From the source
Today, we're sharing early access results for GPT-5.
GPT-5.5 is OpenAI’s latest frontier model, building on the strengths of GPT-5.4 with improved substantive accuracy, stronger organizational structure, and more consistent formatting across legal practice areas.
This model is currently in research preview.
Early access evaluations show GPT-5.5 delivering gains across both transactional and litigation tasks, with particular strength in risk assessment, deal management, and analysis of litigation filings.
On our BigLaw Bench evaluation suite, GPT-5.5 scored 91.7%, up from GPT-5.4’s 91.0%.
This is one of the highest scores we’ve seen to date.
The model achieved 43% perfect scores and 87% of tasks scored above 0.80, with zero scores below 0.50.
Our teams highlighted several additional strengths.
GPT-5.5 showed notably improved output organization and readability, with evaluators praising its use of structured layouts.
On drafting tasks, evaluators noted that GPT-5.5 delivered outputs in proper format with intuitive structure, and the model made more effective use of bold headings and citations grounded in source documents.
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