Release Notes
New Models: Opus 5.5, Sonnet 5.5, GPT-6.1 Sol, GPT-6 Sol, GPT-6 Luna
Several new models are now available in Harvey.
Release Date
Oct 14, 2026
Categories
Model Updates
General Availability Access
Regional Availability
US, EU, AU
What’s New
Several new models from OpenAI and Anthropic are now available in Harvey:
- Opus 5.5
- Sonnet 5.5
- GPT-6.1 Sol
- GPT-6 Sol
- GPT-6 Luna (available only for review tables)
Why It Matters
These models expand your access to high-quality legal AI across a wider range of tasks, from complex analysis and drafting to faster, more cost-efficient everyday work.
How To Use
Note: The following models are not available in the AU at this time: GPT-6.1 Sol, GPT-6 Sol, and GPT-6 Luna. Refer to our model comparison table for the full list of available models by region.
Select a Model
In a Harvey thread, open the Model Selector and a choose a model from the list.
Admin Controls
- Admins can modify the set of models available in the workspace through the Command Center.
- Model selector access can be modified by role from the Roles page.