• Cardano prepares for a major scalability leap with the Ouroboros Leios upgrade.
• The new ‘follow the sun’ model speeds up development through global teamwork.
• Leios aims to increase network throughput by up to 65 times while maintaining security and decentralization.

Cardano is gearing up for one of the largest technological hops with the Ouroboros Leios upgrade, a scalability-oriented improvement that may restructure the potential of proof-of-stake blockchains.

Created through the CIP-0164 proposal, Leios is created to boost throughput by an estimated 30 to 65 times that of the current Ouroboros Praos mechanism.

Cardano is preparing for a transformative scalability upgrade: Ouroboros Leios. Its development is accelerated by a ‘follow the sun’ model, where global teams collaborate across time zones.

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— Input | Output (@InputOutputHK) October 9, 2025

The update features a dual-block design, regular Praos blocks, and larger secondary blocks with extra transactions. 

Those supplemental blocks would become committee-confirmed prior to being incorporated into the ledger, achieving a more normalized and streamlined transaction stream.

In the estimation of Input Output (IO) engineers, that design is destined to relieve congestion while preserving Cardano’s recourse backdating.

Beyond technical objectives, Leios displays how Cardano’s community-driven development architecture has matured.

It is more than a protocol upgrade; it is proof of the capability of a global blockchain community to come together and bring complex ideas to life quickly, faster than they were even previously.

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The 24/7 ‘Follow the Sun’ Model Accelerates Progress

The Leios project operates on an uncommon ‘follow the sun’ development pattern, in that local teams in various regions operate constantly through time zones.

While one team finishes their local workday, another continues in exacting, with development in active motion constantly around the clock.

This framework shortens timeframes for delivery and enables simultaneous going of many facets, research, test, and implementation, in parallel.

It also inspired Input Output Engineering (IOE) to rethink the internal workings of their organization, more efficiently and transparently streamlining their software development life-cycle.

Every world team shares new code and solutions, contributing their diverse perspectives to shared problems. The result is rapid innovation while maintaining no qualms about coordination or quality, a blockchain engineering rarity.

Broad Impact Across the Cardano Ecosystem

The Ouroboros Leios upgrade bears significant impacts throughout Cardano’s system. It gives stake pool operators scalable infrastructure enhancements with no expensive hardware rewrites. Greater transaction volumes shall be processed with comfortable latency.

Builders of DApps and developers will benefit from lower latency in transaction settlement, enabling seamless operation for tokenized real-world assets and decentralized finance applications.

On the user side, they will witness accelerated transaction verification, making applications such as micropayments and high-volume trading possible.

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