GPT-5.6 Sol, Now Live in :Harvey:

GPT-5.6 Sol, OpenAI's latest model in the GPT-5 series, is now available in Harvey.

On BigLaw Bench, GPT-5.6 Sol scored 92.7%, a step up from GPT-5.5’s 91.7%, with perfect performance across risk assessment & compliance and deal management. There were also strong results across document review and analysis, drafting, and case management. These are high-volume legal workflows where reliable accuracy compounds into real time savings.

On LAB, which is graded on a stricter all-pass basis, GPT-5.6 Sol scored 2.5%, showing there is room to improve on end-to-end task completion. Additionally, early testing showed opportunities for growth in certain categories like regulatory and advising, transcript analysis, and transaction structuring — areas that tend to be challenging for frontier models.

GPT-5.6 Sol will be available in Harvey to US customers starting this week, with EU and AU availability to be announced.