Current outcome
Ethereum's Glamsterdam upgrade went live on the Sepolia testnet, raising the testnet block gas limit from roughly 60 million to about 200 million as developers test capacity improvements ahead of mainnet deployment.
Progress timeline
7 material updates- #01
Ethereum’s upcoming Glamsterdam upgrade clears rehearsal for a big jump in capacity
Ethereum's Glamsterdam upgrade cleared a key rehearsal milestone, with Nethermind passing all 2,302 performance tests and the test network raising its block gas limit toward 200 million ahead of a proposed October 6 Sepolia deployment.
- #02
Ethereum confirms Glamsterdam dates, but warns 'fake' builders could stall the chain
Ethereum developers confirmed Glamsterdam testnet dates while warning that attackers could exploit free test ether and disposable builder identities to disrupt Sepolia block auctions by withholding transaction payloads.
Source evidence: CoinDesk
- #03
以太坊基金会将于10月6日在Sepolia测试网上激活Glamsterdam升级
The Ethereum Foundation announced that the Glamsterdam upgrade will activate on the Sepolia testnet on October 6, 2026 (epoch 353,024, slot 11,296,768), requiring node operators to update execution and consensus clients; Hoodi and mainnet activation dates remain undecided.
State after update: Ethereum developers confirmed Glamsterdam testnet dates and warned attackers could exploit free test ether and disposable builder identities to disrupt Sepolia block auctions by withholding transaction payloads; the Ethereum Foundation further announced the upgrade will activate on the Sepolia testnet on October 6, 2026, requiring node operators to update clients, with Hoodi and mainnet dates undecided.
Source evidence: theblockbeats · Cointelegraph
- #04
以太坊Glamsterdam升级今晚将在Sepolia测试，区块Gas上限拟提升至2亿
Ethereum's Glamsterdam upgrade activates on Sepolia testnet on October 6 at 13:53 UTC, raising the block gas limit from roughly 60 million to 200 million; an emergency Prysm 7.2.1 validator client release fixes gas limit configuration to ensure validators automatically propose 200M gas blocks.
State after update: Ethereum's Glamsterdam upgrade activates on Sepolia testnet on October 6, raising the block gas limit from ~60M to 200M; validators need clients like Prysm 7.2.1 with updated gas limit settings to automatically propose larger blocks. The 200M gas setting currently applies only to Sepolia testnet; Glamsterdam is not yet activated on Ethereum mainnet.
Source evidence: theblockbeats · foresightnews · Cointelegraph
- #05
Ethereum’s Glamsterdam Upgrade Activates on Sepolia
Ethereum's Glamsterdam upgrade went live on the Sepolia testnet, finalizing its first two upgraded epochs while the gas limit began a gradual climb from 60 million toward a 200 million client target.
Source evidence: The Defiant · foresightnews
- #06
Ethereum’s Glamsterdam test runs near 200 million gas per block after upgrade
After the Glamsterdam upgrade activated on Sepolia, early blocks used roughly 52M to 92M gas each, only 26% to 46% of the available limit; in a six-minute voting period all 32 scheduled blocks were proposed and 99.97% of eligible testnet stake voted toward finality; Hoodi testnet is tentatively set for Oct. 27, with no mainnet activation date announced.
State after update: Ethereum's Glamsterdam upgrade is active on the Sepolia testnet, raising the block gas limit from ~60M to nearly 200M; early blocks used 26% to 46% of capacity, and finality performed well. The Hoodi testnet is tentatively set for October 27, 2026, with no mainnet activation date set.
Source evidence: CoinDesk · theblockbeats
- #07
以太坊Glamsterdam升级于测试网激活，区块Gas上限已提升至约2亿
Ethereum's Glamsterdam upgrade went live on the Sepolia testnet, raising the testnet block gas limit from roughly 60 million to about 200 million as developers test capacity improvements ahead of mainnet deployment.
Source evidence: theblockbeats