ETH Glamsterdam devnet targets 200M gas

TLDR

Ethereum's Glamsterdam upgrade is now in its final devnet stage and is designed to safely support a 200 million gas limit per block, roughly tripling current L1 capacity.

1. Glamsterdam bundles major EIPs so Ethereum (ETH) can move from about 60 million to a targeted 200 million gas limit, potentially enabling around 10,000 TPS on mainnet.
2. Key changes like enshrined proposer-builder separation and Block-Level Access Lists aim to cut fees (projections near 78 percent in some cases) and reduce MEV and centralization risks.
3. Mainnet activation is aimed for the second half of 2026, with public testnets and client stability the main gating factors and the 200M gas level a design target, not an automatic switch.

Deep Dive

1. Glamsterdam And 200M Gas

Glamsterdam is Ethereum's next large hard fork, combining the Amsterdam execution layer and Gloas consensus layer upgrades into one package, described as the biggest protocol change since the Merge. Reports note that devnets are now running the full set of planned EIPs, marking the final development phase before public testnets.

Within this design, Ethereum's per block gas limit is expected to move from roughly 60 million today to a 200 million gas design target, which could translate to around 10,000 transaction per second equivalent throughput under realistic workloads, according to detailed coverage of the upgrade. The 200M figure reflects what the new architecture is expected to safely support, not a hard coded value that flips on immediately at fork time.

2. Fees, MEV And L2 Impact

Glamsterdam ships a bundle of EIPs, including enshrined Proposer-Builder Separation (ePBS, EIP-7732) and Block-Level Access Lists (BALs, EIP-7928). ePBS moves block-builder coordination into the core protocol to reduce reliance on external relays and mitigate some MEV and centralization risks.

BALs let blocks predeclare which accounts and contract storage they will touch, so clients can preload data and process unrelated transactions in parallel. Alongside this, gas repricing makes compute cheaper and raw state access more expensive, with developers projecting up to about 78.6 percent fee reductions for many workloads in one detailed analysis. Higher gas capacity also expands data availability for rollups, which could lower L2 costs that depend on posting data to Ethereum.

3. Timeline, Risks And What To Watch

Core teams currently run closed devnets with all Glamsterdam EIPs; the next steps are public testnets, then a mainnet fork targeted for the second half of 2026, although no exact date is set. Multiple reports emphasize that a mainnet 200M gas limit is a target enabled by Glamsterdam, and that validators will raise limits gradually once multi client testnets like Holesky and others show stable behavior.

Risks include unforeseen performance bottlenecks, client bugs, or state growth exceeding expectations despite new gas rules that try to keep annual state bloat within sustainable bounds. Any of these could slow the gas limit increase or push back mainnet activation.

Conclusion

Glamsterdam positions Ethereum to scale its base layer capacity significantly by redesigning how blocks are built, executed, and priced, with a 200M gas limit as the long term target. If testing and rollout go smoothly, the combination of higher capacity, lower effective fees, and reduced MEV reliance could strengthen Ethereum's role as both a settlement layer for rollups and a more capable L1 for direct activity. The real effect on users will depend on how quickly testnets stabilize and how cautiously the validator set ramps up the gas limit on mainnet.