# Harvey — GPT-5.5: Research Preview Results

- Company: Harvey (harvey.ai)
- Announced: 2026-04-23T18:00:00+00:00
- Category: not stated
- Coverage: not counted
- Announcement: yes
- Group: announcements
- Source: https://www.harvey.ai/blog/gpt-5-5-research-preview-results
- Record: https://forck.live/items/17578-gpt-5-5-research-preview-results
- Subject: Harvey

A first look at GPT-5.5 from Harvey. 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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