Upgrade 19, the Karst hard fork, is scheduled to activate on Mainnet OP Stack chains Wed, Jul 8, 2026 at 16:00:01 UTC. Please refer to the notice page for full details and required actions.
Phase 1 of the stake based experiment has been running as expected since May 26 10am EST. We've now moved to Phase 2.
NOTE: This is a time-boxed experiment: four weeks maximum, after which OP Mainnet reverts to standard PGA ordering.
Full notice and disclosure before you
Sepolia testing for stake-based priority order experiment will complete today. Phase 2 of the experiment has been running as expected since May 7.
We’ll be deploying to OP Mainnet tomorrow, May 26 at 10am EST.
This is a time-boxed experiment: four weeks maximum, after which OP
Rotating npm tokens doesn't fix the problem. It resets the clock.
We migrated 3 repos and 6 packages to OIDC Trusted Publishing on CircleCI, then deleted every static token on the account.
Big day for the Superchain. 🔴✨
We’re integrating ZK more deeply into the OP Stack, and are excited to announce that @SuccinctLabs is our first preferred proving partner in this area. Validity proofs are going — and withdrawals are about to get faster.
Here's what that means.
We're moving OP-Reth specific crates fully to OP Labs ownership!
OP Reth was co-built by @OPLabsPBC and @paradigm engineers to scale the impact of the OP Stack, using the Reth SDK. OP Reth is the primary high-performance execution client across the Superchain, and as this
LISTEN UP EVERYBODY! Today we're launching OP Enterprise.
We all know that crypto is at the cusp of major mainstream adoption. Nearly every major enterprise has a crypto strategy.
We're the only team that has successfully launched chains for multiple companies. We've packaged
This is such an incredible step for the OPStack. Kona is becoming a viable alternative to the op-node - it is more maintainable, faster and safer than the go client. Really excited about what’s next, this is the beginning of a new chapter
The Kona repo has been migrated into the @Optimism monorepo.
What @vex_0x and @refcell began in early 2024 is now a stable alternative OP Stack implementation. Thanks to everyone who pitched in, and please keep contributing here: github.com/ethereum-optim…
In 2026 we’re increasing
The Kona repo has been migrated into the @Optimism monorepo.
What @vex_0x and @refcell began in early 2024 is now a stable alternative OP Stack implementation. Thanks to everyone who pitched in, and please keep contributing here: github.com/ethereum-optim…
In 2026 we’re increasing
