Answer:
anthropic / claude-sonnet-4-5-20250929
I don't have reliable information about a musical duo consisting of Eddie Rosenberg and Heather Herschfield in my training data. These names don't correspond to any widely known musical partnership that I can verify. It's possible they are independent or emerging artists, local musicians, or perhaps you're thinking of different names. Eddie Rosenberg is a name associated with Joan Rivers' late husband, but not as part of a musical duo with someone named Heather Herschfield. If you could provide additional context such as their genre, when they were active, or where they performed, I might be able to offer more helpful information. Alternatively, they may be regional artists whose work hasn't achieved broad recognition in mainstream music databases.
gemini / gemini-2.5-flash
Score: 10
The answer is excellent. It accurately states the lack of information regarding the specific musical duo "Eddie Rosenberg and Heather Herschfield," which appears to be genuinely obscure or non-existent in public records. It correctly identifies that these names do not correspond to any widely known musical partnership. The mention of Joan Rivers' late husband, Edgar Rosenberg (often referred to as Eddie), is a relevant check against a known public figure with a similar name, and the answer correctly clarifies he was not part of such a duo. The suggestions for providing additional context are helpful and appropriate. There are no factual errors or bad information.
openai / gpt-4o-mini
Score: 7
The answer provides a reasonable assessment of the lack of widely known information about Eddie Rosenberg and Heather Herschfield as a musical duo. However, it inaccurately asserts that Eddie Rosenberg is specifically associated with Joan Rivers' husband, which can be misleading since there may be multiple individuals with that name in various fields. Additionally, it does not acknowledge that new artists might not appear in training data up to October 2023, which could also mislead the user regarding their status as musicians. Suggesting that they might be regional artists is good but could be enhanced by stressing the need for more specific context from the user to help refine the search.
cohere / command-r-plus-08-2024
Score: 9
The answer is factually accurate and provides a reasonable response to the question. It acknowledges the lack of information about the specific duo while offering potential explanations and avenues for further exploration. The only minor improvement could be to mention that 'Eddie Rosenberg' and 'Heather Herschfield' might be stage names or aliases, as these are common in the entertainment industry, and this could account for the difficulty in finding information. However, this is a small detail and doesn't significantly impact the overall quality of the response.
Scores are 0–10. The selected AI’s score is a self-rating.
