From the source
Harvey made GPT-5.1,
OpenAI's newest frontier model, available to eligible clients in the US and EU via the model selector over the next 24 hours.
The model was trained with an emphasis on dynamic thinking times and improvements in formatting, style, and personality.
On Harvey's BigLaw Bench evaluation suite, GPT-5.1 achieved a score of 91.8%, the highest yet for the GPT family of models.
