diff --git a/.github/workflows/reusable-cpp-coverage.yml b/.github/workflows/reusable-cpp-coverage.yml
index ed7f3412..5beae68f 100644
--- a/.github/workflows/reusable-cpp-coverage.yml
+++ b/.github/workflows/reusable-cpp-coverage.yml
@@ -24,7 +24,7 @@ on:
         type: boolean
       llvm-version:
         description: "The LLVM version to set up (formatted as 'major.minor.patch') or commit hash (minimum 7 characters, e.g., 'a832a52')"
-        default: "21.1.8"
+        default: "23.1.2"
         type: string
       use-sccache-gha:
         description: "Whether to use sccache with the GitHub Actions cache backend"
@@ -72,7 +72,7 @@ jobs:
 
       - name: Set up MLIR
         if: ${{ inputs.setup-mlir }}
-        uses: munich-quantum-software/setup-mlir@3f32263ce571a8b745068980f30f188b6e800763 # v1.4.2
+        uses: munich-quantum-software/setup-mlir@8d3eae73d0f0196fd30c787d91ebd2018cb6c709 # v1.5.0
         with:
           llvm-version: ${{ inputs.llvm-version }}
 
diff --git a/.github/workflows/reusable-cpp-linter.yml b/.github/workflows/reusable-cpp-linter.yml
index 582cb550..a8f4c28a 100644
--- a/.github/workflows/reusable-cpp-linter.yml
+++ b/.github/workflows/reusable-cpp-linter.yml
@@ -60,7 +60,7 @@ on:
         type: boolean
       llvm-version:
         description: "The LLVM version to set up (formatted as 'major.minor.patch') or commit hash (minimum 7 characters like 'a832a52')"
-        default: "21.1.8"
+        default: "23.1.2"
         type: string
 
 concurrency:
@@ -102,7 +102,7 @@ jobs:
 
       - name: Set up MLIR
         if: ${{ inputs.setup-mlir }}
-        uses: munich-quantum-software/setup-mlir@3f32263ce571a8b745068980f30f188b6e800763 # v1.4.2
+        uses: munich-quantum-software/setup-mlir@8d3eae73d0f0196fd30c787d91ebd2018cb6c709 # v1.5.0
         with:
           llvm-version: ${{ inputs.llvm-version }}
 
diff --git a/.github/workflows/reusable-cpp-tests-macos.yml b/.github/workflows/reusable-cpp-tests-macos.yml
index 2dfc7012..5b39929a 100644
--- a/.github/workflows/reusable-cpp-tests-macos.yml
+++ b/.github/workflows/reusable-cpp-tests-macos.yml
@@ -43,7 +43,7 @@ on:
         type: boolean
       llvm-version:
         description: "The LLVM version to set up (formatted as 'major.minor.patch') or commit hash (minimum 7 characters, e.g., 'a832a52')"
-        default: "21.1.8"
+        default: "23.1.2"
         type: string
       preset-name:
         description: "The CMake preset to use for configuration and build"
@@ -93,7 +93,7 @@ jobs:
 
       - name: Set up MLIR
         if: ${{ inputs.setup-mlir }}
-        uses: munich-quantum-software/setup-mlir@3f32263ce571a8b745068980f30f188b6e800763 # v1.4.2
+        uses: munich-quantum-software/setup-mlir@8d3eae73d0f0196fd30c787d91ebd2018cb6c709 # v1.5.0
         with:
           llvm-version: ${{ inputs.llvm-version }}
 
diff --git a/.github/workflows/reusable-cpp-tests-ubuntu.yml b/.github/workflows/reusable-cpp-tests-ubuntu.yml
index 7f39a414..f78e787f 100644
--- a/.github/workflows/reusable-cpp-tests-ubuntu.yml
+++ b/.github/workflows/reusable-cpp-tests-ubuntu.yml
@@ -43,7 +43,7 @@ on:
         type: boolean
       llvm-version:
         description: "The LLVM version to set up (formatted as 'major.minor.patch') or commit hash (minimum 7 characters, e.g., 'a832a52')"
-        default: "21.1.8"
+        default: "23.1.2"
         type: string
       preset-name:
         description: "The CMake preset to use for configuration and build"
@@ -93,7 +93,7 @@ jobs:
 
       - name: Set up MLIR
         if: ${{ inputs.setup-mlir }}
-        uses: munich-quantum-software/setup-mlir@3f32263ce571a8b745068980f30f188b6e800763 # v1.4.2
+        uses: munich-quantum-software/setup-mlir@8d3eae73d0f0196fd30c787d91ebd2018cb6c709 # v1.5.0
         with:
           llvm-version: ${{ inputs.llvm-version }}
 
diff --git a/.github/workflows/reusable-cpp-tests-windows.yml b/.github/workflows/reusable-cpp-tests-windows.yml
index c76dc34f..048df0fd 100644
--- a/.github/workflows/reusable-cpp-tests-windows.yml
+++ b/.github/workflows/reusable-cpp-tests-windows.yml
@@ -41,12 +41,8 @@ on:
         type: boolean
       llvm-version:
         description: "The LLVM version to set up (formatted as 'major.minor.patch') or commit hash (minimum 7 characters, e.g., 'a832a52')"
-        default: "21.1.8"
+        default: "23.1.2"
         type: string
-      mlir-debug:
-        description: "Whether to use a debug build of MLIR"
-        default: false
-        type: boolean
       preset-name:
         description: "The CMake preset to use for configuration and build"
         required: true
@@ -168,10 +164,9 @@ jobs:
 
       - name: Set up MLIR
         if: ${{ inputs.setup-mlir }}
-        uses: munich-quantum-software/setup-mlir@3f32263ce571a8b745068980f30f188b6e800763 # v1.4.2
+        uses: munich-quantum-software/setup-mlir@8d3eae73d0f0196fd30c787d91ebd2018cb6c709 # v1.5.0
         with:
           llvm-version: ${{ inputs.llvm-version }}
-          debug: ${{ inputs.mlir-debug }}
 
       - name: Install the latest version of uv
         uses: astral-sh/setup-uv@c18668ad3cf93ea998bef934396af7bb5c839dc7 # v10.2.0
diff --git a/.github/workflows/reusable-python-linter.yml b/.github/workflows/reusable-python-linter.yml
index 63f4b5d8..4cebbd12 100644
--- a/.github/workflows/reusable-python-linter.yml
+++ b/.github/workflows/reusable-python-linter.yml
@@ -32,7 +32,7 @@ on:
         type: boolean
       llvm-version:
         description: "The LLVM version to set up (formatted as 'major.minor.patch') or commit hash (minimum 7 characters, e.g., 'a832a52')"
-        default: "21.1.8"
+        default: "23.1.2"
         type: string
       check-stubs:
         description: "Whether to check if the stub files are up to date. Requires a nox session called `stubs` to exist."
@@ -90,7 +90,7 @@ jobs:
 
       - name: Set up MLIR
         if: ${{ inputs.setup-mlir }}
-        uses: munich-quantum-software/setup-mlir@3f32263ce571a8b745068980f30f188b6e800763 # v1.4.2
+        uses: munich-quantum-software/setup-mlir@8d3eae73d0f0196fd30c787d91ebd2018cb6c709 # v1.5.0
         with:
           llvm-version: ${{ inputs.llvm-version }}
 
diff --git a/.github/workflows/reusable-python-packaging-wheel-cibuildwheel.yml b/.github/workflows/reusable-python-packaging-wheel-cibuildwheel.yml
index 842bf41b..ddc17565 100644
--- a/.github/workflows/reusable-python-packaging-wheel-cibuildwheel.yml
+++ b/.github/workflows/reusable-python-packaging-wheel-cibuildwheel.yml
@@ -27,9 +27,13 @@ on:
         description: "Whether to set up MLIR"
         default: false
         type: boolean
+      mlir-assertions:
+        description: "Whether the MLIR SDK should retain assertions (Linux consumers select the SDK inside cibuildwheel)"
+        default: false
+        type: boolean
       llvm-version:
         description: "The LLVM version to set up (formatted as 'major.minor.patch') or commit hash (minimum 7 characters, e.g., 'a832a52')"
-        default: "21.1.8"
+        default: "23.1.2"
         type: string
     secrets:
       AWS_S3_BUCKET:
@@ -74,9 +78,10 @@ jobs:
 
       - name: Set up MLIR
         if: ${{ inputs.setup-mlir && !startsWith(inputs.runs-on, 'ubuntu') }}
-        uses: munich-quantum-software/setup-mlir@3f32263ce571a8b745068980f30f188b6e800763 # v1.4.2
+        uses: munich-quantum-software/setup-mlir@8d3eae73d0f0196fd30c787d91ebd2018cb6c709 # v1.5.0
         with:
           llvm-version: ${{ inputs.llvm-version }}
+          assertions: ${{ inputs.mlir-assertions }}
 
       - name: Install the latest version of uv
         uses: astral-sh/setup-uv@c18668ad3cf93ea998bef934396af7bb5c839dc7 # v10.2.0
diff --git a/.github/workflows/reusable-python-tests.yml b/.github/workflows/reusable-python-tests.yml
index 96bd0290..d005bfa3 100644
--- a/.github/workflows/reusable-python-tests.yml
+++ b/.github/workflows/reusable-python-tests.yml
@@ -36,7 +36,7 @@ on:
         type: boolean
       llvm-version:
         description: "The LLVM version to set up (formatted as 'major.minor.patch') or commit hash (minimum 7 characters, e.g., 'a832a52')"
-        default: "21.1.8"
+        default: "23.1.2"
         type: string
       free-disk-space:
         description: "Whether to free disk space before running the tests"
@@ -183,7 +183,7 @@ jobs:
 
       - name: Set up MLIR
         if: ${{ inputs.setup-mlir }}
-        uses: munich-quantum-software/setup-mlir@3f32263ce571a8b745068980f30f188b6e800763 # v1.4.2
+        uses: munich-quantum-software/setup-mlir@8d3eae73d0f0196fd30c787d91ebd2018cb6c709 # v1.5.0
         with:
           llvm-version: ${{ inputs.llvm-version }}
 
diff --git a/.github/workflows/reusable-qiskit-upstream-tests.yml b/.github/workflows/reusable-qiskit-upstream-tests.yml
index 07a8a1bc..7232d59b 100644
--- a/.github/workflows/reusable-qiskit-upstream-tests.yml
+++ b/.github/workflows/reusable-qiskit-upstream-tests.yml
@@ -28,7 +28,7 @@ on:
         type: boolean
       llvm-version:
         description: "The LLVM version to set up (formatted as 'major.minor.patch') or commit hash (minimum 7 characters, e.g., 'a832a52')"
-        default: "21.1.8"
+        default: "23.1.2"
         type: string
 
 concurrency:
@@ -65,7 +65,7 @@ jobs:
 
       - name: Set up MLIR
         if: ${{ inputs.setup-mlir }}
-        uses: munich-quantum-software/setup-mlir@3f32263ce571a8b745068980f30f188b6e800763 # v1.4.2
+        uses: munich-quantum-software/setup-mlir@8d3eae73d0f0196fd30c787d91ebd2018cb6c709 # v1.5.0
         with:
           llvm-version: ${{ inputs.llvm-version }}