google / Image

Gemini 3.1 Flash Image 4K

google/gemini-3.1-flash-image-4k

Nano Banana 2 at 4K resolution (4096 px for 1:1)

Best for: High-resolution 4K images for print and large displays

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Catalog status

Enabled

Research checked

2026-10-06

Benchmark results

No recorded results

Results are source-attributed, not TokenRex measurements. Different tests and thinking variants are not interchangeable.

Published benchmark coverage

Reviewed sources do not include results for this exact version. Provider specifications and API capabilities remain listed separately.

Model specifications

Input and output modalities

Provider-reported formats; API compatibility is detailed below.

Input

Not verified

Output

Not verified

Exact model ID: google/gemini-3.1-flash-image-4k
Model type: Image

Exact token limits are not published in the reviewed sources, so no estimated limits are shown.

Versions and image configurations

Choose from 3 enabled versions. The exact ID determines the version and its price; benchmark scores do not carry over between variants.

Gemini 3.1 Flash Image$0.0671 per image

Gemini 3.1 Flash Image 2K$0.101 per image

Gemini 3.1 Flash Image 4KSelected$0.151 per image

Image quality, resolution, pricing and editing

Every price below is the official provider price converted at ₹96 per US dollar, and you pay exactly that price. OpenAI image models are billed by the tokens the request actually uses, so Low quality costs far less than Max. Gemini image models are billed per image, and each resolution has its own model ID.

Model	Quality	Size / resolution	Aspect ratio	Formats	Transparent	Editing	Price
`google/gemini-3.1-flash-image`	Fixed	1K (default) · 2K · 4K versions	14 ratios (image_config.aspect_ratio)	PNG	No	Yes (multiple references)	₹4.03 at 1K · ₹6.06 at 2K · ₹9.06 at 4K per image Use google/gemini-3.1-flash-image-2k or -4k. 0.5K is not available through the gateway.

How to use each control

Resolution (Gemini): pick the model ID — google/gemini-3.1-flash-image (1K), -2k or -4k; same for google/gemini-3-pro-image. Tested: 1K returned 1024×1024, 2K returned 2048×2048, 4K returned 4096×4096. Lite and 2.5 Flash are 1K only.
Aspect ratio (Gemini 3 Pro / 3.1 Flash): send "image_config": {"aspect_ratio": "16:9"}. Tested: 3.1 Flash 4K at 16:9 returned 5504×3072. Gemini does not accept OpenAI quality, size, format or background fields.
Editing: POST /v1/images/edits with one image or several image[] files, in order. OpenAI models also accept a PNG mask. Gemini makes one image per request (n=1).
Charges: you only pay for images actually returned. A failed request is refunded. The exact charge is in the x-tokenbaazar-cost-paise response header.

OpenAI pricing · Gemini pricing · OpenAI image controls · Gemini image controls

tokenrex — openai quality

curl https://tokenrex.ai/api/public/v1/images/generations \
  -H "Authorization: Bearer $TOKENBAZAAR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"openai/gpt-image-2.5-sunburst","prompt":"A blue ceramic cup, isolated","quality":"low","size":"1024x1024","background":"transparent","output_format":"png"}'

Features and tool support

TokenRex’s exposed interface, not every feature advertised by the provider. “Available” describes the implemented interface, not a successful test of every input or tool.

Input through TokenRex

Available

Text prompt on POST /v1/images/generations; reference images on edit-capable models. Settings are checked and unsupported ones are rejected.

Output through TokenRex

Available

Generated image (base64) in the chosen size, quality and format supported by this model.

Function tools

Not exposed

Image endpoint only — it creates images and does not run tools.

Sources and verification

Provider specifications describe the upstream model, not a guarantee of every feature through TokenRex. Prices come from the enabled catalog; benchmark results belong to the exact tested model.

Vendor model documentation
Vendor-reported
Last checked 2026-10-06
Artificial Analysis · Text-to-Image Arena
Third-party report
Last checked 2026-10-06

Research notes (1)

The reviewed discovery source does not verify every specification for this exact TokenRex ID. Missing fields have not been inferred from other releases.