tModLoader 1.4.5: Update Status, Progress and Release Date

tModLoader 1.4.5 update status at a glance

• Terraria (vanilla): 1.4.5.8, the hotfix released in late August 2026.
• tModLoader stable: v2026.08.3.0, released October 1, 2026. Built on Terraria 1.4.4.
• tModLoader preview: v2026.09.2.1, released October 1, 2026. Also built on 1.4.4.
• tModLoader 1.4.5: in development on the 1.4.5 branch, testable through the password-protected 1.4.5-dev Steam beta. Not released.
• Release date: none announced.

When is tModLoader 1.4.5 coming out?

Nobody outside the team knows, and the team itself has not picked a date. The pinned 1.4.5 Update Information issue on GitHub, opened on March 31, 2026, says "updating tModLoader to 1.4.5 is a large undertaking and will take many months yet." The September 2026 Stable Update post on Steam repeats it: "We are still not ready to set a release date for when the 1.4.5 version of tModLoader will become the default release."

The October 2026 Stable Update, published on October 1, does not give a date either. It says progress "is going smoothly" and that there are still many tasks to be done. Any site giving you a precise tModLoader 1.4.5 release date is guessing.

What we do know is the order of events. Before the default release, the team plans to "Preview" the 1.4.5 beta to modders, and 1.4.4 keeps getting regular monthly updates until that preview happens. When stable updates on 1.4.4 slow down and a modder preview is announced, the release is getting close.

tModLoader 1.4.5 progress so far

• January 27, 2026: Terraria 1.4.5 releases. tModLoader stays on 1.4.4.
• March 31, 2026: the team opens and pins GitHub issue #5070, the central page for the port: FAQ, porting notes for contributors and the beta branch.
• May to August 2026: each monthly Stable Update on Steam ships fixes for 1.4.4 while the port continues on the 1.4.5 branch.
• Late August 2026: Re-Logic releases the 1.4.5.8 hotfix. The September post (August 31) says it should be the last hotfix needed for the tModLoader 1.4.5 release and that adapting to it "should be straightforward".
• October 1, 2026: the October Stable Update confirms the 1.4.5.8 changes are merged and "the development build now contains all the new changes."

The 1.4.5 branch builds and launches, but it is not complete. The team is still working through the porting TODO list and asks contributors for small, focused pull requests. Publishing mods for 1.4.5 is not implemented yet, which is one of the clearest signs that a public release is still some way off.

The next data point should be the November 2026 Stable Update, expected around November 1, since stable releases usually land on the first of the month. We will update this page when it is out.

Can you play tModLoader 1.4.5 now? The 1.4.5-dev branch

Technically yes. tModLoader has a Steam beta branch called 1.4.5-dev that updates with every commit to the 1.4.5 branch. The password and the steps to join it are listed on the GitHub issue linked above.

But it is not meant for regular players. The team says it "will change daily and bugs will happen", and it is mainly there for contributors and modders who are porting their mods. Almost none of your mods will be available on it, since mod publishing for 1.4.5 does not work yet. Do not move your main modded world or your group's server to it.

Will my mods and worlds work on tModLoader 1.4.5?

Mods: not right away. The official FAQ answers "no" to whether all mods will work on 1.4.5 immediately, because so much changed in the vanilla update. Modders get time to port before the release, so maintained mods should be ready when 1.4.5 becomes stable. Abandoned mods will stay on 1.4.4.

tModLoader worlds and players: the team says it aims to keep backwards compatibility, so your 1.4.4 modded worlds should carry over. It is a goal, not a promise, so back them up before switching.

Vanilla 1.4.5 worlds: according to Re-Logic's February 2026 State of the Game, worlds played on vanilla 1.4.5 cannot be moved to the current tModLoader. Keep your vanilla and modded worlds separate.

1.4.4 after the release: it stays available as a legacy version, like 1.3 and 1.4.3 before it, and keeps receiving maintenance updates.

How to play vanilla 1.4.5 and modded 1.4.4 while you wait

You do not have to pick between the new content and your mods. The simplest setup is two servers, one for each version:

• A vanilla 1.4.5 server for the Bigger & Boulder content. Players join with the regular Terraria client.
• A modded tModLoader 1.4.4 server for Calamity and the rest of your mod list. Players join through the tModLoader app on Steam, with the same tModLoader version and mods as the server.

Keep each world on its own server and never open a vanilla 1.4.5 world with tModLoader. When tModLoader 1.4.5 comes out, back up your modded world, wait until your key mods are ported, then update the modded server.

On AxentHost, both are server variants of the same Terraria server:

• The Vanilla variant installs the latest Terraria server by default, which is 1.4.5.8 today. You can also set a specific version in the "Terraria version" setting.
• The tModLoader variant installs the latest tModLoader release from GitHub, which is still 1.4.4. You can pin an exact tag such as v2026.08.3.0 in the version setting so the server does not move when you reinstall. Mods are uploaded as described in our free Terraria server guide.

A free account runs one Terraria server at a time. To keep the vanilla and the modded server online together, create a team: a free team can run two servers of the same game.

FAQ

Is tModLoader updated for 1.4.5?

No. As of October 28, 2026, the stable and preview releases of tModLoader are both built on Terraria 1.4.4. The 1.4.5 port is only available as the 1.4.5-dev Steam beta branch.

When is tModLoader 1.4.5 coming out?

There is no release date. The tModLoader team says the update "will take many months yet" and that it is "still not ready to set a release date". A modder preview is planned before the public release.

Where can I follow tModLoader 1.4.5 progress?

The team posts a Stable Update on the tModLoader Steam news page every month, usually on the 1st, with a 1.4.5 progress section. GitHub issue #5070 holds the FAQ and beta branch details.

Can I join a vanilla 1.4.5 server with tModLoader?

No. tModLoader is still on 1.4.4, so it cannot connect to a 1.4.5 server. Use the regular Terraria client for vanilla 1.4.5 servers.