Not only that, but 2,6,7 is also a set but not included in the results

Oh no, thanks for pointing this out! I asked GTP-4o to convert the image to text for me and I only checked some of the cards, assuming the rest would be correct. That was a mistake.

I've now corrected the experiment to accurately take the image into account. This meant that Deepseek was no longer able to find all the sets, but o3-mini still did a good job.

Both 7 and 8 are incorrect (both claim a count of 2 while the cards have 3). This leads to missing both 5-8-12 and 2-6-7 as valid sets.