For my test I used screenshots to ensure no metadata.
I mentioned this in another comment but I was a part of an AI safety fellowship last year where we created a benchmark for LLMs ability to geolocate. The models were doing unbelievably well, even the bad open source ones, until we realized our image pipeline was including location data in the filename!
They're already way better than even last year.
https://cdn.jsdelivr.net/gh/sampatt/media@main/posts/2025-04...
Here's the model's response:
https://cdn.jsdelivr.net/gh/sampatt/media@main/posts/2025-04...
I don't think it needed the EXIF data. I'd be curious if you tried it again yourself.
Edit: An interesting nuance of modern OpenAI chat interface is the "access to all previous chats" element. When I attempted to test O4-mini using the same image -- I inspected the reasoning and spotted: "At first glance, the image looks like Ghana. Given the previous successful guess of Accra Ghana, let's start in that region".