $8.50 |
Price & spec history
Tracked daily by PicksByModel since 2026-07-17.
| Date | Input /M | Output /M | Context |
|---|---|---|---|
| 2026-07-27 | $0.50 | $3.00 | 131,072 |
| 2026-07-27 | $0.50 | $3.00 | 65,536 |
| 2026-07-17 | $0.50 | $3.00 | 131,072 |
Category rankings
Where Google: Nano Banana 2 (Gemini 3.1 Flash Image Preview) places across the 1 category it ranks in. How we rank →
| # | Category | Score |
|---|---|---|
| #6 | Image GenerationVision · of 9 ranked | 99 |
Similar models
Google: Nano Banana 2 (Gemini 3.1 Flash Image)
Google: Gemma 3 4B
Google: Lyria 3 Pro Preview
Google: Lyria 3 Clip Preview
Google: Nano Banana Pro (Gemini 3 Pro Image)
Google: Gemma 3 12B
Quick answers
- How much does Google: Nano Banana 2 (Gemini 3.1 Flash Image Preview) cost?
- $0.50 per million input tokens and $3.00 per million output tokens.
- What is Google: Nano Banana 2 (Gemini 3.1 Flash Image Preview)'s context window?
- 131,072 tokens, roughly 196 pages of text in a single request.
- Does Google: Nano Banana 2 (Gemini 3.1 Flash Image Preview) support tool calling?
- It supports structured output, a reasoning mode.
- Can Google: Nano Banana 2 (Gemini 3.1 Flash Image Preview) process images?
- Yes, it accepts image input.