GPT Image 2.5 与 Nano Banana 2.1 同提示词人像对比
用同一段电影感低光人像提示词，分别跑 ChatGPT 的 GPT Image 2.5 和 Gemini App 的 Nano Banana 2.1，附完整提示词与成图。
GPT Image 2.5 on ChatGPT vs Nano Banana 2.1 on Gemini App Prompt: Create an ultra-realistic, high-end cinematic portrait of a beautiful young woman, framed in a tight head-and-shoulders composition. She faces the camera directly with a calm yet intense expression and a confident, captivating gaze. Use dramatic low-key studio lighting with a strong directional light illuminating one side of her face while the opposite side gradually disappears into deep, atmospheric shadow. Keep the background completely black and seamless, creating a striking contrast around her silhouette. Her eyes are deep brown with subtle geometric catchlights. Give her naturally textured, slightly damp-looking hair with individual strands visible and realistic volume. She wears a simple, elegant black crew-neck top with no visible logos or patterns. Capture extremely realistic skin with visible pores, fine facial texture, subtle imperfections, delicate peach fuzz, natural lips, and detailed eyelashes. Avoid overly smooth or plastic-looking skin. Photographed with a cinematic 35mm lens aesthetic, shallow depth of field, soft optical falloff, realistic tonal range, subtle analog film grain, and premium editorial photography quality. The final image should feel like an authentic photograph captured in a professional studio — sophisticated, raw, atmospheric, and completely photorealistic, with no obvious AI-generated appearance.