Baldurs Gate 3 DirectX 11 or Vulkan: What You Actually Get

Baldurs Gate 3 DirectX 11 or Vulkan is a question with a short answer on Windows: open the graphics settings and there is no API picker at all. The Windows build renders through DirectX 11, and that has been true since launch.

Why there is nothing to switch

Larian built the Windows version on DirectX 11 from the start and never added a Vulkan or DirectX 12 path to it. Performance work since launch has come from patches to that same DX11 renderer, not from a new backend you can opt into.

Where Vulkan actually shows up

• The native Linux build, added in September 2025 and tuned for Steam Deck, is built around a Vulkan-style pipeline rather than DirectX. That is standard for a Linux port and is not a setting you choose on the same install as the Windows version.
• The macOS build runs through Apple's own graphics stack rather than either option, so the DirectX-or-Vulkan question does not apply there either.

What this means for you

If you are troubleshooting stutter or crashes on Windows and see advice to "switch to Vulkan," it does not apply here — there is nothing to switch. Performance issues on Windows come down to driver updates, in-game settings (shadow quality and crowd density are the heaviest sliders), and the general CPU load of dense late-game areas, not a rendering API under your control.

The bottom line

Windows runs DirectX 11 only. Linux runs a native Vulkan-based build. macOS runs Apple's own stack. Which one you get is decided by the operating system you install on, not by anything in the options menu.