> ## Documentation Index
> Fetch the complete documentation index at: https://docs.sophon.xyz/llms.txt
> Use this file to discover all available pages before exploring further.

# Gas Utility (Legacy)

> SOPH gas utility during the Sophon Chain wind-down

<Warning>
  SOPH's gas utility is being phased out with the Sophon Chain. This page describes
  the remaining chain-era behavior, not Sophon's future token model.
</Warning>

While the legacy chain remains operational, transactions use SOPH for gas. ZKsync
paymasters can sponsor or customize transaction fees so an application can pay on
behalf of its users.

New deposits into Sophon have been disabled since June 25, 2026. Use
[claim.sophon.com](https://claim.sophon.com) to review available withdrawal routes,
and do not bridge new assets into Sophon.

After the chain is decommissioned, SOPH will no longer be used for Sophon Chain gas.
Its replacement utility is a [product-funded buyback-and-burn model](/tokenomics/soph).