Google 发布图像模型 Nano Banana 2.1，价格约为前代一半
Google's new image model Nano Banana 2.1 generates better images for less money
Google 发布图像生成与编辑模型 Nano Banana 2.1，取代 2026 年 2 月发布的 Nano Banana 2，官方称其在各方面均有提升。价格约为前代一半，1K 图像从 6.70 美分降至 3.36 美分，4K 从 15.10 美分降至 7.56 美分。该模型基于 Gemini 3.6 Flash，支持 1K、2K、4K 分辨率，最多可同时处理 14 张参考图并保持 4 个角色和 10 个物体一致，已陆续接入 Gemini 应用、Google 搜索 AI Mode、Google AI Studio、Flow、Stitch、Google Ads 和 Gemini 企业平台；旧模型 gemini-3.1-flash-image 将于 2026 年 10 月 29 日停用。
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原文给出 Nano Banana 2.1 的定价与能力变化，读者可据此判断它在 Google 图像模型序列中的性价比位置。
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Google has released Nano Banana 2.1, a new model for image generation and editing.
It replaces Nano Banana 2 , released in February 2026, and Google says it improves on previous versions "across the board." Nano Banana Pro likely remains Google's best image model, but it uses the most recent Pro model, 3.1, while 2.1 uses Gemini 3.6 Flash . The next major gain in image quality could come with Google's announced Pro model, Gemini 4 Argon .
Google is also cutting prices roughly in half compared with Nano Banana 2. A 1K image costs 3.36 cents, down from 6.70 cents, while a 4K image drops from 15.10 to 7.56 cents. Nano Banana Pro costs considerably more at 13.40 cents per 1K image.
According to Google , version 2.1 improves visual quality, text rendering, character consistency across conversation turns, wide panoramas, and infographics. It can process up to 14 reference images at once, keeping up to four characters and ten objects consistent. The model also connects to Google Search and offers minimal, medium, and high thinking levels that affect image quality.
Although 2.1 sometimes beats Pro by a wide margin in benchmarks, Nano Banana 2 also matched it in those tests. In practice, Nano Banana Pro often still produces noticeably better images. Google describes 2.1 as "the more efficient counterpart" to Pro.
The model runs at Flash-tier speed, supports 1K, 2K, and 4K resolutions, and is already rolling out across Google's products. These include the Gemini app, AI Mode in Google Search, Google AI Studio, Flow by Google, Stitch by Google, Google Ads, and the Gemini Enterprise Platform.
More details are available in the model card . Google will shut down the previous model , "gemini-3.1-flash-image," on October 29, 2026.