The team behind FiveM is rebuilding major parts of the platform to support Grand Theft Auto V Enhanced, and it's not just a straight port. They're now using the opportunity to fix things that have needed attention for a while. The biggest technical change is to OneSync, the networking engine that lets FiveM servers run up to 2,048 players simultaneously.
The overhaul simplifies how synchronization works under the hood, which translates to real, measurable gains like servers using less bandwidth, CPU, and memory, and players getting more stable frame rates and lower latency, which is especially noticeable on busy servers. They've also fixed some persistent bugs, including bullet impact precision and dead body sync between clients, which previously required server-side hacks to work consistently.
Going forward, all GTA V Enhanced FiveM servers will run on the high-performance sync mode only. The older, lower-capacity modes are being dropped entirely. On the scripting side, existing scripts written in Lua, JavaScript, or C# will continue to work without modification. 3D assets can be converted for GTA V Enhanced compatibility through a tool called Alchemist, with more details on escrowed asset conversion coming later.
One notable change is that parts of the FiveM codebase that are currently open source will become closed source with this update. The team says this is tied to deeper integration requirements with the base game, though they've kept the explanation fairly vague beyond that. The release is coming "in the coming months" as an early access version, with internal testing already underway.
