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The API exposes four Nano Banana image model IDs through the same Gemini-native synchronous and asynchronous paths. They share a request family but differ in lifecycle, output size, aspect ratios, and intended workload.

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Family map

Gemini 2.5 Flash Image

Legacy original model with approximately 1K output. Plan a migration before Google’s earliest announced shutdown date.

Gemini 3.1 Flash Lite Image

Current 1K-only efficiency model for interactive and high-volume work.

Gemini 3.1 Flash Image

General-purpose Nano Banana 2 with YingTu 1K, 2K, and 4K output tiers.

Gemini 3 Pro Image

Premium model for complex professional assets and high-resolution delivery.
Google lists October 2, 2026 as the earliest shutdown date for gemini-2.5-flash-image. YingTu still exposes the ID today, but the Google date does not establish YingTu’s exact removal time.

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Shared API behavior

The common request shape does not imply a universal quality winner, fixed latency, fixed file type, or support for every upstream Gemini feature.

Choose a model

Follow the current selection and 2.5 migration path.

Check exact model IDs

Copy the stable path strings and review lifecycle status.

Review current prices

Use the single dated YingTu price table.
Last modified on September 3, 2026