diff --git a/extensions/openai/cli-backend.ts b/extensions/openai/cli-backend.ts
index ed24cfe4c55..7c29b8f8a1c 100644
--- a/extensions/openai/cli-backend.ts
+++ b/extensions/openai/cli-backend.ts
@@ -6,7 +6,7 @@ import {
 import { prepareOpenAICodexCliExecution } from "./openai-codex-cli-bridge.js";
 
 const OPENAI_CODEX_DEFAULT_PROFILE_ID = "openai-codex:default";
-const CODEX_CLI_DEFAULT_MODEL_REF = "codex-cli/gpt-5.4";
+const CODEX_CLI_DEFAULT_MODEL_REF = "codex-cli/gpt-5.5";
 
 export function buildOpenAICodexCliBackend(): CliBackendPlugin {
   return {
diff --git a/extensions/openai/default-models.ts b/extensions/openai/default-models.ts
index eef4757b9d1..7034c2053c0 100644
--- a/extensions/openai/default-models.ts
+++ b/extensions/openai/default-models.ts
@@ -4,8 +4,8 @@ import {
   type OpenClawConfig,
 } from "openclaw/plugin-sdk/provider-onboard";
 
-export const OPENAI_DEFAULT_MODEL = "openai/gpt-5.4";
-export const OPENAI_CODEX_DEFAULT_MODEL = "openai-codex/gpt-5.4";
+export const OPENAI_DEFAULT_MODEL = "openai/gpt-5.5";
+export const OPENAI_CODEX_DEFAULT_MODEL = "openai-codex/gpt-5.5";
 export const OPENAI_DEFAULT_IMAGE_MODEL = "gpt-image-2";
 export const OPENAI_DEFAULT_TTS_MODEL = "gpt-4o-mini-tts";
 export const OPENAI_DEFAULT_TTS_VOICE = "alloy";
diff --git a/extensions/openai/media-understanding-provider.ts b/extensions/openai/media-understanding-provider.ts
index 05ac7906f1e..3fb89248946 100644
--- a/extensions/openai/media-understanding-provider.ts
+++ b/extensions/openai/media-understanding-provider.ts
@@ -34,7 +34,7 @@ export const openaiMediaUnderstandingProvider: MediaUnderstandingProvider = {
 export const openaiCodexMediaUnderstandingProvider: MediaUnderstandingProvider = {
   id: "openai-codex",
   capabilities: ["image"],
-  defaultModels: { image: "gpt-5.4" },
+  defaultModels: { image: "gpt-5.5" },
   describeImage: describeImageWithModel,
   describeImages: describeImagesWithModel,
 };
diff --git a/extensions/openai/openai-codex-provider.ts b/extensions/openai/openai-codex-provider.ts
index 9b5c89a5f23..84c31e7fb25 100644
--- a/extensions/openai/openai-codex-provider.ts
+++ b/extensions/openai/openai-codex-provider.ts
@@ -44,14 +44,30 @@ const PROVIDER_ID = "openai-codex";
 const OPENAI_CODEX_BASE_URL = "https://chatgpt.com/backend-api/codex";
 const OPENAI_CODEX_LOGIN_ASSISTANT_PRIORITY = -30;
 const OPENAI_CODEX_DEVICE_PAIRING_ASSISTANT_PRIORITY = -10;
+const OPENAI_CODEX_GPT_55_MODEL_ID = "gpt-5.5";
+const OPENAI_CODEX_GPT_55_PRO_MODEL_ID = "gpt-5.5-pro";
 const OPENAI_CODEX_GPT_54_MODEL_ID = "gpt-5.4";
 const OPENAI_CODEX_GPT_54_LEGACY_MODEL_ID = "gpt-5.4-codex";
 const OPENAI_CODEX_GPT_54_PRO_MODEL_ID = "gpt-5.4-pro";
 const OPENAI_CODEX_GPT_54_MINI_MODEL_ID = "gpt-5.4-mini";
+const OPENAI_CODEX_GPT_55_NATIVE_CONTEXT_TOKENS = 1_000_000;
+const OPENAI_CODEX_GPT_55_DEFAULT_CONTEXT_TOKENS = 272_000;
 const OPENAI_CODEX_GPT_54_NATIVE_CONTEXT_TOKENS = 1_050_000;
 const OPENAI_CODEX_GPT_54_DEFAULT_CONTEXT_TOKENS = 272_000;
 const OPENAI_CODEX_GPT_54_MINI_CONTEXT_TOKENS = 272_000;
 const OPENAI_CODEX_GPT_54_MAX_TOKENS = 128_000;
+const OPENAI_CODEX_GPT_55_COST = {
+  input: 5,
+  output: 30,
+  cacheRead: 0,
+  cacheWrite: 0,
+} as const;
+const OPENAI_CODEX_GPT_55_PRO_COST = {
+  input: 30,
+  output: 180,
+  cacheRead: 0,
+  cacheWrite: 0,
+} as const;
 const OPENAI_CODEX_GPT_54_COST = {
   input: 2.5,
   output: 15,
@@ -76,6 +92,11 @@ const OPENAI_CODEX_GPT_54_CATALOG_SYNTH_TEMPLATE_MODEL_IDS = [
   ...OPENAI_CODEX_GPT_54_TEMPLATE_MODEL_IDS,
   OPENAI_CODEX_GPT_54_MODEL_ID,
 ] as const;
+const OPENAI_CODEX_GPT_55_TEMPLATE_MODEL_IDS = [
+  OPENAI_CODEX_GPT_54_MODEL_ID,
+  OPENAI_CODEX_GPT_54_PRO_MODEL_ID,
+  ...OPENAI_CODEX_GPT_54_TEMPLATE_MODEL_IDS,
+] as const;
 const OPENAI_CODEX_GPT_54_MINI_TEMPLATE_MODEL_IDS = [
   OPENAI_CODEX_GPT_54_MODEL_ID,
   "gpt-5.1-codex-mini",
@@ -87,6 +108,8 @@ const OPENAI_CODEX_GPT_53_SPARK_CONTEXT_TOKENS = 128_000;
 const OPENAI_CODEX_GPT_53_SPARK_MAX_TOKENS = 128_000;
 const OPENAI_CODEX_TEMPLATE_MODEL_IDS = ["gpt-5.2-codex"] as const;
 const OPENAI_CODEX_XHIGH_MODEL_IDS = [
+  OPENAI_CODEX_GPT_55_MODEL_ID,
+  OPENAI_CODEX_GPT_55_PRO_MODEL_ID,
   OPENAI_CODEX_GPT_54_MODEL_ID,
   OPENAI_CODEX_GPT_54_PRO_MODEL_ID,
   OPENAI_CODEX_GPT_54_MINI_MODEL_ID,
@@ -96,6 +119,8 @@ const OPENAI_CODEX_XHIGH_MODEL_IDS = [
   "gpt-5.1-codex",
 ] as const;
 const OPENAI_CODEX_MODERN_MODEL_IDS = [
+  OPENAI_CODEX_GPT_55_MODEL_ID,
+  OPENAI_CODEX_GPT_55_PRO_MODEL_ID,
   OPENAI_CODEX_GPT_54_MODEL_ID,
   OPENAI_CODEX_GPT_54_PRO_MODEL_ID,
   OPENAI_CODEX_GPT_54_MINI_MODEL_ID,
@@ -169,7 +194,26 @@ function resolveCodexForwardCompatModel(ctx: ProviderResolveDynamicModelContext)
 
   let templateIds: readonly string[];
   let patch: Parameters<typeof cloneFirstTemplateModel>[0]["patch"];
-  if (lower === OPENAI_CODEX_GPT_54_MODEL_ID || lower === OPENAI_CODEX_GPT_54_LEGACY_MODEL_ID) {
+  if (lower === OPENAI_CODEX_GPT_55_MODEL_ID) {
+    templateIds = OPENAI_CODEX_GPT_55_TEMPLATE_MODEL_IDS;
+    patch = {
+      contextWindow: OPENAI_CODEX_GPT_55_NATIVE_CONTEXT_TOKENS,
+      contextTokens: OPENAI_CODEX_GPT_55_DEFAULT_CONTEXT_TOKENS,
+      maxTokens: OPENAI_CODEX_GPT_54_MAX_TOKENS,
+      cost: OPENAI_CODEX_GPT_55_COST,
+    };
+  } else if (lower === OPENAI_CODEX_GPT_55_PRO_MODEL_ID) {
+    templateIds = OPENAI_CODEX_GPT_55_TEMPLATE_MODEL_IDS;
+    patch = {
+      contextWindow: OPENAI_CODEX_GPT_55_NATIVE_CONTEXT_TOKENS,
+      contextTokens: OPENAI_CODEX_GPT_55_DEFAULT_CONTEXT_TOKENS,
+      maxTokens: OPENAI_CODEX_GPT_54_MAX_TOKENS,
+      cost: OPENAI_CODEX_GPT_55_PRO_COST,
+    };
+  } else if (
+    lower === OPENAI_CODEX_GPT_54_MODEL_ID ||
+    lower === OPENAI_CODEX_GPT_54_LEGACY_MODEL_ID
+  ) {
     templateIds = OPENAI_CODEX_GPT_54_CATALOG_SYNTH_TEMPLATE_MODEL_IDS;
     patch = {
       contextWindow: OPENAI_CODEX_GPT_54_NATIVE_CONTEXT_TOKENS,
@@ -476,6 +520,11 @@ export function buildOpenAICodexProviderPlugin(): ProviderPlugin {
         providerId: PROVIDER_ID,
         templateIds: OPENAI_CODEX_GPT_54_CATALOG_SYNTH_TEMPLATE_MODEL_IDS,
       });
+      const gpt55Template = findCatalogTemplate({
+        entries: ctx.entries,
+        providerId: PROVIDER_ID,
+        templateIds: OPENAI_CODEX_GPT_55_TEMPLATE_MODEL_IDS,
+      });
       const gpt54MiniTemplate = findCatalogTemplate({
         entries: ctx.entries,
         providerId: PROVIDER_ID,
@@ -487,6 +536,22 @@ export function buildOpenAICodexProviderPlugin(): ProviderPlugin {
         templateIds: [OPENAI_CODEX_GPT_53_MODEL_ID, ...OPENAI_CODEX_TEMPLATE_MODEL_IDS],
       });
       return [
+        buildOpenAISyntheticCatalogEntry(gpt55Template, {
+          id: OPENAI_CODEX_GPT_55_MODEL_ID,
+          reasoning: true,
+          input: ["text", "image"],
+          contextWindow: OPENAI_CODEX_GPT_55_NATIVE_CONTEXT_TOKENS,
+          contextTokens: OPENAI_CODEX_GPT_55_DEFAULT_CONTEXT_TOKENS,
+          cost: OPENAI_CODEX_GPT_55_COST,
+        }),
+        buildOpenAISyntheticCatalogEntry(gpt55Template, {
+          id: OPENAI_CODEX_GPT_55_PRO_MODEL_ID,
+          reasoning: true,
+          input: ["text", "image"],
+          contextWindow: OPENAI_CODEX_GPT_55_NATIVE_CONTEXT_TOKENS,
+          contextTokens: OPENAI_CODEX_GPT_55_DEFAULT_CONTEXT_TOKENS,
+          cost: OPENAI_CODEX_GPT_55_PRO_COST,
+        }),
         buildOpenAISyntheticCatalogEntry(gpt54Template, {
           id: OPENAI_CODEX_GPT_54_MODEL_ID,
           reasoning: true,
diff --git a/extensions/openai/openai-provider.ts b/extensions/openai/openai-provider.ts
index a49507828a8..b52a87525aa 100644
--- a/extensions/openai/openai-provider.ts
+++ b/extensions/openai/openai-provider.ts
@@ -22,15 +22,21 @@ import {
 } from "./shared.js";
 
 const PROVIDER_ID = "openai";
+const OPENAI_GPT_55_MODEL_ID = "gpt-5.5";
+const OPENAI_GPT_55_PRO_MODEL_ID = "gpt-5.5-pro";
 const OPENAI_GPT_54_MODEL_ID = "gpt-5.4";
 const OPENAI_GPT_54_PRO_MODEL_ID = "gpt-5.4-pro";
 const OPENAI_GPT_54_MINI_MODEL_ID = "gpt-5.4-mini";
 const OPENAI_GPT_54_NANO_MODEL_ID = "gpt-5.4-nano";
+const OPENAI_GPT_55_CONTEXT_TOKENS = 1_000_000;
+const OPENAI_GPT_55_PRO_CONTEXT_TOKENS = 1_000_000;
 const OPENAI_GPT_54_CONTEXT_TOKENS = 1_050_000;
 const OPENAI_GPT_54_PRO_CONTEXT_TOKENS = 1_050_000;
 const OPENAI_GPT_54_MINI_CONTEXT_TOKENS = 400_000;
 const OPENAI_GPT_54_NANO_CONTEXT_TOKENS = 400_000;
 const OPENAI_GPT_54_MAX_TOKENS = 128_000;
+const OPENAI_GPT_55_COST = { input: 5, output: 30, cacheRead: 0, cacheWrite: 0 } as const;
+const OPENAI_GPT_55_PRO_COST = { input: 30, output: 180, cacheRead: 0, cacheWrite: 0 } as const;
 const OPENAI_GPT_54_COST = { input: 2.5, output: 15, cacheRead: 0.25, cacheWrite: 0 } as const;
 const OPENAI_GPT_54_PRO_COST = { input: 30, output: 180, cacheRead: 0, cacheWrite: 0 } as const;
 const OPENAI_GPT_54_MINI_COST = {
@@ -45,11 +51,20 @@ const OPENAI_GPT_54_NANO_COST = {
   cacheRead: 0.02,
   cacheWrite: 0,
 } as const;
+const OPENAI_GPT_55_TEMPLATE_MODEL_IDS = [OPENAI_GPT_54_MODEL_ID, "gpt-5.2"] as const;
+const OPENAI_GPT_55_PRO_TEMPLATE_MODEL_IDS = [
+  OPENAI_GPT_54_PRO_MODEL_ID,
+  OPENAI_GPT_54_MODEL_ID,
+  "gpt-5.2-pro",
+  "gpt-5.2",
+] as const;
 const OPENAI_GPT_54_TEMPLATE_MODEL_IDS = ["gpt-5.2"] as const;
 const OPENAI_GPT_54_PRO_TEMPLATE_MODEL_IDS = ["gpt-5.2-pro", "gpt-5.2"] as const;
 const OPENAI_GPT_54_MINI_TEMPLATE_MODEL_IDS = ["gpt-5-mini"] as const;
 const OPENAI_GPT_54_NANO_TEMPLATE_MODEL_IDS = ["gpt-5-nano", "gpt-5-mini"] as const;
 const OPENAI_XHIGH_MODEL_IDS = [
+  "gpt-5.5",
+  "gpt-5.5-pro",
   "gpt-5.4",
   "gpt-5.4-pro",
   "gpt-5.4-mini",
@@ -57,6 +72,8 @@ const OPENAI_XHIGH_MODEL_IDS = [
   "gpt-5.2",
 ] as const;
 const OPENAI_MODERN_MODEL_IDS = [
+  "gpt-5.5",
+  "gpt-5.5-pro",
   "gpt-5.4",
   "gpt-5.4-pro",
   "gpt-5.4-mini",
@@ -97,14 +114,38 @@ function normalizeOpenAITransport(model: ProviderRuntimeModel): ProviderRuntimeM
   };
 }
 
-function resolveOpenAIGpt54ForwardCompatModel(
+function resolveOpenAIGptForwardCompatModel(
   ctx: ProviderResolveDynamicModelContext,
 ): ProviderRuntimeModel | undefined {
   const trimmedModelId = ctx.modelId.trim();
   const lower = normalizeLowercaseStringOrEmpty(trimmedModelId);
   let templateIds: readonly string[];
   let patch: Partial<ProviderRuntimeModel>;
-  if (lower === OPENAI_GPT_54_MODEL_ID) {
+  if (lower === OPENAI_GPT_55_MODEL_ID) {
+    templateIds = OPENAI_GPT_55_TEMPLATE_MODEL_IDS;
+    patch = {
+      api: "openai-responses",
+      provider: PROVIDER_ID,
+      baseUrl: "https://api.openai.com/v1",
+      reasoning: true,
+      input: ["text", "image"],
+      cost: OPENAI_GPT_55_COST,
+      contextWindow: OPENAI_GPT_55_CONTEXT_TOKENS,
+      maxTokens: OPENAI_GPT_54_MAX_TOKENS,
+    };
+  } else if (lower === OPENAI_GPT_55_PRO_MODEL_ID) {
+    templateIds = OPENAI_GPT_55_PRO_TEMPLATE_MODEL_IDS;
+    patch = {
+      api: "openai-responses",
+      provider: PROVIDER_ID,
+      baseUrl: "https://api.openai.com/v1",
+      reasoning: true,
+      input: ["text", "image"],
+      cost: OPENAI_GPT_55_PRO_COST,
+      contextWindow: OPENAI_GPT_55_PRO_CONTEXT_TOKENS,
+      maxTokens: OPENAI_GPT_54_MAX_TOKENS,
+    };
+  } else if (lower === OPENAI_GPT_54_MODEL_ID) {
     templateIds = OPENAI_GPT_54_TEMPLATE_MODEL_IDS;
     patch = {
       api: "openai-responses",
@@ -202,7 +243,7 @@ export function buildOpenAIProvider(): ProviderPlugin {
         },
       }),
     ],
-    resolveDynamicModel: (ctx) => resolveOpenAIGpt54ForwardCompatModel(ctx),
+    resolveDynamicModel: (ctx) => resolveOpenAIGptForwardCompatModel(ctx),
     normalizeResolvedModel: (ctx) => {
       if (normalizeProviderId(ctx.provider) !== PROVIDER_ID) {
         return undefined;
@@ -234,7 +275,7 @@ export function buildOpenAIProvider(): ProviderPlugin {
       if (ctx.provider !== PROVIDER_ID || ctx.listProfileIds("openai-codex").length === 0) {
         return undefined;
       }
-      return 'No API key found for provider "openai". You are authenticated with OpenAI Codex OAuth. Use openai-codex/gpt-5.4 (OAuth) or set OPENAI_API_KEY to use openai/gpt-5.4.';
+      return 'No API key found for provider "openai". You are authenticated with OpenAI Codex OAuth. Use openai-codex/gpt-5.5 (OAuth) or set OPENAI_API_KEY to use openai/gpt-5.5.';
     },
     suppressBuiltInModel: (ctx) => {
       if (
@@ -249,6 +290,16 @@ export function buildOpenAIProvider(): ProviderPlugin {
       };
     },
     augmentModelCatalog: (ctx) => {
+      const openAiGpt55Template = findCatalogTemplate({
+        entries: ctx.entries,
+        providerId: PROVIDER_ID,
+        templateIds: OPENAI_GPT_55_TEMPLATE_MODEL_IDS,
+      });
+      const openAiGpt55ProTemplate = findCatalogTemplate({
+        entries: ctx.entries,
+        providerId: PROVIDER_ID,
+        templateIds: OPENAI_GPT_55_PRO_TEMPLATE_MODEL_IDS,
+      });
       const openAiGpt54Template = findCatalogTemplate({
         entries: ctx.entries,
         providerId: PROVIDER_ID,
@@ -270,6 +321,18 @@ export function buildOpenAIProvider(): ProviderPlugin {
         templateIds: OPENAI_GPT_54_NANO_TEMPLATE_MODEL_IDS,
       });
       return [
+        buildOpenAISyntheticCatalogEntry(openAiGpt55Template, {
+          id: OPENAI_GPT_55_MODEL_ID,
+          reasoning: true,
+          input: ["text", "image"],
+          contextWindow: OPENAI_GPT_55_CONTEXT_TOKENS,
+        }),
+        buildOpenAISyntheticCatalogEntry(openAiGpt55ProTemplate, {
+          id: OPENAI_GPT_55_PRO_MODEL_ID,
+          reasoning: true,
+          input: ["text", "image"],
+          contextWindow: OPENAI_GPT_55_PRO_CONTEXT_TOKENS,
+        }),
         buildOpenAISyntheticCatalogEntry(openAiGpt54Template, {
           id: OPENAI_GPT_54_MODEL_ID,
           reasoning: true,
diff --git a/extensions/openai/openclaw.plugin.json b/extensions/openai/openclaw.plugin.json
index 99187a4449c..100fed03b2b 100644
--- a/extensions/openai/openclaw.plugin.json
+++ b/extensions/openai/openclaw.plugin.json
@@ -72,7 +72,7 @@
     "openai-codex": {
       "capabilities": ["image"],
       "defaultModels": {
-        "image": "gpt-5.4"
+        "image": "gpt-5.5"
       }
     }
   },
diff --git a/extensions/qa-lab/src/providers/live-frontier/catalog.ts b/extensions/qa-lab/src/providers/live-frontier/catalog.ts
index e0b88519c56..f31f6a9e854 100644
--- a/extensions/qa-lab/src/providers/live-frontier/catalog.ts
+++ b/extensions/qa-lab/src/providers/live-frontier/catalog.ts
@@ -1,5 +1,5 @@
 export const QA_FRONTIER_PROVIDER_IDS = ["anthropic", "google", "openai"] as const;
-export const QA_FRONTIER_CATALOG_PRIMARY_MODEL = "openai/gpt-5.4";
+export const QA_FRONTIER_CATALOG_PRIMARY_MODEL = "openai/gpt-5.5";
 export const QA_FRONTIER_CATALOG_ALTERNATE_MODEL = "anthropic/claude-sonnet-4-6";
 
 export function isPreferredQaLiveFrontierCatalogModel(modelRef: string) {
diff --git a/extensions/qa-lab/src/providers/live-frontier/character-eval.ts b/extensions/qa-lab/src/providers/live-frontier/character-eval.ts
index b344b1d3ff6..571e850180c 100644
--- a/extensions/qa-lab/src/providers/live-frontier/character-eval.ts
+++ b/extensions/qa-lab/src/providers/live-frontier/character-eval.ts
@@ -6,7 +6,7 @@ type QaFrontierCharacterModelOptions = {
 };
 
 export const QA_FRONTIER_CHARACTER_EVAL_MODELS = Object.freeze([
-  "openai/gpt-5.4",
+  "openai/gpt-5.5",
   "openai/gpt-5.2",
   "openai/gpt-5",
   "anthropic/claude-opus-4-6",
@@ -18,19 +18,19 @@ export const QA_FRONTIER_CHARACTER_EVAL_MODELS = Object.freeze([
 
 export const QA_FRONTIER_CHARACTER_THINKING_BY_MODEL: Readonly<Record<string, QaThinkingLevel>> =
   Object.freeze({
-    "openai/gpt-5.4": "xhigh",
+    "openai/gpt-5.5": "xhigh",
     "openai/gpt-5.2": "xhigh",
     "openai/gpt-5": "xhigh",
   });
 
 export const QA_FRONTIER_CHARACTER_JUDGE_MODELS = Object.freeze([
-  "openai/gpt-5.4",
+  "openai/gpt-5.5",
   "anthropic/claude-opus-4-6",
 ]);
 
 export const QA_FRONTIER_CHARACTER_JUDGE_MODEL_OPTIONS: Readonly<
   Record<string, QaFrontierCharacterModelOptions>
 > = Object.freeze({
-  "openai/gpt-5.4": { thinkingDefault: "xhigh" },
+  "openai/gpt-5.5": { thinkingDefault: "xhigh" },
   "anthropic/claude-opus-4-6": { thinkingDefault: "high" },
 });
diff --git a/extensions/qa-lab/src/providers/live-frontier/index.ts b/extensions/qa-lab/src/providers/live-frontier/index.ts
index ac54f7ea368..0613f7f96c6 100644
--- a/extensions/qa-lab/src/providers/live-frontier/index.ts
+++ b/extensions/qa-lab/src/providers/live-frontier/index.ts
@@ -23,7 +23,7 @@ function isClaudeOpusModel(modelRef: string) {
 export const liveFrontierProviderDefinition: QaProviderDefinition = {
   mode: "live-frontier",
   kind: "live",
-  defaultModel: (options) => options?.preferredLiveModel ?? "openai/gpt-5.4",
+  defaultModel: (options) => options?.preferredLiveModel ?? "openai/gpt-5.5",
   defaultImageGenerationProviderIds: ["openai"],
   defaultImageGenerationModel: ({ modelProviderIds }) =>
     modelProviderIds.includes("openai") ? "openai/gpt-image-1" : null,
diff --git a/extensions/qa-lab/src/providers/live-frontier/model-selection.runtime.ts b/extensions/qa-lab/src/providers/live-frontier/model-selection.runtime.ts
index 903d6eb8660..cbfdd252c32 100644
--- a/extensions/qa-lab/src/providers/live-frontier/model-selection.runtime.ts
+++ b/extensions/qa-lab/src/providers/live-frontier/model-selection.runtime.ts
@@ -4,7 +4,7 @@ import {
 } from "openclaw/plugin-sdk/agent-runtime";
 import { resolveEnvApiKey } from "openclaw/plugin-sdk/provider-auth";
 
-const QA_CODEX_OAUTH_LIVE_MODEL = "openai-codex/gpt-5.4";
+const QA_CODEX_OAUTH_LIVE_MODEL = "openai-codex/gpt-5.5";
 
 export function resolveQaLiveFrontierPreferredModel() {
   if (resolveEnvApiKey("openai")?.apiKey) {
diff --git a/extensions/qa-lab/src/providers/live-frontier/parity.ts b/extensions/qa-lab/src/providers/live-frontier/parity.ts
index 887d691f33b..62bcd5556ce 100644
--- a/extensions/qa-lab/src/providers/live-frontier/parity.ts
+++ b/extensions/qa-lab/src/providers/live-frontier/parity.ts
@@ -1,2 +1,2 @@
-export const QA_FRONTIER_PARITY_CANDIDATE_LABEL = "openai/gpt-5.4";
+export const QA_FRONTIER_PARITY_CANDIDATE_LABEL = "openai/gpt-5.5";
 export const QA_FRONTIER_PARITY_BASELINE_LABEL = "anthropic/claude-opus-4-6";
diff --git a/package.json b/package.json
index 8e975efdb97..1ace4865e3a 100644
--- a/package.json
+++ b/package.json
@@ -1437,16 +1437,16 @@
     "test:docker:live-cli-backend": "bash scripts/test-live-cli-backend-docker.sh",
     "test:docker:live-cli-backend:claude": "OPENCLAW_LIVE_CLI_BACKEND_MODEL=claude-cli/claude-sonnet-4-6 bash scripts/test-live-cli-backend-docker.sh",
     "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: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": "OPENCLAW_LIVE_CLI_BACKEND_MODEL=codex-cli/gpt-5.5 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-codex-harness": "bash scripts/test-live-codex-harness-docker.sh",
     "test:docker:live-gateway": "bash scripts/test-live-gateway-models-docker.sh",
     "test:docker:live-gateway:claude": "OPENCLAW_LIVE_GATEWAY_PROVIDERS=claude-cli OPENCLAW_LIVE_GATEWAY_MODELS=claude-cli/claude-sonnet-4-6 bash scripts/test-live-gateway-models-docker.sh",
-    "test:docker:live-gateway:codex": "OPENCLAW_LIVE_GATEWAY_PROVIDERS=codex-cli OPENCLAW_LIVE_GATEWAY_MODELS=codex-cli/gpt-5.4 bash scripts/test-live-gateway-models-docker.sh",
+    "test:docker:live-gateway:codex": "OPENCLAW_LIVE_GATEWAY_PROVIDERS=codex-cli OPENCLAW_LIVE_GATEWAY_MODELS=codex-cli/gpt-5.5 bash scripts/test-live-gateway-models-docker.sh",
     "test:docker:live-gateway:gemini": "OPENCLAW_LIVE_GATEWAY_PROVIDERS=google-gemini-cli OPENCLAW_LIVE_GATEWAY_MODELS=google-gemini-cli/gemini-3.1-pro-preview bash scripts/test-live-gateway-models-docker.sh",
     "test:docker:live-models": "bash scripts/test-live-models-docker.sh",
     "test:docker:live-models:claude": "OPENCLAW_LIVE_PROVIDERS=claude-cli OPENCLAW_LIVE_MODELS=claude-cli/claude-sonnet-4-6 bash scripts/test-live-models-docker.sh",
-    "test:docker:live-models:codex": "OPENCLAW_LIVE_PROVIDERS=codex-cli OPENCLAW_LIVE_MODELS=codex-cli/gpt-5.4 bash scripts/test-live-models-docker.sh",
+    "test:docker:live-models:codex": "OPENCLAW_LIVE_PROVIDERS=codex-cli OPENCLAW_LIVE_MODELS=codex-cli/gpt-5.5 bash scripts/test-live-models-docker.sh",
     "test:docker:live-models:gemini": "OPENCLAW_LIVE_PROVIDERS=google-gemini-cli OPENCLAW_LIVE_MODELS=google-gemini-cli/gemini-3.1-pro-preview bash scripts/test-live-models-docker.sh",
     "test:docker:mcp-channels": "bash scripts/e2e/mcp-channels-docker.sh",
     "test:docker:npm-onboard-channel-agent": "bash scripts/e2e/npm-onboard-channel-agent-docker.sh",
diff --git a/src/agents/defaults.ts b/src/agents/defaults.ts
index af2a945a175..ff4b015a98a 100644
--- a/src/agents/defaults.ts
+++ b/src/agents/defaults.ts
@@ -1,6 +1,6 @@
 // Defaults for agent metadata when upstream does not supply them.
 // Keep this aligned with the product-level latest-model baseline.
 export const DEFAULT_PROVIDER = "openai";
-export const DEFAULT_MODEL = "gpt-5.4";
+export const DEFAULT_MODEL = "gpt-5.5";
 // Conservative fallback used when model metadata is unavailable.
 export const DEFAULT_CONTEXT_TOKENS = 200_000;
diff --git a/src/agents/live-cache-regression-runner.ts b/src/agents/live-cache-regression-runner.ts
index 3ec549941a7..609d81ec0ee 100644
--- a/src/agents/live-cache-regression-runner.ts
+++ b/src/agents/live-cache-regression-runner.ts
@@ -410,7 +410,7 @@ export async function runLiveCacheRegression(): Promise<LiveCacheRegressionResul
     provider: "openai",
     api: "openai-responses",
     envVar: "OPENCLAW_LIVE_OPENAI_CACHE_MODEL",
-    preferredModelIds: ["gpt-5.4-mini", "gpt-5.4", "gpt-5.2"],
+    preferredModelIds: ["gpt-5.5", "gpt-5.4-mini", "gpt-5.4", "gpt-5.2"],
   });
   const anthropic = await resolveLiveDirectModel({
     provider: "anthropic",
diff --git a/src/auto-reply/reply/agent-runner-execution.ts b/src/auto-reply/reply/agent-runner-execution.ts
index cf74be9a135..5278ad1a7d4 100644
--- a/src/auto-reply/reply/agent-runner-execution.ts
+++ b/src/auto-reply/reply/agent-runner-execution.ts
@@ -356,7 +356,7 @@ function buildMissingApiKeyFailureText(message: string): string | null {
     return null;
   }
   if (provider === "openai" && normalizedMessage.includes("OpenAI Codex OAuth")) {
-    return "⚠️ Missing API key for OpenAI on the gateway. Use `openai-codex/gpt-5.4` for OAuth, or set `OPENAI_API_KEY`, then try again.";
+    return "⚠️ Missing API key for OpenAI on the gateway. Use `openai-codex/gpt-5.5` for OAuth, or set `OPENAI_API_KEY`, then try again.";
   }
   if (SAFE_MISSING_API_KEY_PROVIDERS.has(provider)) {
     return `⚠️ Missing API key for provider "${provider}". Configure the gateway auth for that provider, then try again.`;
diff --git a/src/plugins/provider-model-defaults.ts b/src/plugins/provider-model-defaults.ts
index 388cc51064f..8cecb0b4ea5 100644
--- a/src/plugins/provider-model-defaults.ts
+++ b/src/plugins/provider-model-defaults.ts
@@ -6,8 +6,8 @@ export {
 import { ensureModelAllowlistEntry } from "./provider-model-allowlist.js";
 import { applyAgentDefaultPrimaryModel } from "./provider-model-primary.js";
 
-export const OPENAI_DEFAULT_MODEL = "openai/gpt-5.4";
-export const OPENAI_CODEX_DEFAULT_MODEL = "openai-codex/gpt-5.4";
+export const OPENAI_DEFAULT_MODEL = "openai/gpt-5.5";
+export const OPENAI_CODEX_DEFAULT_MODEL = "openai-codex/gpt-5.5";
 export const OPENAI_DEFAULT_IMAGE_MODEL = "gpt-image-2";
 export const OPENAI_DEFAULT_TTS_MODEL = "gpt-4o-mini-tts";
 export const OPENAI_DEFAULT_TTS_VOICE = "alloy";