一句话摘要
GPT-image-1 新增 input_fidelity 参数和部分图像流式输出，提升编辑控制和用户体验。
详细描述
GPT-image-1 preview update: new input_fidelity parameter controls style/feature preservation in edits; partial image streaming returns partially rendered images during generation for earlier visual feedback.
原文摘录
The input_fidelity parameter in the image edits API lets you control how closely the model conveys the style and features of the subjects in the original (input) image. Partial image streaming returns images with partially rendered content throughout the image generation process.