≈431 tokens on demand. Your agent reads this file only when SKILL.md points to it.
Model Capabilities & Differences
Choose the model best suited for your specific use case.
| Feature |
Gemini 2.5 Flash Image (Nano Banana) |
Gemini 3 Pro Image Preview (Nano Banana Pro) |
| Optimization |
Speed, efficiency, high-volume tasks. |
Professional asset production, complex reasoning. |
| Max Resolution |
1024x1024 (1K) |
Up to 4096x4096 (4K) |
| Thinking Process |
No |
Default "Thinking" process to refine composition. |
| Grounding |
No |
Google Search Grounding supported. |
| Reference Images |
Best with up to 3 images. |
Supports up to 14 images (5 humans, 6 objects). |
| Text Rendering |
Good |
Advanced, high-fidelity text rendering. |
Aspect Ratios & Resolutions
Gemini 2.5 Flash Image
| Aspect Ratio |
Resolution |
Tokens |
| 1:1 |
1024x1024 |
1290 |
| 9:16 |
768x1344 |
1290 |
| 16:9 |
1344x768 |
1290 |
| 4:3 |
1184x864 |
1290 |
| 3:4 |
864x1184 |
1290 |
Gemini 3 Pro Image Preview
Supports 1K, 2K, and 4K sizes. Use uppercase 'K' (e.g., 2K).
| Aspect Ratio |
1K Res |
1K Tokens |
2K Res |
2K Tokens |
4K Res |
4K Tokens |
| 1:1 |
1024x1024 |
1120 |
2048x2048 |
1120 |
4096x4096 |
2000 |
| 9:16 |
768x1376 |
1120 |
1536x2752 |
1120 |
3072x5504 |
2000 |
| 16:9 |
1376x768 |
1120 |
2752x1536 |
1120 |
5504x3072 |
2000 |
| 4:3 |
1200x896 |
1120 |
2400x1792 |
1120 |
4800x3584 |
2000 |
| 3:4 |
896x1200 |
1120 |
1792x2400 |
1120 |
3584x4800 |
2000 |
Configuration Example
config = types.GenerateContentConfig(
image_config=types.ImageConfig(
aspect_ratio="16:9",
image_size="2K", # Only for Gemini 3 Pro
)
)
