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Meta is building Arena, an AI-powered play-money prediction market app to challenge Polymarket and Kalshi

· by Pondero Newsdesk

The short version

Mark Zuckerberg directed a team to build Arena, a standalone app where users receive a daily virtual allotment of play money to bet on future events, with Llama handling question generation and market resolution.

Meta is building Arena, an AI-powered play-money prediction market app to challenge Polymarket and Kalshi

Meta CEO Mark Zuckerberg directed a team to build a standalone prediction market app called Arena, where users receive a daily virtual allotment of play money to bet on the outcome of real-world events. Internal documents reviewed by NPR and reported by TechCrunch on June 23 make Meta the largest Silicon Valley player yet to enter a sector some analysts project could become a $1 trillion industry.

What

Arena has been codenamed "Antwerp" and "FBForecast" internally, per the NPR documents. The app will be independent of Facebook, Instagram, and WhatsApp, though Meta plans to use those platforms to direct users toward it. No real money is involved at launch: users get a daily virtual allotment and bet on yes-or-no questions about future events.

The AI integration goes well beyond aesthetics. Per NPR's reporting on internal documents, Meta's Llama model will automatically generate questions from trending topics, make personalized market recommendations to each user, and resolve markets "in near real-time" rather than relying on human review. That AI-driven resolution is the architecture decision that separates Arena from prior attempts: Meta shuttered an earlier app called Forecast in 2022, citing "the operational cost of manual question curation." Arena is described in the documents as a "rebuild" of that effort.

A prototype will go through internal employee testing before a public launch for iPhone and Android. Meta declined to comment, and no release date has been set.

Why it matters

The play-money model is not just a product choice. It is a regulatory calculation. Gaming lawyer Daniel Wallach, quoted by NPR, called the current legal environment "clearly... legal limbo," pointing to more than 30 pending lawsuits over the legality of real-money prediction markets. Launching without real stakes buys Meta time to pursue a federal license from the CFTC and lets the contested legal landscape settle before any real-money functionality is added. TechCrunch noted that sources described the concept as "experimental but a top priority."

For operators who build on prediction-market data or run forecasting tools, Arena signals a structural shift. The incumbents, Kalshi and Polymarket, drew tens of billions of dollars in trading volume through April 2026 per Pew Research. Arena's play-money design does not compete for that capital directly. Instead, it competes for the attention and behavioral data that eventually converts into a real-money product. Meta's 3-billion-plus user base and its established referral infrastructure across Facebook, Instagram, and WhatsApp give it a distribution advantage no prediction market startup can match. X moved in this direction earlier, forging a Polymarket partnership in summer 2025.

Context and reactions

Markets read the announcement as a direct threat to incumbents. DraftKings and Robinhood shares dropped when the news became public. The Trump administration has backed prediction markets and begun the process of rewriting the federal rules that shunned them for decades, which makes the regulatory path less uncertain than it was two years ago. Even so, state attorneys general have sued prediction platforms over gambling law violations, and those cases remain unresolved.

Meta's prior prediction market work did not survive operationally. The 2020 Forecast app failed because curating questions manually was too expensive. Llama-powered auto-generation removes that bottleneck, which is the enabling technology that makes another attempt viable at scale.

What to watch next

Watch for a formal product announcement from Meta and for any CFTC signal on whether a play-money-only format keeps Arena outside the agency's jurisdiction. Polymarket and Kalshi have not commented publicly on Arena. Their response, and whether X deepens its Polymarket integration as a counter, are the near-term competitive signals to track.

Sources