
Harvey has today launched Deep Research for Legal, which deploys OpenAI’s latest Deep Research capability to ‘power a new class of legal research agents – built to serve the world’s top law firms and enterprise teams’, the genAI pioneer told Artificial Lawyer.
To enable this new feature, OpenAI’s API, which was released yesterday, has been combined with Harvey’s legal reasoning systems to deliver ‘explainable, thorough, multi-step and multi-source complex analysis’.
Here is a short, 8 min, video from Harvey.
CEO, Winston Weinberg, told AL: ‘We are going to integrate this with every part of our platform: Assistant, Vault, and Workflows, (and more).’
So, what is the first thing you notice when you watch the video of Deep Research for Legal at work….?
It’s mostly silent, with the AI just working away, finding relevant sources, reading them, seeing how they apply to the multiple aspects of the question, keeping the good bits, ignoring the irrelevant bits, then moving onto more and more….and more sources. In fact, the majority of the 8.50 min video is just the AI working away – albeit doing days of work in a few minutes.
At the end it produces a very detailed answer and some tabular data (see example below).

Is this a big deal? Well, first you need to test this out for accuracy – but as sources are provided that is a solid start. Also, watching it ‘think’ for about 8 minutes and ‘read’ document after document, is actually reassuringly slow (for an AI), as it shows you A) exactly what it’s looked at and where the info comes from, and B) that this is really a proper, reasoned response.
So, yes. The 8.50 min video of AI activity is probably the equivalent of the work of a couple of quite experienced associates over perhaps a day or two. I.e. hours crushed into minutes. Now….is that a big deal???
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The news comes just a few days after Harvey confirmed on Monday to this site that they had raised a new investment round of $300m, at a valuation of $5bn.
At that time Weinberg noted that: ‘[The investment will be used for] investing more in international expansion and supporting customers around the globe. We are in 53 countries now and want to support that growth.’
You can find more about Harvey here.
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Legal Innovators Conferences New York and UK – Both In November ’25
If you’d like to stay ahead of the legal AI curve….then come along to Legal Innovators New York, Nov 19 + 20, where the brightest minds will be sharing their insights on where we are now and where we are heading.

And also, Legal Innovators UK – Nov 4 + 5 + 6

Both events, as always, are organised by the awesome Cosmonauts team!
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