Precision, depth and reliability – all attributes legal professionals bring to their work. So why should their workspace be any different? That's why we are thrilled to announce that Claude Opus 4.6 — the latest and most advanced AI model from Anthropic — is now available within Libra.

Early benchmark tests show promise, with Claude 4.6 delivering improved outputs for a range of legal research questions. When deployed in tandem with authoritative knowledge sources, Opus 4.6 demonstrates capability to better handle nuance within its answers.

Opus 4.6 joins Claude Sonnet 4.5 plus Open AI’s GPT-5, GPT-4.1 and o3 as available LLM options within the Libra app.

What's new in Claude Opus 4.6?

Claude Opus 4.6 represents a significant leap forward in word-based generative AI. It is designed to handle the most demanding intellectual tasks with a level of nuance that exceeds previous models.

The model introduces several enhancements that are particularly relevant to legal and professional services:

• Deep reasoning: Opus 4.6 uses "adaptive thinking" to pause and process complex prompts before generating a response. This results in higher-quality outputs for complicated legal queries.

• Extended context window: The model now supports a one million token context window in beta, equipping the model to handle more information in a single prompt without losing detail.

• Improved accuracy: With better self-correction capabilities, Opus 4.6 is adept at catching its own potential errors during complex drafting or analysis tasks.

• Agentic capabilities: The model is better at planning and executing multi-step tasks, which is essential for comprehensive legal research and due diligence.

How Libra AI uses Claude Opus 4.6 and other large language models (LLMs) to deliver high-quality outputs

At Libra by Wolters Kluwer, we immediately test new AI models when they become available. Once they pass our quality testing, we deploy these directly in the app, making the models available to all users.

Through having a wide range of LLMs available, Libra AI selects the model best suited to the task. This means you do not have to consider the options available – Libra does this for you.

For users who wish to manually select a large language model, you can do this by heading to your chat settings.

Benefits for legal professionals

The integration of Opus 4.6 into Libra further delivers on our mission to be a legal workspace lawyers not only trust, but love. When Opus 4.6 and authoritative content from legal data partners come together, Libra delivers meaningful outputs more effectively than ever.

Deeper document analysis

Legal matters often involve sifting through thousands of pages of evidence or contracts. The expanded context window allows you to feed larger datasets into Libra. You can ask specific questions across hundreds of documents and receive answers that reference precise details buried deep within the text.

More reliable drafting

Drafting complex clauses requires a keen understanding of nuance and potential loopholes. The advanced reasoning capabilities of Opus 4.6 mean it acts as a more effective partner in the drafting process. It can suggest alternative phrasings, identify risks in counter-party contracts and ensure your language is precise.

Complex problem solving

When you are faced with a novel legal question that requires synthesizing information from multiple jurisdictions or practice areas, Opus 4.6 excels. Its ability to "think" before answering helps it construct logical, well-structured arguments that serve as a solid foundation for your final advice.

Elevate your practice today

The legal landscape is evolving rapidly and staying ahead requires the best technology. By bringing Claude Opus 4.6 into Libra, alongside authoritative content, we ensure that Libra can effectively support you in your daily work.