---
title: "Radix Protocol Releases"
url: "https://radix-wiki.miow.me/contents/tech/releases"
updated: 2026-10-03
description: "Radix names its major network releases after cities of the ancient world, and each added a layer the last had done without: Olympia opened the public ledger in…"
---

# Radix Protocol Releases

| First mainnet | [Olympia](/contents/tech/releases/radix-mainnet-olympia), July 2021 |
| --- | --- |
| Current mainnet | [Babylon](/contents/tech/releases/radix-mainnet-babylon), 28 September 2023 |
| Babylon enactment | Epoch 32,717 |
| Next mainnet | [Xi’an](/contents/tech/releases/radix-mainnet-xian) |
| Public test network | [Stokenet](/contents/tech/releases/stokenet) |
| Smaller updates | [Protocol updates](/contents/tech/releases/protocol-updates), two to three a year |
| Naming | Cities of the ancient world |

Radix names its major network releases after cities of the ancient world, and each added a layer the last had done without: [Olympia](/contents/tech/releases/radix-mainnet-olympia) opened the public ledger in July 2021 with staking and the native [XRD](/contents/tech/core-protocols/xrd-token) token and no smart contracts at all; [Alexandria](/contents/tech/releases/radix-developer-environment-alexandria) gave developers a [Scrypto](/contents/tech/core-protocols/scrypto-programming-language) environment in December 2021, for an engine mainnet could not yet run; [Babylon](/contents/tech/releases/radix-mainnet-babylon) brought that engine live on 28 September 2023; and [Xi’an](/contents/tech/releases/radix-mainnet-xian) is where [sharding](/contents/tech/core-concepts/sharding), the half of the design every release so far has deferred, has to arrive.

## How a release lands

A release changes the rules every node runs, so it cannot be adopted piecemeal: operators upgrade, the validator set signals readiness, and the network crosses over at a nominated epoch. Smaller [protocol updates](/contents/tech/releases/protocol-updates) land two to three times a year, and Radix’s documentation notes that these are what other networks call hard forks. [Stokenet](/contents/tech/releases/stokenet), the public test network, carries the same protocol version as mainnet and is periodically reset, which destroys every balance and deployed package on it.