Polygon Labs has upgraded Polygon Chain, the settlement layer at the core of its Open Money Stack, to support up to 5,000 payment transactions per second. The company says the throughput gain was achieved by raising the block gas limit to 160 million at 1.5-second block times, and that fees will remain low and predictable under peak load rather than scaling with volume.
The announcement positions Polygon Chain as a public blockchain rail operating at a throughput tier comparable to legacy card networks, at a fraction of their cost. For fintech and enterprise treasury teams, the critical claim is not raw speed but fee stability: the inability to model unit economics reliably at volume has been a persistent obstacle to moving production payment workloads onto public blockchain infrastructure.
Institutional traction and the stablecoin case
Polygon cited a run of institutional activity as context for the upgrade. In December 2025, Stripe launched USDC stablecoin payments on Polygon for merchants across more than 150 countries at a flat fee. Cash App and Meta are also reported users of the rail for payroll, remittances and cross-border settlement. Revolut crossed $1.2billion in onchain transactions on the network in May, and Polygon reported $79billion in total stablecoin volume that month, closing at a record $3.7billion in stablecoin supply. Polygon Labs also signed agreements earlier this year to acquire Coinme and Sequence, which the company says will bring licensed fiat on- and off-ramps and enterprise wallet infrastructure into the stack.
Marc Boiron, chief executive of Polygon Labs, said: “When fees spike at scale, you can’t build a real product on top of it. Polygon Chain now processes up to 5,000 payments per second at stable fees.”
The upgrade sits within Polygon’s Gigagas roadmap, a multi-phase engineering programme targeting throughput measured in billions of gas per second. Polygon says each phase maintains backward compatibility, so teams already building on the stack inherit capacity gains without contract migration.
Market context and regulatory read-across
The stablecoin payment infrastructure segment has become significantly more competitive over the past 18 months. Solana, Base and several purpose-built payment chains are each pursuing similar positioning around throughput and flat-fee settlement. The differentiating factors are beginning to shift from raw transaction speed to the surrounding institutional layer: fiat on- and off-ramp licences, compliance tooling, and the depth of processor and enterprise relationships.
Regulatory momentum is also relevant here. In the EU, the Markets in Crypto-Assets regulation provides a framework for stablecoin issuers and service providers, though its application to payment settlement rails remains an evolving area. In the US, stablecoin legislation has advanced through Congress in 2026, and the OCC has signalled greater comfort with banks engaging with blockchain settlement infrastructure. For enterprise finance teams evaluating public blockchain rails, the direction of travel on regulatory clarity is arguably as important as throughput benchmarks.
The AI payments angle introduced by Polygon, the idea that AI agents will generate continuous high-frequency transaction loads that unpredictable infrastructure cannot support, is a forward-looking framing that reflects a genuine structural question. If autonomous AI systems begin initiating payments at volume, the fee predictability argument becomes more commercially concrete. However, no live AI agent payment volume figures were provided in the announcement, and this use case remains speculative at this stage.
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