The rollout will begin on test networks in stages. Holesky is set to upgrade on Oct. 1, followed by Sepolia on Oct. 14 and Hoodi on Oct. 28. Provided these rehearsals run smoothly, the changes will be ready to migrate onto Ethereum’s main network in December.
She added:
“They also agreed that based on some preliminary analysis on Fusaka Devnet-5, blob capacity should more than double over the two weeks following Fusaka activation.”
This mechanism is designed to lower costs for rollups and improve Ethereum’s scalability.
To minimize risks, Ethereum developers agreed to gradually roll out via Blob Parameter Only (BPO) forks. So, instead of raising blob capacity in a single step, thresholds will be increased in phases.
As a result, the first BPO fork, expected Dec. 17, will raise blob targets from 6/9 to 10/15. A second fork on Jan. 7, 2026, will push those limits to 14/21.
To encourage early participation, findings submitted in the first week earn double points, while submissions in the second week qualify for a 1.5x multiplier.
