Litera Brings Claude Opus 4.8 and Sonnet 4.6 to Lito, the Award-Winning Legal AI Agent
AI now moves faster than any firm's technology roadmap. New frontier models arrive every few months, and clients expect their firms to keep up without ever compromising accuracy.
Litera is the platform that unifies the practice and business of law. Lito, Litera's award-winning Legal AI agent, runs on that foundation. That's why the models inside it arrive with the accuracy and governance firms already trust.
Those models are Claude Opus 4.8, Anthropic's most capable Opus-tier model, and Claude Sonnet 4.6, which delivers intelligence at speed. Both are generally available to all Lito customers, and firm leadership decides which models are available across the organization, so governance stays where it belongs.
What Are Claude Opus 4.8 and Sonnet 4.6?
Claude Opus 4.8 is Anthropic's most capable Opus-tier model for deep reasoning on complex work. Claude Sonnet 4.6 delivers near-frontier intelligence at the speed that high-volume work demands. That means cleaner first drafts and analysis that covers more ground in a single ask. Time returned to lawyers becomes time spent on the client relationships and new matters that grow the business.
How Does Lito Use Claude Opus 4.8 and Sonnet 4.6?
Lito uses Claude Opus 4.8 and Sonnet 4.6 across its chat and Studio experience. You choose your preferred model in Lito chat to work through documents, run contract review and redlining, and dig into complex matters. In Studio, you can build custom AI skills and multi-document review templates powered by either model, tuned to your specific matters and playbooks. Both run with the enterprise-grade security and governance firms expect, certified to ISO 27001 and SOC 2 Type 2.
What Other AI Models Are Available in Lito?
Lito also supports Claude Opus 4.7 and GPT models for chat, custom skills, and multi-document review templates.
Which Claude Model Should a Law Firm Use, Opus 4.8 or Sonnet 4.6?
It depends on the matter. Opus 4.8 handles complex, high-stakes matters where deep reasoning and judgment matter most: due diligence, multi-document analysis, and nuanced drafting. Sonnet 4.6 is the better fit for high-volume work where speed and consistency are the priority. Most firms will find both useful depending on the task, which is why Lito lets lawyers choose their preferred model directly in chat.
What Does This Mean for Your Firm’s Return on AI?
In a billable hour model, speed without growth doesn't move the needle. Litera defines RoAI across three dimensions: Efficiency Growth, Relationship Growth, and Business Growth. Because Lito runs on the platform that unifies the practice and business of law, time freed from repetitive work converts into deeper client relationships and new revenue. Any platform can add a new model. Lito runs it on legal infrastructure built over 30 years, which no AI-first entrant can shortcut. Where most platforms address one part of that equation, Litera moves all three.
How Do Law Firms Get Claude Opus 4.8 and Sonnet 4.6 in Lito?
Opus 4.8 and Sonnet 4.6 are available to all Lito customers today. Opus 4.8 also posted the highest score recorded on Anthropic's Legal Agent Benchmark, a benchmark that evaluates AI performance on the kind of complex, high-stakes work lawyers do every day. That performance sits on top of the deterministic accuracy Litera has refined across 30 years. Firms get frontier reasoning without giving up the reliability high-stakes work demands. Once enabled, lawyers choose their preferred model in Lito chat or build custom AI skills and multi-document review templates in Studio. Availability may vary by your organization's configuration and region. Contact your Litera account team to confirm access.
See Opus 4.8 and Sonnet 4.6 in action inside Lito. Explore Lito.
