OpenAI released GPT Image 2.6 Sunburst and Flare on November 4. Both accept low, medium and high in the Image API’s complexity field. The default is high. That field controls planning before rendering. The separate quality field controls the rendering quality.
Hold the other settings steady
Ask for a square sign with three lines: “Studio”, “Room 4” and “Quiet please”. Use the same model, prompt, size and explicit quality: medium in two requests. Set complexity to low for one and high for the other. Check your organization’s model access and the current image rates before running both requests.
Decide what improvement means
Mark whether each line is spelled correctly, appears in order and has clear margins. Record the time and the usage reported for each request. OpenAI lists no separate fee for changing complexity. Each generation still uses billable tokens. If the two images are equally usable, choose the setting that fits this job’s time and budget. Two outputs are a small sample, so test more examples before changing a production default.