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What Claude offers lawyers and law firms in 2026: which plan to buy, how client data is handled, Claude for Legal plugins, Cowork and Claude's limits.
Gavel Exec reviews, redlines and drafts contracts inside Microsoft Word, checked against your own playbooks. Start with 25 free queries, no credit card required.
Claude for lawyers means using Anthropic's general artificial intelligence (AI) assistant on legal work: first drafts, summaries, contract review and research support, in a chat window, in Microsoft Word or through the Cowork desktop agent. For client files, the plans to consider are Team and Enterprise, where Anthropic does not train on content by default.
Last checked November 13, 2026, against Anthropic's pricing, help, privacy and developer pages. Gavel publishes this guide and makes Gavel Exec, AI contract review and drafting software for Word. Relativity, listed below as a Claude connector, announced its acquisition of Gavel in June 2026.
Yes, if the plan and its settings meet your confidentiality duty and a lawyer reviews everything Claude produces. Claude is a general-purpose model with no legal research database of its own, so it works from the documents you supply, the open web or a connected legal tool.
Claude runs as a chat app on the web, desktop and mobile, with Projects that keep precedents and prior drafts on hand. Paid plans add Word, Excel, PowerPoint and Outlook add-ins, the Cowork agent and Claude Code. Some legal tools already run on Anthropic's technology: LawNext reports that Thomson Reuters rebuilt CoCounsel Legal on it. Our guide to the best AI contract review tools for lawyers compares the legal-specific options.
Most small and mid-sized firms belong on Team, which costs $20 per seat per month billed annually or $25 monthly and keeps your content out of training by default. Firms that need audit logs, custom retention periods or a Health Insurance Portability and Accountability Act (HIPAA) offering need Enterprise.
| Plan | Price | Seats | Training on your content | Notable features |
|---|---|---|---|---|
| Free | $0 | 1 user | Used for training unless you opt out | Chat, memory and connectors; no Microsoft 365 add-ins |
| Pro | $17 per month billed annually ($200 up front), or $20 monthly | 1 user | Used for training unless you opt out | Claude Code, Cowork and Claude for Microsoft 365 |
| Max | $100 per month, monthly billing only | 1 user | Used for training unless you opt out | Five times Pro usage |
| Ultra | $200 per month, monthly billing only | 1 user | Used for training unless you opt out | Ten times Pro weekly usage |
| Team Standard | $20 per seat per month billed annually, or $25 monthly | 2 to 150 seats | None by default | Single sign-on, central billing and Cowork |
| Team Premium | $100 per seat per month billed annually, or $125 monthly | Mixed with Standard seats, 2 to 150 in total | None by default | Five times Standard seat usage |
| Enterprise | $20 per seat per month billed annually, plus usage at API rates | 20-seat minimum | None by default | Audit logs, Compliance API, custom data retention and a HIPAA-ready offering |
A five-lawyer firm on Team Standard pays $1,200 a year on annual billing or $1,500 paying monthly. Enterprise starts at $400 a month in seat fees for the 20-seat minimum, before usage billed at API rates.
A solo lawyer can buy two Team Standard seats for $40 a month on annual billing to get the commercial data terms. Pro costs less, but it is a consumer plan with training on unless you turn it off.
On Team, Enterprise and the API, Anthropic says it will not use your inputs or outputs to train models by default. On Free, Pro, Max and Ultra, your chats can be used to improve Claude if the model improvement setting is on. For tools that learn from their inputs, Opinion 512 makes the client's informed consent a precondition.
Anthropic's consumer retention article says that with model improvement on, it may keep data in de-identified form for up to five years. Deleted conversations leave its back-end storage within 30 days, and chats flagged by its safety systems are kept for up to two years.
Feedback is the exception on every plan. Anthropic's commercial training article says a thumbs up or down can be used for training and stores the whole conversation for up to five years, so tell lawyers not to rate responses on client matters.
Under zero data retention (ZDR), Anthropic does not store prompts or responses at rest after the API returns its answer. Its API and data retention documentation offers ZDR on eligible API endpoints and lists the Team and Enterprise product interfaces as ineligible, apart from a separate ZDR offering for Claude Code on Enterprise.
The same page lists the Claude Fable and Mythos models as Covered Models that require 30-day retention and are unavailable under ZDR unless Anthropic expressly authorizes it.
The ABA issued Formal Opinion 512 on July 29, 2024. For self-learning generative AI (GAI) tools, it says "a client's informed consent is required prior to inputting information relating to the representation into such a GAI tool." It adds that "merely adding general, boiler-plate provisions to engagement letters purporting to authorize the lawyer to use GAI is not sufficient."
The opinion also keeps the competence duty on the lawyer, so output has to be checked before anyone relies on it. On fees, lawyers "may not charge clients for time necessitated by their own inexperience" with a tool. State bars add their own rules, which our 50-state survey of AI regulation tracks.
Claude for Legal is the legal package Anthropic announced on May 12, 2026: 12 practice-area plugins and more than 20 connectors that let Claude work inside legal software. The plugins are open source under the Apache 2.0 license in the anthropics/claude-for-legal repository and run in Cowork, Claude Code, the Microsoft 365 add-ins and the Claude Managed Agents API.
Nine plugins cover practice areas (litigation, commercial, corporate, employment, privacy, regulatory, product, intellectual property and AI governance), and three serve legal clinics, law students and community skills. The corporate plugin, for example, handles mergers and acquisitions diligence, closing checklists and board consents.
Each plugin opens with a setup interview of 10 to 20 minutes that asks how your practice works and for seed documents such as a playbook or a signed agreement, then saves a practice profile the plugin reuses.
According to LawNext's launch coverage, the connectors include:
Connectors marked as customer subscriptions in the repository need your firm's own account with that vendor, and Anthropic's announcement describes results scoped to each user's existing permissions in tools such as Ironclad and Box. Anthropic publishes no separate price, and qualifying legal aid groups and public defenders can get discounts through Claude for Nonprofits.
The repository is candid about limits. It says "Every output from these plugins is a draft for attorney review" and that the plugins "do not represent Anthropic's legal positions." Citations that come from the model's own knowledge, without a connected research tool, are flagged for verification.
Firms lean on Claude for first drafts, summaries of long documents, clause review against stated positions and issue framing that a lawyer then checks. That work happens in chat with Projects, in the Cowork agent and in Claude for Word, with Claude for Legal plugins layered on top.
A Project can hold your form agreements, a house style memo and the matter documents, so each conversation starts with that context. Typical tasks are a client letter, a deposition summary, an issues list for a term sheet or a clause rewritten to match your form.
Anthropic's Cowork help article says it uses the same agentic architecture as Claude Code without a terminal, working through folders and tools you grant it. It is available on Pro, Max, Ultra, Team and Enterprise, and Anthropic says legal professionals have become "the most engaged Claude Cowork users of any knowledge-work function."
Anthropic's Team and Enterprise article says Cowork sessions are captured in the Compliance API, while admins cannot centrally manage or delete local sessions. For organizations with HIPAA enabled, Cowork is off by default, and without the required configuration it "is available but not covered under your BAA," meaning the business associate agreement.
Claude for Word edits documents in tracked changes mode and replies to comment threads with a note on what it changed. Anthropic's product page calls it generally available on all paid plans, while its help center article still calls it a beta on Pro, Max, Team and Enterprise and lists "Final client deliverables or counterparty sends without human review" as a use to avoid.
That article also says inputs and outputs are deleted within 30 days and the add-in is not yet in Enterprise audit logs or the Compliance API. Setup, versions and tested results are in our full review of Claude for Word for lawyers.
Claude models rank at or near the top of Vals AI's public legal benchmarks, but the Claude app has no citator and can get citation details wrong. Use it to frame issues and read sources you provide or retrieve through a research connector, and pull every authority yourself before you rely on it.
On LegalBench (updated October 13, 2026), Claude Fable 5 ranks first at 88.56%. On Legal Research Bench (updated November 11, 2026), Gemini 4 Carbon leads at 55.77%, with Claude Opus 5 and Claude Fable 5.1 among three models tied for second at 55.29%. That second benchmark gives each model CourtListener and web search tools, counts an answer only if every rubric item passes, and scores 208 test questions, so even the leader failed about 44% of them.
Courts have seen the failure mode. In Mata v. Avianca, Judge P. Kevin Castel of the Southern District of New York imposed a $5,000 sanction on June 22, 2023, over opinions ChatGPT invented. In May 2025, in Concord Music Group v. Anthropic, Magistrate Judge Susan van Keulen struck part of an expert declaration after Anthropic's own counsel used Claude to format a citation and it supplied the wrong title and authors.
See our analysis of AI hallucination rates in legal work, and our comparison of ChatGPT and Claude for lawyers for benchmark, price and privacy differences between the two.
Claude's main limits for lawyers are verification, consistency and compliance coverage. It does not check citations against a legal database, has no market data on deal terms, and some newer surfaces sit outside its audit tools.
Prompt quality also moves results; see our guide to writing better prompts for legal AI.
Add one when the same standard has to be applied to every document of a type, when you need market benchmarks or a verified research database, or when clients expect contractual zero data retention in daily use. Claude can keep handling general drafting and summaries alongside it.
Ask three questions. Do your lawyers review the same contract types against the same positions every week? Do clients ask whether a term is market? Do outside counsel guidelines ask about retention by the model provider? Our list of security questions to ask legal AI vendors helps with the third.
Gavel Exec is built for transactional lawyers who need one playbook applied to every contract and a full redline in Word. It reviews an entire agreement and returns priority-ranked tracked changes with the reasoning for each change, along with margin comments and a list of missing terms.
The built-in playbooks were developed with attorneys in corporate and real estate law, and a firm can also generate playbooks from its own checklist or signed agreements. The web app labels each provision on-market, off-market or missing, filterable by jurisdiction, industry and company size.
Gavel Exec runs on models from AI providers, including OpenAI, under Zero Data Retention agreements, and customer data is not used to train AI models. It is System and Organization Controls (SOC) 2 Type II certified. Pricing is $160 per user per month or $1,740 per user per year, and each user gets 25 free queries with no credit card.
Gavel Exec is built for transactional work, has no case-law research database, is not designed for litigation or e-discovery, and has no native iManage or NetDocuments integration today. For a feature-by-feature view, see our head-to-head comparison of Claude for Word and Gavel Exec.
Is Claude safe for confidential client information?
On Team, Enterprise and the API, Anthropic does not use your inputs or outputs for training by default, and deleted chats leave its back-end storage within 30 days. Zero data retention is offered on eligible API endpoints and is unavailable in the Team and Enterprise product interfaces, so read the terms for your plan and get informed client consent where ABA Formal Opinion 512 calls for it.
How much does Claude cost for a law firm?
Team Standard costs $20 per seat per month billed annually or $25 billed monthly, with a two-seat minimum. Enterprise costs $20 per seat per month billed annually plus usage at API rates, with a 20-seat minimum.
Is Claude for Legal free?
Anthropic publishes no separate price for Claude for Legal. The plugins are open source and run on paid Claude plans, and qualifying legal aid groups and public defenders can get discounted pricing through Claude for Nonprofits.
Can Claude do legal research?
Claude can frame issues, read the sources you give it and search through connectors such as CourtListener, Midpage, Trellis and CoCounsel Legal. Pull and read every authority it cites, because Claude has produced wrong citation details in a federal court filing.
Does Claude work in Microsoft Word?
Yes. Claude for Word edits in tracked changes mode and replies to comment threads on paid plans, and Anthropic's help center advises against sending final client deliverables without human review.
What is the difference between Claude and Gavel Exec?
Claude is a general AI assistant that a firm can configure for legal work. Gavel Exec is AI contract review software that applies built-in or custom playbooks to whole agreements in Word as priority-ranked tracked changes with reasoning, at $160 per user per month.
Related reading: which AI model is right for your law firm, ChatGPT alternatives for lawyers and how Gavel secures client data.
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