(Note to readers: native, non-web-exposed WebGPU implementations aren't beholden any minimum requirements here, or to the standard. So they may support older or less capable devices with feature emulation or compatibility gaps compared to the official spec.)

By category of platforms, with links to the decisions.

• iOS/iPadOS

  • OS version 15+
    • WebKit only gets new features on new OS releases, so WebGPU won't be available on the Web on any older iOS.
  • A9 A10 A11 (Apple4)+

• Mac Apple Silicon: all (macOS 11.0, A12z+ (Apple5))

• Mac x86: 10.13+

  • MTLGPUFamilyMac1 (but some implementations will, at least initially, require MTLGPUFamilyMac2 for indirect command buffers) - note this family has been deprecated in favor of MTLGPUFamilyMac2(?) starting with macOS 13.0

• D3D12: Windows 10 (first release (1507)?), FL 11_1 or (FL 11_0 + resource binding tier 2).

  (D3D12 FL11_0+ = SM5.1+)

  • FL docs
  • Direct3D 11 only support SM5.0 or less.
  • Direct3D 12 only support SM4.0 or above.
  • SM5.1 and below are DXBC.
  • SM6.0 and above are DXIL.

• Android/Linux: Vulkan 1.0+(?) with:

  • fragmentStoresAndAtomics
  • fullDrawIndexUint32
  • BC || (ETC2 && ASTC LDR 2D)
  • maxImageArrayLayers ≥ 256
  • Implicitly must have either S8_UINT or D24_UNORM_S8_UINT (which is true universally across AMD/NVIDIA/Intel/Android), though only because the spec says stencil8 can be implemented as either stencil8 or depth24unorm-stencil8 and doesn't mention depth32float-stencil8.
  • Vulkan 1.1, or the following extensions:
    • VK_KHR_maintenance1 or VK_AMD_negative_viewport_height
    • VK_KHR_maintenance1
    • VK_KHR_maintenance2
  • maxVertexOutputComponents >= 68 && maxFragmentInputComponents >= 68

• Vulkan mobile hardware

  • Adreno: 500+
  • Mali: ?
    • Haven't chosen a target, but see query results below for what should currently be supported (looks like most Mali-G51+ devices)
  • PowerVR: ?
    • See Almost no PowerVR devices satisfy minimum Vulkan requirements #3631

Useful sources:

• Metal Feature Set Tables
• macOS/iOS version required for each Metal Shading Language version
• GPUinfo.org: Vulkan 1.0 features (android) and Vulkan extensions (android) (be sure to look at other platforms too)