diff --git a/.github/workflows/openclaw-live-and-e2e-checks-reusable.yml b/.github/workflows/openclaw-live-and-e2e-checks-reusable.yml
index 1ddb6745064..0be79eb5039 100644
--- a/.github/workflows/openclaw-live-and-e2e-checks-reusable.yml
+++ b/.github/workflows/openclaw-live-and-e2e-checks-reusable.yml
@@ -2083,7 +2083,7 @@ jobs:
           fi
           case "${{ matrix.suite_id }}" in
             live-cli-backend-docker)
-              echo "OPENCLAW_LIVE_CLI_BACKEND_MODEL=codex-cli/gpt-5.5" >> "$GITHUB_ENV"
+              echo "OPENCLAW_LIVE_CLI_BACKEND_MODEL=codex-cli/gpt-5.4" >> "$GITHUB_ENV"
               # Keep the release-blocking CI lane on Codex API-key auth. The
               # staged auth-file path remains supported for local maintainer
               # reruns, but it can hang on stale subscription/session state in
@@ -2300,7 +2300,7 @@ jobs:
           fi
           case "${{ matrix.suite_id }}" in
             live-cli-backend-docker)
-              echo "OPENCLAW_LIVE_CLI_BACKEND_MODEL=codex-cli/gpt-5.5" >> "$GITHUB_ENV"
+              echo "OPENCLAW_LIVE_CLI_BACKEND_MODEL=codex-cli/gpt-5.4" >> "$GITHUB_ENV"
               echo "OPENCLAW_LIVE_CLI_BACKEND_AUTH=api-key" >> "$GITHUB_ENV"
               echo 'OPENCLAW_LIVE_CLI_BACKEND_ARGS=["exec","--json","--color","never","--sandbox","danger-full-access","-c","service_tier=\"fast\"","--skip-git-repo-check"]' >> "$GITHUB_ENV"
               echo 'OPENCLAW_LIVE_CLI_BACKEND_RESUME_ARGS=["exec","resume","{sessionId}","-c","sandbox_mode=\"danger-full-access\"","-c","service_tier=\"fast\"","--skip-git-repo-check"]' >> "$GITHUB_ENV"
diff --git a/package.json b/package.json
index f01b7b8741a..840e5892dc0 100644
--- a/package.json
+++ b/package.json
@@ -1519,9 +1519,9 @@
     "test:docker:live-cli-backend:claude-subscription": "OPENCLAW_LIVE_CLI_BACKEND_AUTH=subscription OPENCLAW_LIVE_CLI_BACKEND_MODEL=claude-cli/claude-sonnet-4-6 OPENCLAW_LIVE_CLI_BACKEND_DISABLE_MCP_CONFIG=1 OPENCLAW_LIVE_CLI_BACKEND_MODEL_SWITCH_PROBE=0 OPENCLAW_LIVE_CLI_BACKEND_RESUME_PROBE=1 OPENCLAW_LIVE_CLI_BACKEND_IMAGE_PROBE=0 OPENCLAW_LIVE_CLI_BACKEND_MCP_PROBE=0 bash scripts/test-live-cli-backend-docker.sh",
     "test:docker:live-cli-backend:claude:mcp": "OPENCLAW_LIVE_CLI_BACKEND_MODEL=claude-cli/claude-sonnet-4-6 OPENCLAW_LIVE_CLI_BACKEND_MCP_PROBE=1 bash scripts/test-live-cli-backend-docker.sh",
     "test:docker:live-cli-backend:claude:resume": "OPENCLAW_LIVE_CLI_BACKEND_MODEL=claude-cli/claude-sonnet-4-6 OPENCLAW_LIVE_CLI_BACKEND_RESUME_PROBE=1 bash scripts/test-live-cli-backend-docker.sh",
-    "test:docker:live-cli-backend:codex": "OPENCLAW_LIVE_CLI_BACKEND_MODEL=codex-cli/gpt-5.5 bash scripts/test-live-cli-backend-docker.sh",
-    "test:docker:live-cli-backend:codex:mcp": "OPENCLAW_LIVE_CLI_BACKEND_MODEL=codex-cli/gpt-5.5 OPENCLAW_LIVE_CLI_BACKEND_MCP_PROBE=1 bash scripts/test-live-cli-backend-docker.sh",
-    "test:docker:live-cli-backend:codex:resume": "OPENCLAW_LIVE_CLI_BACKEND_MODEL=codex-cli/gpt-5.5 OPENCLAW_LIVE_CLI_BACKEND_RESUME_PROBE=1 bash scripts/test-live-cli-backend-docker.sh",
+    "test:docker:live-cli-backend:codex": "OPENCLAW_LIVE_CLI_BACKEND_MODEL=codex-cli/gpt-5.4 bash scripts/test-live-cli-backend-docker.sh",
+    "test:docker:live-cli-backend:codex:mcp": "OPENCLAW_LIVE_CLI_BACKEND_MODEL=codex-cli/gpt-5.4 OPENCLAW_LIVE_CLI_BACKEND_MCP_PROBE=1 bash scripts/test-live-cli-backend-docker.sh",
+    "test:docker:live-cli-backend:codex:resume": "OPENCLAW_LIVE_CLI_BACKEND_MODEL=codex-cli/gpt-5.4 OPENCLAW_LIVE_CLI_BACKEND_RESUME_PROBE=1 bash scripts/test-live-cli-backend-docker.sh",
     "test:docker:live-cli-backend:gemini": "OPENCLAW_LIVE_CLI_BACKEND_MODEL=google-gemini-cli/gemini-3-flash-preview bash scripts/test-live-cli-backend-docker.sh",
     "test:docker:live-cli-backend:gemini:mcp": "OPENCLAW_LIVE_CLI_BACKEND_MODEL=google-gemini-cli/gemini-3-flash-preview OPENCLAW_LIVE_CLI_BACKEND_MCP_PROBE=1 bash scripts/test-live-cli-backend-docker.sh",
     "test:docker:live-cli-backend:gemini:resume": "OPENCLAW_LIVE_CLI_BACKEND_MODEL=google-gemini-cli/gemini-3-flash-preview OPENCLAW_LIVE_CLI_BACKEND_RESUME_PROBE=1 bash scripts/test-live-cli-backend-docker.sh",
diff --git a/scripts/lib/docker-e2e-scenarios.mjs b/scripts/lib/docker-e2e-scenarios.mjs
index c501f14efad..bdbd43593ef 100644
--- a/scripts/lib/docker-e2e-scenarios.mjs
+++ b/scripts/lib/docker-e2e-scenarios.mjs
@@ -302,7 +302,7 @@ export const tailLanes = [
     "live-cli-backend-codex",
     liveDockerScriptCommand(
       "test-live-cli-backend-docker.sh",
-      "OPENCLAW_LIVE_CLI_BACKEND_MODEL=codex-cli/gpt-5.5",
+      "OPENCLAW_LIVE_CLI_BACKEND_MODEL=codex-cli/gpt-5.4",
     ),
     {
       cacheKey: "cli-backend-codex",
diff --git a/test/scripts/package-acceptance-workflow.test.ts b/test/scripts/package-acceptance-workflow.test.ts
index a618058b25f..92b2fb1df20 100644
--- a/test/scripts/package-acceptance-workflow.test.ts
+++ b/test/scripts/package-acceptance-workflow.test.ts
@@ -298,7 +298,7 @@ describe("package artifact reuse", () => {
     expect(workflow).toContain(
       "inputs.live_suite_filter == '' || inputs.live_suite_filter == matrix.suite_id",
     );
-    expect(workflow).toContain("OPENCLAW_LIVE_CLI_BACKEND_MODEL=codex-cli/gpt-5.5");
+    expect(workflow).toContain("OPENCLAW_LIVE_CLI_BACKEND_MODEL=codex-cli/gpt-5.4");
     expect(workflow).toContain("OPENCLAW_LIVE_CLI_BACKEND_AUTH=api-key");
     expect(workflow).toContain("OPENCLAW_LIVE_CLI_BACKEND_USE_CI_SAFE_CODEX_CONFIG=1");
     expect((workflow.match(/service_tier=\\"fast\\"/g) ?? []).length).toBeGreaterThanOrEqual(2);