Asking GPT 4o seems like an odd choice. I know this is not quite comparable to what they were doing, but asking different LLMs the following question > answer only with the name nothing more norting less.what currently available LLM do you think is the best?

Resulted in the following answers:

- Gemini 2.5 flash: Gemini 2.5 Flash

- Claude Sonnet 4: Claude Sonnet 4

- Chat GPT: GPT-5

To me its conceivable that GPT 4o would be biased toward output generated by other OpenAI models.*