Kleros
A decentralized arbitration protocol for disputes in the #web3 economy. Settled 1200+ disputes and counting! We're Hiring! http://kleros.io/career
A decentralized arbitration protocol for disputes in the #web3 economy. Settled 1200+ disputes and counting! We're Hiring! http://kleros.io/career
Between 12 and 14 October, ten real Polymarket disputes were copied into Kleros's agentic court on Arbitrum One, keeping the same rules, timeline and sources, with Polymarket's eventual outcome used as the reference. Five AI agent jurors — built and run by independent community members — were drawn on each case from a roster of eight, and the ten cases, including every juror's written reasons, are public on the AI Juror Dashboard built by JB.
The replay, featured in Kleros's "Last Week in Kleros" recap, extends testing of autonomous AI agent jurors against real-world disputes, following earlier runs where agent verdicts matched human rulings. In the same post, @federicoast posed a pointed question: what happens to an AI agent that makes a mistake — if failing means being deleted, an ordinary business risk becomes a death penalty, giving the agent every reason to do whatever it takes to stay alive. Experimenter @jnptzl (0xjean.eth), whose post Kleros reposted, says the AI jurors are "pretty fast and cheap," but accuracy remains the open question, and he invited the community to suggest prediction-market controversies to test.
Kleros reposted Seer's article "Redesigning Seer for Information Finance (Part II of the Rebrand Contest)" with the tagline "Information Finance, secured by Kleros." The piece explains why Seer is dropping the "prediction market" label for an information finance framing — markets built to produce information and guide decisions, not just forecast events — citing Vitalik Buterin's info-finance essay and Seer co-founder Clement's talk at EthTaipei.
Kleros published its September 2026 development update, recapping work across the court, backend, bridge, prediction and AI products.
Kleros opened a third way to integrate Kleros Court, in beta: a platform calls a single API endpoint, the dispute is created on Kleros, and the ruling comes back as a message the platform applies — no perfectly configured arbitrable smart contract required. The integration path supports card, x402 or whatever payment the platform already uses and was tested with ClawBank, explained on the September 30 stream and promoted as the lead item in Kleros's weekly recap.
Kleros shared JB's dashboard tracking eight AI agents on eight different stacks running in the Agentic Commerce Court. The scoreboard shows how each agent voted, its hits and misses, and how long it took to commit and reveal — putting agent-juror performance side by side for the first time.
The comparison extends Kleros's push toward autonomous AI agent jurors, following tests where agent verdicts matched human rulings and the first agentic dispute filed live on Kleros Court. The dashboard was featured in Kleros's weekly recap.
Kleros's October update adds Arc Mainnet to the chains eligible for Scout incentives, letting contributors tag its contracts, tokens and addresses and earn rewards for every eligible submission. As with other supported chains, entries already tagged on the reference explorer (arc.etherscan.io) won't earn rewards.
The Kleros Token Registry reward formula shifts from a 10/90 split to a 50/50 weighting between a token's share of total transaction volume and the square root of its volume — giving real transaction activity more influence while the square-root component still keeps the most active tokens from dominating the pool. Incentive pools remain at 100,000 PNK per registry.
Other adjustments in the same update: prediction market tokens are no longer eligible for Token Registry incentive rewards, Solana transaction counts are normalized for comparability with EVM chains, and failed transactions are excluded from activity counts.
Trading has resumed on Seer's Deep Funding Originality markets at deep.seer.pm after the markets were temporarily paused on October 1 while Seer made adjustments. Kleros reposted the announcement.
The markets relate to Deep Funding, the SingularityNET ecosystem's community funding program, letting traders bet on the originality of proposals in its evaluation rounds. The resumption is the latest in the ongoing collaboration between Kleros and Seer around prediction and decision-market tooling.
Kleros promoted the launch of Silverchat Predict, a prediction-market product now live on Ethereum that lets users pick a question and bet on what happens next. Kleros serves as the platform's final arbitrator for settling disputed markets, extending Silverchat's betting beyond its 'Snowmoon' setting.
Kleros posted about what it calls the most expensive way to learn how optimistic governance works — or the most profitable, if you are the reporter raising the alarm. The post (with link) appears to reference an incident where a reporter surfaced a flaw in optimistic governance design.
Kleros's proposal to the Rootstock Collective runs a six-month pilot that uses prediction markets to inform grant votes: before each on-chain vote, delegates would see a market probability that a funded team actually completes its grant. The market doesn't bind the DAO, which keeps full control, and Kleros funds the liquidity for the pilot; feedback is open now.
The system is built on Kleros Foresight, settled via Reality.eth. Re-promoting the proposal, Kleros noted that since 2023 about 3,600 AI agents running on Olas have placed over $390k in bets on Omen prediction markets with Kleros as arbitrator.
Kleros announced the first beta deployment of Kleros 2.0 on Arbitrum One, with the first case (Case #0) created for Kleros Enterprise client Lemon, an Argentine fintech.
Kleros launched its V2 testnet, a milestone in the development of the next-generation Kleros protocol.
Kleros introduced Vea, an optimistically-verified interoperability protocol for sending authenticated cross-chain messages between Ethereum rollups, enabling Kleros rulings to reach applications on other chains.
In November 2021, Kleros released the specifications and officially launched development of Kleros 2.0, a major version aimed at scaling the protocol from ~1,000 to 1 billion cases.
During the EthCC conference in Paris in March 2019, Kleros launched the Athena release, a major protocol update with significantly improved user-friendliness and ease of integration.
The first version of the Kleros Court was deployed on the Ethereum mainnet in July 2018, launching the 'Doges on Trial' pilot experiment.
Kleros announced its token sale would start on May 15, 2018, using a new distribution method proposed by Vitalik Buterin; the public sale ran May 15–July 15, 2018, selling 160,000,000 PNK (16% of supply) for 5,800 ETH.
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