# v1 Transactions and the ALT Trade-off

DevFeed: [v1 Transactions and the ALT Trade-off](<https://devfeed.tech/articles/v1-transactions-and-the-alt-trade-off-17255.md>)

Original publisher: [Read original article](<https://solana.com/news/transaction-v1-and-the-alt-trade-off>)

Author: Umberto Natale

Published: 2026-08-17T00:00:00Z

Content type: article

Language: en

Sources: [Solana News Feed](<https://devfeed.tech/sources/solana-news-feed.md>)

Topics: [Solana](<https://devfeed.tech/topics/solana.md>), [Transactions](<https://devfeed.tech/topics/transactions.md>), [benchmarking](<https://devfeed.tech/topics/benchmarking.md>), [SDKs](<https://devfeed.tech/topics/sdks.md>)

Tags: [blockchain](<https://devfeed.tech/tags/blockchain.md>), [blockchain-technology](<https://devfeed.tech/tags/blockchain-technology.md>), [crypto-news](<https://devfeed.tech/tags/crypto-news.md>), [cryptocurrency](<https://devfeed.tech/tags/cryptocurrency.md>), [defi](<https://devfeed.tech/tags/defi.md>), [nfts](<https://devfeed.tech/tags/nfts.md>), [podcasts](<https://devfeed.tech/tags/podcasts.md>), [reference](<https://devfeed.tech/tags/reference.md>), [reports](<https://devfeed.tech/tags/reports.md>), [rpc](<https://devfeed.tech/tags/rpc.md>), [sdks](<https://devfeed.tech/tags/sdks.md>), [serialization](<https://devfeed.tech/tags/serialization.md>), [solana](<https://devfeed.tech/tags/solana.md>), [solana-ecosystem](<https://devfeed.tech/tags/solana-ecosystem.md>), [transactions](<https://devfeed.tech/tags/transactions.md>), [upgrades](<https://devfeed.tech/tags/upgrades.md>), [web3](<https://devfeed.tech/tags/web3.md>)

## AI overview

Solana is introducing the v1 transaction format with a maximum serialized size of 4,096 bytes, replacing Account Lookup Table resolution with larger inline transaction capacity. The analysis finds that current workloads are broadly compatible with the new envelope, while the unchanged 64-account limit may remain a constraint for some applications.

## Source excerpt

Solana is introducing a new transaction format (v1) alongside an increase of the maximum transaction size from 1232 bytes to 4096 bytes. The v1 format aims to unlock new possibilities on-chain. This is done trading-off Account Lookup Tables (ALT) usage. In this research we explore in details the current usage of ALTs, alongside implications of removing them.