HealthBench Hard (length-adjusted)
Professional Work · 2026-04-23
HealthBench Hard with the published length adjustment applied: responses of 2,000 characters receive no adjustment, longer responses are penalised 3.92 points per additional 500 characters on the 0-100 scale, and shorter responses receive the corresponding credit. OpenAI reports this alongside the unadjusted score from the GPT-5.5 system card onward. Recorded as a diagnostic so that models are not entered twice under two readings of one run.