--quality changes how much time is spent generating your image. --q is the shortcut version. Please only use one of the values below. Any other value will be rounded to a valid value instead. --quality 0.25 Rough results, 4x faster / cheaper. -quality 0.5 Less detailed results but 2x faster / cheaper. --quality 1 The default value, you do not need to specify it. --quality 2 More detailed results, but 2x slower and 2x the price (2 GPU minutes per /imagine). --quality 5 Kind of experimental, might be more creative or detailed... also might be worse! (5 GPU minutes per /imagine).