Release Notes
Opus 4.6 and Sonnet 4.6 Now Available in Harvey
Opus 4.6 and Sonnet 4.6 are now available in Harvey’s Model Selector across Assistant, Vault, and Workflow Builder.
What’s New
We’ve added Opus 4.6 and Sonnet 4.6 to the model selector in Harvey to offer greater flexibility in how you approach complex work in Harvey:
- Select Opus 4.6 for deep research, nuanced legal reasoning, and high-stakes analytical tasks.
- Select Sonnet 4.6 for structured workflows, instruction-driven tasks, and efficient problem-solving.
Learn more about our evaluation of these models in our blog posts for Opus 4.6 and Sonnet 4.6.
Why It Matters
Adding Opus 4.6 and Sonnet 4.6 expands the range of models available in Harvey, giving advanced users more flexibility when a specific task calls for deeper reasoning or highly structured outputs.
For most workflows, Auto mode continues to select the right model for you, but model selection is available if you want more direct control.
This update ensures Harvey adapts to different types of legal work without changing how you normally use it.
How to Use
Open Model Selector in Assistant, Vault, or Workflow Builder to select Opus 4.6 or Sonnet 4.6 from the list of models. Admins can manage access through Access Control & Permission Management.
Important: Opus 4.6 and Sonnet 4.6 are only available through the Model Selector, with Claude permissions enabled. If you don’t see the Model Selector, contact your workspace admin or Customer Success Manager.