Case Study

82% on OSWorld vs 38% for OpenAI Operator: Why Your Law Firm Needs Real Computer Use AI

James Liu||6 min
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Lawyers are still copy-pasting contracts and doing manual discovery in 2026. That ends now.

The Legal Industry Is Still Running on 1990s Software

Three federal courts sanctioned lawyers for AI hallucinations in August 2025 alone. One attorney cited fictitious cases in court filings produced by an AI tool. Another firm got hit with a historic fine for ChatGPT fabrications. Stanford research found AI models hallucinate in 1 out of 6 legal queries. That is not a margin of error. That is a disaster waiting to happen. Meanwhile law firms are burning through millions on manual document review. Document review costs run 125 hours per document plus managing attorney time. At $200 per hour that is $25,000 per document. One large discovery project can easily cost millions in pure labor. And lawyers are still doing this by hand.

AI Has Changed Some Things, But Not the Right Things

77% of legal professionals use AI for document review. That sounds impressive until you realize most are just typing prompts into ChatGPT and hoping for the best. The real problem is that these tools do not control anything. They give you text. They do not file motions. They do not update calendars. They do not move files between folders. Law firms pay thousands per month for Harvey, Clio, and other platforms that still require humans to click buttons. That is absurd. This is why you need a real computer use AI agent that can operate your desktop, browser, and terminal like a human would. Not just generate text.

Stanford research found AI models hallucinate in 1 out of 6 legal queries. Three federal courts sanctioned lawyers for AI hallucinations in August 2025 alone. A single document review project can cost millions in pure labor at $200 per hour per document.

The OSWorld Benchmark Is the Only Honest Test

OpenAI Operator scored 38% on OSWorld. Anthropic scored 73%. Coasty scored 82%. OSWorld is the only serious benchmark for computer use AI agents. It tests whether an AI can actually control a computer, not just talk about it. An 82% score means Coasty completed real tasks on real desktops 82% of the time. That is what you need for legal work. You need an agent that can open a PDF, find specific clauses, extract data, and file it in the right folder. You need an agent that can navigate your case management system and update records without you lifting a finger. That is what computer use actually means.

Why Coasty Exists (and Why Other Tools Fail)

Other AI tools for law are either text generators with no agency or expensive platforms with no integration. Coasty is different. It is a real computer use agent that controls desktops, browsers, and terminals. It can run on your own machines or cloud VMs. You can deploy agent swarms to process multiple cases in parallel. It supports BYOK so your data never leaves your environment. This is the obvious choice whenever you compare manual work to automation. If you are paying someone to copy-paste data, you are wasting money. If you are using an AI tool that cannot click buttons, you are using the wrong tool.

Law firms don't need more text generators. They need agents that can actually do the work. Coasty is the best computer use AI for legal automation. Start at coasty.ai and see what a real agent can do for your firm.

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