Ethereum Glamsterdam Upgrade Explained: A Complete Guide to the 200M Gas Limit
Did you know Ethereum could soon process 10,000 transactions per second? That’s roughly 10 times what the network handles today, and it’s all thanks to an upgrade called Glamsterdam.
Ethereum developers have moved the Glamsterdam upgrade into its final testing phase, running multi-client test networks loaded with every planned change. According to Ethereum Foundation core developer Parithosh Jayanthi, this is “probably the largest fork we’ve had since the Merge.” This transformation could reshape how you interact with Ethereum—lowering fees, increasing speed, and making the network more secure for everyday users. If you’ve ever wondered why Ethereum gas fees spike or how upgrades like this affect your wallet, this guide breaks everything down in plain language.
What you’ll learn: What Glamsterdam actually changes, how ePBS and Block-Level Access Lists work, and what the 200 million gas limit means for your transactions. We’ll also cover the risks, real-world use cases, and what comes next for Ethereum.
Read time: 10-12 minutes
Understanding the Glamsterdam Upgrade for Beginners
Glamsterdam is Ethereum’s upcoming network upgrade that bundles two major changes—the Amsterdam upgrade on Ethereum’s execution layer (where transactions happen) and the Gloas upgrade on its consensus layer (where validators confirm transactions). Think of it like upgrading both your car’s engine and its transmission at the same time, rather than doing one at a time.
Why was this created? Ethereum’s current system has a problem: some users can manipulate transaction ordering to extract value from others (known as maximal extractable value or MEV). This creates an unfair playing field where sophisticated traders profit at regular users’ expense. Also, the network’s 30 million gas limit means blocks fill up quickly, driving up fees during busy periods.
A real-world example: Imagine waiting in line at a store, and someone with special privileges cuts ahead of you to buy the last item on sale. That’s essentially what MEV extraction does on Ethereum right now. Glamsterdam aims to eliminate this by making the system fair for everyone.
The Technical Details: How Glamsterdam Actually Works
Glamsterdam introduces three major technical changes that work together:
1. Enshrined Proposer-Builder Separation (ePBS)
Currently, block proposers (validators who create blocks) can see pending transactions and choose which ones to include and in what order. This creates MEV opportunities. ePBS separates the roles:
- Block builders assemble transactions into blocks
- Proposers simply choose which built block to add to the chain
This separation means proposers can’t manipulate transaction ordering. Think of it like separating the chef who prepares your meal from the waiter who brings it to your table. The waiter can’t change what’s on your plate.
Key benefit: Fairer transaction processing and reduced centralization risk from offchain relays.
2. Block-Level Access Lists (EIP-7928)
This innovation allows each block to declare in advance which accounts and contract data it will touch. Client software can then preload this information and process transactions in parallel.
Key benefit: Faster block execution and more predictable performance.
3. Gas Limit Increase to 200 Million
The gas limit jumps from 30 million to 200 million per block. Combined with other optimizations, this opens the door for up to 10,000 TPS.
Flow diagram suggestion: A visual showing how transactions move from users → mempool → block builder → proposer → finalized block, with ePBS separating builder and proposer roles.
Current Market Context: Why This Matters Now
As of June 2026, Ethereum’s network is processing roughly 1,000-1,500 TPS, with gas fees fluctuating between $0.50 and $5 for simple transfers during normal activity. The Glamsterdam upgrade promises to slash these costs by approximately 78.6% according to developers’ projections.
This timing is significant for several reasons:
- Ethereum staking has reached 40 million ETH, with 96,000 new validators joining in 2026 alone. The network needs better throughput to handle increased activity.
- Layer 2 rollups like Arbitrum and Optimism have grown to handle over $50 billion in total value locked. They settle their data on Ethereum, meaning cheaper Ethereum blockspace directly reduces L2 fees.
- Competing networks like Solana and Avalanche have been pushing higher throughput narratives. This upgrade positions Ethereum to compete more effectively.
The upgrade follows December 2025’s Fusaka hard fork, which expanded data capacity for rollups. Ethereum’s development roadmap is accelerating at a pace not seen since the Merge in 2022.
Competitive Landscape: How Ethereum Compares After Glamsterdam
| Feature | Ethereum (Post-Glamsterdam) | Solana (Current) | Avalanche (Current) |
|---|---|---|---|
| Max TPS | ~10,000 (target) | ~2,000-3,000 (real-world) | ~4,500 (theoretical) |
| Gas/Fee Model | Revised pricing, 78.6% fee reduction projected | Fixed fee per transaction | Variable based on subnet demand |
| MEV Protection | Built-in ePBS (protocol-level) | No native MEV protection | Partial through subnet customization |
| Decentralization | ~1 million validators | ~1,900 validators | ~1,200 validators |
| Ecosystem Size | Largest DeFi, NFT, and L2 ecosystem | Growing DeFi and NFT ecosystem | DeFi and gaming focused |
Why this matters: Ethereum’s massive validator network (over 40 million ETH staked) provides superior security. The upgrade maintains this decentralization while dramatically improving performance. Competing networks may offer faster speeds today, but Ethereum’s approach prioritizes security and fairness at the protocol level.
Practical Applications: Real-World Use Cases
After Glamsterdam launches, here’s how different users benefit:
- DeFi Traders: Lower fees for swapping tokens on Uniswap or lending on Aave. Instead of paying $5-20 for a simple swap, expect fees closer to $0.50-2.00 during normal conditions.
- NFT Collectors: Minting and trading NFTs becomes more affordable. Projects can offer cheaper mints without worrying about gas wars.
- Regular Users Sending ETH: Simple transfers could cost pennies instead of dollars. This makes Ethereum more practical for everyday payments.
- L2 Rollup Operators: Cheaper L1 settlement means L2 networks can offer even lower fees to their users. This strengthens the entire Ethereum ecosystem.
- Stakers and Validators: ePBS ensures fair compensation for proposing blocks, even when separate builders assemble them. This levels the playing field for smaller validators.
Risk Analysis: Expert Perspective
Primary Risks:
1. Technical Risk (Implementation Bugs): Glamsterdam is complex, merging two upgrades into one. Bugs in production could cause temporary network disruptions or security vulnerabilities. Ethereum developers have extensive testing history (the Merge went smoothly), but the scale here is unprecedented.
2. Coordination Risk: All major clients must implement changes correctly. If a client bug appears after mainnet deployment, coordination to fix and force an upgrade could be challenging.
3. Gas Limit Uncertainty: Jumping from 30 million to 200 million gas could create unexpected network dynamics. While tests show positive results, real-world behavior may differ.
Mitigation Strategies:
- Extensive multi-client devnet testing (currently ongoing)
- Phased deployment: devnets → testnets → mainnet
- Emergency upgrade mechanisms if issues arise
Expert Consensus: Most developers are cautiously optimistic. The timeline was already pushed from H1 2026 to H2 2026 to accommodate the scale of changes—a sign of responsible development, not panic.
Beginner’s Corner: Quick Start Guide
What you should do to prepare for Glamsterdam:
1. Keep your wallet updated – Ensure you’re running the latest version of MetaMask, Ledger, or any wallet you use. Updates typically include support for network upgrades.
2. Don’t do anything special – For most users, Glamsterdam will happen automatically. You don’t need to move funds or take action unless your wallet provider specifically asks.
3. Watch for announcements – Follow Ethereum Foundation social channels or your wallet provider’s updates for when testnet and mainnet dates are confirmed.
4. Learn about ePBS – Understanding how ePBS protects you from MEV will help you appreciate the upgrade’s benefits.
Common mistakes to avoid:
- Don’t fall for “upgrade scams” asking you to connect your wallet to “claim tokens” related to the fork
- Don’t panic if you see temporary price volatility around the upgrade date
- Don’t make large transactions during the actual activation window (typically a few hours)
Future Outlook: What’s Next
After Glamsterdam, developers have already named the next upgrade: Hegota. This signals an accelerating development roadmap.
What to expect in the coming years:
1. Continued scaling: Glamsterdam sets the foundation for even more ambitious upgrades. Hegota likely continues the trend of increasing throughput and reducing costs.
2. Zero-knowledge proving integration: The gas repricing in Glamsterdam explicitly paves the way for ZK-proof verification. This could eventually enable near-instant block verification.
3. Layer 2 convergence: With cheaper L1 settlement, expect L2 ecosystems to consolidate around Ethereum’s base layer, creating a unified scaling ecosystem.
4. Institutional adoption: Higher throughput and lower fees make Ethereum more attractive for enterprise applications and traditional finance integration.
The upgrade is scheduled for mainnet activation in H2 2026, with no firm date locked in yet. The current testnet phase will determine the final timeline.
Key Takeaways
- Glamsterdam is Ethereum’s biggest upgrade since the Merge, combining execution layer and consensus layer changes to increase throughput 10x to 10,000 TPS.
- The gas limit jumps from 30 million to 200 million, with projected fee reductions of 78.6% across transfers and smart contract calls.
- Enshrined Proposer-Builder Separation (ePBS) makes transaction ordering fairer and reduces MEV exploitation, benefiting all users.
- Block-Level Access Lists enable parallel transaction processing, making execution faster and more predictable.
- Mainnet activation is expected in H2 2026, with Hegota already named as the next upgrade target.
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