Official Confirmation of V27 Mainnet Upgrade Completion, Simultaneously Announcing V28: Node Deadline 10/13, Mainnet Target 10/16

@PiCoreTeam posted on X early this morning, officially confirming that Protocol 27 has successfully completed its upgrade on the Mainnet, and simultaneously announced that the Testnet has been upgraded to Protocol 28.

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Official Announcement Details

The official statement explains that following the successful completion of the Protocol 27 upgrade on the Mainnet, the Testnet has been upgraded to Protocol 28. Protocol 28 improves how the network handles transaction data latency and allows developers to upgrade an entire set of smart contracts at once, enabling safer changes to stored data during application evolution.

The official team also announced the timeline: All node operators must upgrade their nodes to Protocol 28 by October 13, 2026, in preparation for the Mainnet Protocol 28 upgrade on October 16.

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This Confirms the Complete V27 Timeline

8/20–8/21   Testnet 1 switched to v27
8/21        Official announcement of v27 content on X and in-app
9/8–9/9     Node software automatically updated to v27 (Pi Desktop 0.6.3)
9/15        Official node deadline
9/22        Mainnet protocol_version officially switched to v27
            (Observed by OrbitWatch, confirmed by Horizon API)
9/25        Official announcement of V27 completion, simultaneously announcing V28

OrbitWatch previously observed via the Horizon API that the Mainnet had switched to v27 on 9/22. This official announcement serves as a post-facto confirmation, with the timing being consistent.

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V28 Now Has a Clear Timeline

This also resolves a previous uncertainty: the official team had referred to V27 as the "final planned upgrade," but the node upgrade path later showed a step from 27.1 → 28.x, which at the time had no deadline or technical details, only marked as TBD. This official announcement now provides the complete information:

V28 Node Deadline: 2026/10/13
V28 Mainnet Target Date: 2026/10/16

Compared to previous instances:

V22  Node Deadline 4/27   → Mainnet Switch 4/30 (3-day difference)
V23  Node Deadline 5/19   → Mainnet Switch 5/22 (3-day difference)
V24  Node Deadline 6/2    → Mainnet Switch 6/5 (3-day difference)
V25  Node Deadline 6/18   → Mainnet Switch 7/22 (34-day difference)
V26  Node Deadline 8/11   → Mainnet Switch 8/14 (3-day difference)
V27  Node Deadline 9/15   → Mainnet Switch 9/22 (7-day difference)
V28  Node Deadline 10/13  → Mainnet Target 10/16 (Expected 3-day difference)

If V28 proceeds smoothly according to the official timeline, the interval between the node deadline and the Mainnet switch will be just 3 days, returning to the faster pace seen with V22-V24 and V26.

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OrbitWatch's Ongoing Tracking

We will continue to monitor for further technical details regarding V28 on the Testnet, as well as the actual status of nodes and the Mainnet around the October 13 and October 16 dates.

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Further Reading

• Confirmation: Pi Network Mainnet Protocol Officially Switched to v27
• Nodes Upgraded to v27, but Testnet 2 and Mainnet Still Awaiting
• Pi Network Protocol Upgrade Mechanism: From Node Deadline to Mainnet Switch

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Data sources: @PiCoreTeam official X account (post on 2026/9/25), Pi Network Horizon API (api.mainnet.minepi.com). All analysis does not constitute investment advice. OrbitWatch is an independent Pi Network ecosystem observer and is not affiliated with the official Pi Network team.