diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e50ad12..6c1ae5a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -23,6 +23,7 @@ jobs:
           - codspeedhq-arm64-ubuntu-22.04
           - codspeedhq-arm64-ubuntu-24.04
         mode:
+          - simulation
           - instrumentation
           - walltime
 
@@ -69,8 +70,8 @@ jobs:
       matrix:
         version:
           - "latest"
-          - "4.2.0"
-          - "v4.2.0"
+          - "4.4.0"
+          - "v4.4.0"
 
     runs-on: ubuntu-latest
     env:
@@ -81,5 +82,5 @@ jobs:
         uses: ./
         with:
           runner-version: ${{ matrix.version }}
-          mode: instrumentation
+          mode: simulation
           run: echo "Testing version format ${{ matrix.version }}!"
diff --git a/README.md b/README.md
index c9e21f7..fda6aec 100644
--- a/README.md
+++ b/README.md
@@ -19,9 +19,9 @@ GitHub Actions for running [CodSpeed](https://codspeed.io) in your CI.
     run: "<YOUR_COMMAND>"
 
     # [REQUIRED]
-    # The measurement mode to use, either: "instrumentation" or "walltime".
+    # The measurement mode to use: "simulation" (recommended), or "walltime".
     # More details on the instruments at https://docs.codspeed.io/instruments/
-    mode: "instrumentation"
+    mode: "simulation"
 
     # [OPTIONAL]
     # CodSpeed recommends using OpenID Connect (OIDC) for authentication.
@@ -105,7 +105,7 @@ jobs:
       - name: Run benchmarks
         uses: CodSpeedHQ/action@v4
         with:
-          mode: instrumentation
+          mode: simulation
           run: pytest tests/ --codspeed
 ```
 
@@ -150,7 +150,7 @@ jobs:
       - name: Run the benchmarks
         uses: CodSpeedHQ/action@v4
         with:
-          mode: instrumentation
+          mode: simulation
           run: cargo codspeed run
 ```
 
@@ -190,6 +190,6 @@ jobs:
       - name: Run benchmarks
         uses: CodSpeedHQ/action@v4
         with:
-          mode: instrumentation
+          mode: simulation
           run: npx vitest bench
 ```
diff --git a/action.yml b/action.yml
index e161508..0d711d6 100644
--- a/action.yml
+++ b/action.yml
@@ -12,11 +12,12 @@ inputs:
 
   mode:
     description: |
-      The mode to to run the benchmarks in. The following modes are available:
-      - `instrumentation`: Run the benchmarks with CPU instrumentation measurements.
+      The mode to run the benchmarks in. The following modes are available:
+      - `simulation`: Run the benchmarks with CPU simulation measurements.
       - `walltime`: Run the benchmarks with walltime measurement.
+      - `instrumentation`: (Deprecated) Legacy name for `simulation`. Please use `simulation` instead.
 
-      We strongly recommend starting with the `instrumentation` mode.
+      We strongly recommend starting with the `simulation` mode.
 
       Using the `walltime` mode on traditional VMs/Hosted Runners might lead to inconsistent data. For the best results, we recommend using CodSpeed Hosted Macro Runners, which are fine-tuned for performance measurement consistency.
       Check out the [Walltime Instrument Documentation](https://docs.codspeed.io/instruments/walltime/) for more details.
@@ -99,7 +100,7 @@ runs:
         # Validate required inputs
         # (custom message for smoother v4 migration)
         if [ -z "${{ inputs.mode }}" ]; then
-          echo "::error title=Missing required input 'mode'::The 'mode' input is required as of CodSpeed Action v4. Please explicitly set 'mode' to 'instrumentation' or 'walltime'. Before, this variable was automatically set to instrumentation on every runner except for CodSpeed macro runners where it was set to walltime by default. See https://codspeed.io/docs/instruments for details."
+          echo "::error title=Missing required input 'mode'::The 'mode' input is required as of CodSpeed Action v4. Please explicitly set 'mode' to 'simulation' or 'walltime'. Before, this variable was automatically set to instrumentation on every runner except for CodSpeed macro runners where it was set to walltime by default. See https://codspeed.io/docs/instruments for details."
           exit 1
         fi
 
@@ -132,11 +133,11 @@ runs:
         elif [ "$VERSION_TYPE" = "branch" ]; then
           # Install from specific branch using cargo
           source $HOME/.cargo/env
-          cargo install --git https://github.com/CodSpeedHQ/runner --branch "$RUNNER_VERSION"
+          cargo install --locked --git https://github.com/CodSpeedHQ/runner --branch "$RUNNER_VERSION"
         elif [ "$VERSION_TYPE" = "rev" ]; then
           # Install from specific commit/rev using cargo
           source $HOME/.cargo/env
-          cargo install --git https://github.com/CodSpeedHQ/runner --rev "$RUNNER_VERSION"
+          cargo install --locked --git https://github.com/CodSpeedHQ/runner --rev "$RUNNER_VERSION"
         else
           # Release version
           head_status=$(curl -I -fsSL -w "%{http_code}" -o /dev/null https://github.com/CodSpeedHQ/runner/releases/download/v$RUNNER_VERSION/codspeed-runner-installer.sh)
diff --git a/examples/nodejs-typescript-codspeed.yml b/examples/nodejs-typescript-codspeed.yml
index 8780575..b064be1 100644
--- a/examples/nodejs-typescript-codspeed.yml
+++ b/examples/nodejs-typescript-codspeed.yml
@@ -27,5 +27,5 @@ jobs:
       - name: Run benchmarks
         uses: CodSpeedHQ/action@v4
         with:
-          mode: instrumentation
+          mode: simulation
           run: node -r esbuild-register benches/bench.ts
diff --git a/examples/python-pytest-codspeed.yml b/examples/python-pytest-codspeed.yml
index 1f52755..84861c1 100644
--- a/examples/python-pytest-codspeed.yml
+++ b/examples/python-pytest-codspeed.yml
@@ -29,5 +29,5 @@ jobs:
       - name: Run benchmarks
         uses: CodSpeedHQ/action@v4
         with:
-          mode: instrumentation
+          mode: simulation
           run: pytest tests/ --codspeed
diff --git a/examples/rust-cargo-codspeed.yml b/examples/rust-cargo-codspeed.yml
index e93f6ab..b9f9e27 100644
--- a/examples/rust-cargo-codspeed.yml
+++ b/examples/rust-cargo-codspeed.yml
@@ -32,5 +32,5 @@ jobs:
       - name: Run the benchmarks
         uses: CodSpeedHQ/action@v4
         with:
-          mode: instrumentation
+          mode: simulation
           run: cargo codspeed run