# @Optimism: Stake-based transaction ordering live on Sepolia testnet

Source: https://x.com/optimism/status/2044836121860002191?s=46
Kiwi News: https://news.kiwistand.com/stories/Optimism-Stake-based-transaction-ordering-live-on-Sepolia-testnet?index=0x69e284975ea7c287d13f33c87a8c80d48ea5e73ce57f2048898d2f3e680772616241453b
Submitted by misha on 2026-04-17 UTC, 3 upvotes, 0 comments

We're experimenting with how transactions are ordered on OP Mainnet — for the first time ever.

Stake-based transaction ordering is live on Sepolia today. Stake OP, get top-of-block access.

Here's what's happening and why 🧵