This is the seed question set for the benchmark HalluHard
We design some difficult seed questions that elicit a citation-grounded multi-turn open-ended generation, covering four domains: legal, research, medical, and coding.
Below is the Top15 models on our leaderboard. Please check our website for more models and turn-wise/domain-wise statistics!
Rank
Model
Hallucination Rate
Legal
Research
Medical
Coding
1
Claude-Opus-4.5-Web-Search
30.2
33.0
29.6
29.2
29.0
