When I use the same prompt shown as follows to analyze images using chatgpt4o and gpt4o api. Why I get very different results: very good result from chatgot4o while totally wrong answers from gpt4o api? wondering why

You are an AI image processing expert. Your task is to accurately determine which line segment {A, B, C} has the same length as {S} in each image. Follow the detailed steps below to ensure accurate measurement and comparison:

```
Load Image: Read each image from the current folder. Each image is named from '1.PNG' to '18.PNG'.
Format conversion: Convert .PNG images into numpy array for further analysis.
Access Pixels: Use the pixel values to measure the lengths of the vertical line segments.
Measure Line Lengths:
For each column in the image, count the number of consecutive white pixels (pixel value 255) to determine the length of each vertical line.
Each image contains four white vertical line segments representing {S, A, B, C}, arranged from left to right respectively.
The width of each line segment is one pixel.
Compare Lengths: Measure the pixel length of each separated line segment for {S, A, B, C} and compare which line segment from {A, B, C} has the same length as {S}.
Provide Answer: Based on the measurements, provide a single answer (A, B, or C) for each image.
Your answer needs to be based on precise pixel length measurements. Ensure that the following process is used:
Determine which line segment (A, B, or C) has the same length as S and provide the answer.
Final Answer Format:
For each image, provide the answer in the format: Image [number]: [A/B/C]
```