Gemini Nano Banana 2.1 图像生成模型正式发布，gemini-3.1-flash-image 被弃用

October 6, 2026

AI 导读

Google 在 Gemini API 更新日志中宣布 Gemini Nano Banana 2.1（gemini-nano-banana-2.1）正式可用，作为 Nano Banana 2（gemini-3.1-flash-image）的更新版本。

推荐理由

原文列出新模型相对上一代的具体提升点和新支持的比例与分辨率，可帮助图像生成用户判断是否迁移。

正文 · 原文

Gemini Nano Banana 2.1 generally available (GA): Released Gemini Nano Banana 2.1 (gemini-nano-banana-2.1), the latest high-efficiency image generation and conversational editing model. An update to Nano Banana 2 (gemini-3.1-flash-image), it maintains Flash-level speed and cost efficiency while delivering significant improvements in visual quality, prompt adherence, multi-turn character consistency, text rendering, and wide and panoramic aspect ratio generation (1:4, 4:1, 1:8, 8:1) across 1K, 2K, and 4K resolutions.

See the Image generation guide to get started.
Deprecation announcement: The gemini-3.1-flash-image model is deprecated (no shutdown date announced). Migrate to gemini-nano-banana-2.1.