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Google · Language + Image model
Nano Banana 2 (Gemini 3.1 Flash Image Preview)
google/gemini-3.1-flash-image-preview- Language
- Image
Gemini 3.1 Flash Image Preview, 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...
As a language model
Specifications
- Context window
- 65,536 tokens
- Max output
- 58,982 tokens
- Input
- image, text
- Output
- image, text
- Reasoning effort
- high, minimal
- Tokenizer
- Gemini
Supported parameters
Accepted by the model and forwarded as-is by the gateway.
- max_tokens
- reasoning
- reasoning_effort
- response_format
- seed
- structured_outputs
- temperature
- top_p
Use it
POST /api/v1/chat/completions · MCP chat · full reference
curl https://omnirail.org/api/v1/chat/completions \
-H "Authorization: Bearer $OMNIRAIL_KEY" -H "Content-Type: application/json" \
-d '{"model":"google/gemini-3.1-flash-image-preview","messages":[{"role":"user","content":"Hello"}],"max_tokens":300}'As an image model
Specifications
- Input
- image, text
- Output
- image, text
- Editing
- yes, up to 14 reference images
- Images per call
- 1
- Served by
- Google AI Studio
Request options
Validated against these values; anything else returns 400 with the allowed list.
- resolution
- 512, 1K, 2K, 4K
- aspect_ratio
- 1:1, 1:4, 1:8, 2:3, 3:2, 3:4, 4:1, 4:3, 4:5, 5:4, 8:1, 9:16, 16:9, 21:9
Use it
POST /api/v1/images · /images/edits · MCP generate_image · edit_image · full reference
curl https://omnirail.org/api/v1/images \
-H "Authorization: Bearer $OMNIRAIL_KEY" -H "Content-Type: application/json" \
-d '{"model":"google/gemini-3.1-flash-image-preview","prompt":"a lighthouse at dawn, 35mm film","aspect_ratio":"1:1"}'