FiveM’s next major update for GTA V Enhanced rebuilds the platform around a new OneSync overhaul, including support for servers with up to 2048 players. The update also keeps existing Lua, JavaScript, and C# scripts working, drops the older lower capacity sync modes, and is slated to arrive first as an early access release in the coming months. One part that is still unclear is that some code that is currently open source will become closed source, and the reasons have only been explained in general terms.
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 2048 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.
FAQ
What is changing with FiveM for GTA V Enhanced?
FiveM is getting a deeper rebuild for GTA V Enhanced rather than a simple port. The biggest change is a redesigned OneSync networking layer, plus fixes for long running sync problems and a move to high performance sync mode only.
Who is directly affected by the sync mode change?
GTA V Enhanced FiveM servers are directly affected because every server will use the high performance sync mode. Server owners relying on older lower capacity modes are the group being pushed off those options entirely.
Will existing FiveM scripts still need to be rewritten?
No. Existing scripts written in Lua, JavaScript, or C# are set to keep working without modification.
Who needs to do extra work for GTA V Enhanced compatibility?
Creators with 3D assets may need to convert those assets for GTA V Enhanced. The stated tool for that is Alchemist, while details on escrowed asset conversion have not been confirmed yet.
What are the main caveats with this update right now?
The release window is still broad, with early access expected in the coming months rather than on a fixed date. Some parts of the FiveM codebase will also stop being open source, and the rationale has only been outlined at a high level.
What concrete improvements have been named so far?
The rebuild is aimed at lower bandwidth, CPU, and memory use on servers, along with more stable frame rates and lower latency for players. It also targets specific long standing problems, including bullet impact precision and dead body synchronization between clients.
What to watch for
- Check whether your FiveM server still depends on older lower capacity sync modes, because GTA V Enhanced servers will not keep those options. Review custom 3D assets for GTA V Enhanced conversion through Alchemist if your server depends on mapped or proprietary content.
- Keep an eye on early access rollout details for GTA V Enhanced server support, especially if you manage a large or heavily scripted community.
