一周 AI 图像更新汇总：Kling 4.0 Flash 早期访问支持 4K 与 HDR
六条 AI 更新合集里提到 Kling 4.0 Flash 处于早期访问，支持最高 4K、立体声音频和 10-bit HDR，其余为图像模型动态。
AI art moved fast this week. 6 updates worth knowing: 1. Nano Banana 2.1 dropped. 14-reference fusion, text rendering that actually works, up to 4K. Google's quiet model just got loud. 2. ChatGPT is bringing ads into image generation. They show up while your image renders. 3. Tencent Hy Image 3.5 Preview. $0.024/image with ComfyUI nodes. 4. Seedream 5.0 Flash. $0.018/image, 15 seconds. A year ago this cost 10x more. 5. Kling 4.0 Flash in early access. Up to 4K, stereo audio, 10-bit HDR. 6. Vidu Q4 Preview just dropped. 15 image refs, 3 audio refs, 4K. Built for production. Better models. Bigger possibilities. Smarter workflows. Full info in replies. ⬇️ @Google, @OpenAI, @TencentHunyuan, @BytedanceTalk