diff --git a/.github/workflows/update-sdk-definitions.yaml b/.github/workflows/update-sdk-definitions.yaml
new file mode 100644
index 0000000..376d281
--- /dev/null
+++ b/.github/workflows/update-sdk-definitions.yaml
@@ -0,0 +1,94 @@
+name: Update SDK definitions
+
+on:
+  schedule:
+    - cron: "0 8 * * *" # daily at 08:00 UTC
+  workflow_dispatch:
+  repository_dispatch:
+    types: [update-sdk-definitions]
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  update-definitions:
+    name: Regenerate SDK clients from upstream OpenAPI specs
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          ref: main
+
+      - name: Install uv
+        uses: astral-sh/setup-uv@38f3f104447c67c051c4a08e39b64a148898af3a # v4.2.0
+
+      - name: Install dependencies
+        run: uv sync --group dev
+
+      - name: Regenerate sandbox SDK client
+        run: |
+          echo "Downloading sandbox definition from blaxel-ai/sandbox"
+          curl -sf -o ./definition.yml \
+            "https://raw.githubusercontent.com/blaxel-ai/sandbox/refs/heads/main/sandbox-api/docs/openapi.yml"
+
+          rm -rf src/blaxel/core/sandbox/client/api src/blaxel/core/sandbox/client/models
+          .venv/bin/openapi-python-client generate \
+            --path=definition.yml \
+            --output-path=./tmp-sdk-sandbox \
+            --overwrite \
+            --custom-template-path=./templates \
+            --config=./openapi-python-client.yml
+          cp -r ./tmp-sdk-sandbox/blaxel/* ./src/blaxel/core/sandbox/client
+          rm -rf ./tmp-sdk-sandbox definition.yml
+
+      - name: Regenerate controlplane SDK client
+        run: |
+          echo "Downloading controlplane definition from blaxel-ai/controlplane"
+          curl -sf -o ./definition.yml \
+            "https://api.blaxel.ai/v0/openapi/controlplane.yml"
+
+          rm -rf src/blaxel/core/client/api src/blaxel/core/client/models
+          .venv/bin/openapi-python-client generate \
+            --path=definition.yml \
+            --output-path=./tmp-sdk-python \
+            --overwrite \
+            --custom-template-path=./templates \
+            --config=./openapi-python-client.yml
+          cp -r ./tmp-sdk-python/blaxel/* ./src/blaxel/core/client
+          rm -rf ./tmp-sdk-python definition.yml
+
+      - name: Format and lint
+        run: |
+          uv run ruff format
+          uv run ruff check --fix
+
+      - name: Check for changes
+        id: diff
+        run: |
+          if [ -z "$(git status --porcelain)" ]; then
+            echo "changed=false" >> "$GITHUB_OUTPUT"
+            echo "No definition changes detected"
+          else
+            echo "changed=true" >> "$GITHUB_OUTPUT"
+            echo "Definition changes detected:"
+            git status --short
+          fi
+
+      - name: Create pull request
+        if: steps.diff.outputs.changed == 'true'
+        uses: peter-evans/create-pull-request@84ae59a2cdc2258d6fa0732dd66352dddae2a412 # v7.0.9
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          branch: automated/update-sdk-definitions
+          commit-message: "chore: update SDK definitions from upstream OpenAPI specs"
+          title: "chore: update SDK definitions from upstream OpenAPI specs"
+          body: |
+            Automated PR to sync the generated SDK clients with the latest OpenAPI specs from:
+            - [`blaxel-ai/sandbox`](https://github.com/blaxel-ai/sandbox) (sandbox client)
+            - [`blaxel-ai/controlplane`](https://github.com/blaxel-ai/controlplane) (controlplane client)
+
+            Generated by the **Update SDK definitions** workflow.
+          labels: automated
+          delete-branch: true