Google: gemini-3.1-flash-image-preview-4k

Gemini 3.1 Flash Image entered preview on February 26, 2026. The 4K suffix denotes an output-resolution configuration. Google released the GA version of Gemini 3.1 Flash Image on May 28, 2026, with 4K output later available as a production capability.

Modetext → text

Input price$0.25 per M tokens

Output price—

Context length

Weekly usage0 tokens

Listed at

Google

Latency—

Throughput—

Upload rate—

Context length—

Max output—

Input price$0.25per request

Output price—per request

Cache read—per request

Cache write—per request

Performance

Avg TPS—

Avg latency—

Avg success rate—

TPS—

TTFT—

Latency—

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Speed

Code Example

Replace <YOUR_API_KEY> with the API key generated on your token management page.

Authentication

All requests must include the Authorization: Bearer <TOKEN> header.

Endpoint Path

POST

Supported Parameters

ParameterTypeDefaultDescription

Rate Limits

GroupRPMTPMRPD

RPM = requests per minute, TPM = tokens per minute, RPD = requests per day. Limits apply by token group.

Pricing

GroupBilling typePrice summary