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Show HN: Mediator.ai – Using Nash bargaining and LLMs to systematize fairness
A systematic, AI-powered negotiation tool that captures preferences via LLM interviews and uses a genetic algorithm to find fair agreements, addressing the difficulty of applying Nash bargaining in practice.
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AI Executive Synthesis
A systematic, AI-powered negotiation tool that captures preferences via LLM interviews and uses a genetic algorithm to find fair agreements, addressing the difficulty of applying Nash bargaining in practice.
Mediator.ai targets a complex, high-value problem: systematizing fair negotiation. By leveraging LLMs to capture preferences and a genetic algorithm for agreement generation, it addresses the practical limitations of Nash bargaining. This has significant B2B implications for legal tech, contract negotiation, dispute resolution, and complex procurement processes. The pain point is the lack of systematic, objective fairness in negotiations; the solution is an AI-driven framework that quantifies and optimizes for mutual satisfaction. This product exemplifies the trend of applying advanced AI and computational economics to traditionally human-intensive, subjective processes, offering potential for increased efficiency, transparency, and equitable outcomes in enterprise-level negotiations.
Eight years ago, my then-fiancée and I decided to get a prenup, so we hired a local mediator. The meetings were useful, but I felt there was no systematic process to produce a final agreement. So I started to think about this problem, and after a bit of research, I discovered the Nash bargaining solution.Yet if John Nash had solved negotiation in the 1950s, why did it seem like nobody was using it today? The issue was that Nash's solution required that each party to the negotiation provide a "utility function", which could take a set of deal terms and produce a utility number. But even experts have trouble producing such functions for non-trivial negotiations.A few years passed and LLMs appeared, and about a year ago I realized that while LLMs aren’t good at directly producing utility estimates, they are good at doing comparisons, and this can be used to estimate utilities of draft agreements.This is the basis for Mediator.ai, which I soft-launched over the weekend. Be interviewed by an LLM to capture your preferences and then invite the other party or parties to do the same. These preferences are then used as the fitness function for a genetic algorithm to find an agreement all parties are likely to agree to.An article with more technical detail: https://mediator.ai/blog/ai-negotiation-nash-bargaining/
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What is Mediator.ai – Using Nash bargaining and LLMs to systematize fairness?
Mediator.ai – Using Nash bargaining and LLMs to systematize fairness is analyzed by our AI as: A systematic, AI-powered negotiation tool that captures preferences via LLM interviews and uses a genetic algorithm to find fair agreements, addressing the difficulty of applying Nash bargaining in practice.. It focuses on Mediator.ai targets a complex, high-value problem: systematizing fair negotiation. By leveraging LLMs to capture preferences and a genetic algorith...
Where did Mediator.ai – Using Nash bargaining and LLMs to systematize fairness originate?
Data for Mediator.ai – Using Nash bargaining and LLMs to systematize fairness was aggregated directly from the Hacker News community ecosystem, representing raw developer and early-adopter sentiment.
When was Mediator.ai – Using Nash bargaining and LLMs to systematize fairness publicly launched?
The initial public indexing or launch date for Mediator.ai – Using Nash bargaining and LLMs to systematize fairness within our tracked developer communities was recorded on April 21, 2026.
How popular is Mediator.ai – Using Nash bargaining and LLMs to systematize fairness?
Mediator.ai – Using Nash bargaining and LLMs to systematize fairness has achieved measurable traction, logging over 105 traction score and facilitating 57 recorded discussions or engagements.
Which technical categories define Mediator.ai – Using Nash bargaining and LLMs to systematize fairness?
Based on metadata extraction, Mediator.ai – Using Nash bargaining and LLMs to systematize fairness is categorized under topics such as: Nash bargaining solution, LLMs, utility function, comparisons.
What are some commercial alternatives to Mediator.ai – Using Nash bargaining and LLMs to systematize fairness?
Our semantic intelligence engine identifies potential commercial alternatives in the SaaS space, such as Databerry, which offers overlapping value propositions.
How does the creator describe Mediator.ai – Using Nash bargaining and LLMs to systematize fairness?
The original author or development team describes the product as follows: "Eight years ago, my then-fiancée and I decided to get a prenup, so we hired a local mediator. The meetings were useful, but I felt there was no systematic process to produce a final agreement. So I..."
Community Voice & Feedback
The bakery example is interesting, because it's presented as "both sides have been working on this thing and think they should get 50%"... and then the _solution_ is "A path back to 50% for Daniel" -- who gets an objectively worse deal than his disputant.It's definitely an interesting application of LLMs, the output text to me reads very GPT-ey, with the punctuated and concise phrasing.
Interesting idea for sure. I am just thinking, intuitively couldn't I 'game' the mediator by overstating my preference and requirements to achieve a more favorable outcome?
I like the idea and signed up, but the first thing I see is a prompt to purchase credits. I don't have a use-case to try this now, so I won't be using the service again, however I couldn't find an account dashboard to delete my account or even sign out?
I think this is very useful. I wonder if you have people that actually used in difficult situations? maybe family separations or challenging stuff like that, where I see a lot of potential but also resistance.This said, I think the challenging part for the users is clearly setting the utility function. I agree LLMs can help there, but I have few concerns wrt that.
Great idea though I am skeptical it will be adopted in contentious situations without some sort of stick. In amorphous situations where there is just high trust but an aversion to talking things out I could see this kind of tool being used. But in contentious or low trust situations (strangers) I suspect most people do not want fairness, they want to be ahead. A fair agreement will, paradoxically, disappoint everyone since every party feels the lack of clear advantage.
Super interesting, thank you for sharing!I have published some research on using LLMs for mediation here: https://arxiv.org/abs/2307.16732 and https://arxiv.org/abs/2410.07053These papers describe the LLMediator, a platform that uses LLMs to:a) ensure a discussion maintains a positive tone by flagging and offering reformulated versions of messages that may derail the conversationb) suggest intervention messages that the mediator can use to intervene in the discussion and guide the parties toward a positive outcome.Overall, LLMs seem to be very good at these tasks, and even compared favourably to human-written interventions. Very excited about the potential of LLMs to lower the barrier to mediation, as it has a lot of potential to resolve disputes in a positive and collaborative manner.
This is so cool. Even small disputes like roommate arrangements can feel very emotionally impactful at the time and it would be wonderful to have a tool for these moments
This doesn't seem to have any notion of power? Coming up with a fair agreement between people who have equal power over the thing they care equally about, isn't that hard.But when one side is indifferent to something the other side cares deeply about, yet has veto power to spoil it, a Nash agreement isn't going to be "fair" in the usual sense of the word.
Feels like the tricky part here isn’t computing a “fair” outcome, but defining what fairness even means in the first place.Once you formalize preferences into something comparable, you’re already making a lot of assumptions about how people value outcomes.
Fabulous idea. LLM-assisted mediation is brilliant because it has the potential to bring the benefits of mediation to the masses. The addressable market is all of humanity. Even if all you did was focus this app on co-parenting arguments, you could help millions of people every day.
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