Gemini Nano Banana 2.1 正式发布（GA）：发布 Gemini Nano Banana 2.1（gemini-nano-banana-2.1），最新的高效图像生成与对话式编辑模型

Gemini Nano Banana 2.1 正式发布（GA）：发布 Gemini Nano Banana 2.1（gemini-nano-banana-2.1），这是最新的高效图像生成与对话式编辑模型。作为 Nano Banana 2（gemini-3.1-flash-image）的更新版本，它保持了 Flash 级的速度和成本效率，同时在视觉质量、提示词遵循、多轮角色一致性、文本渲染以及宽幅和全景宽高比生成（1:4、4:1、1:8、8:1）方面实现了显著改进，并支持 1K、2K 和 4K 分辨率。请参阅图像生成指南以开始使用。弃用公告：gemini-3.1-flash-image 模型已弃用（未公布关闭日期）。请迁移至 gemini-nano-banana-2.1。

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.