diff --git a/oh-my-openagent.claude.jsonc b/oh-my-openagent.claude.jsonc
index 74e59c6..a635169 100644
--- a/oh-my-openagent.claude.jsonc
+++ b/oh-my-openagent.claude.jsonc
@@ -6,16 +6,16 @@
     "oracle": { "model": "openai/gpt-5.5", "variant": "high" },
     "librarian": { "model": "openai/gpt-5.4-mini" },
     "explore": { "model": "openai/gpt-5.4-mini" },
-    "multimodal-looker": { "model": "openai/gpt-5.4", "variant": "medium" },
+    "multimodal-looker": { "model": "openai/gpt-5.5", "variant": "medium" },
     "prometheus": { "model": "anthropic/claude-opus-4-7", "variant": "max" },
     "metis": { "model": "anthropic/claude-opus-4-7", "variant": "max" },
-    "momus": { "model": "openai/gpt-5.4", "variant": "xhigh" },
+    "momus": { "model": "openai/gpt-5.5", "variant": "xhigh" },
     "atlas": { "model": "anthropic/claude-sonnet-4-6" },
     "sisyphus-junior": { "model": "anthropic/claude-sonnet-4-6" }
   },
   "categories": {
     "visual-engineering": { "model": "google/gemini-3.1-pro-preview", "variant": "high" },
-    "ultrabrain": { "model": "openai/gpt-5.4", "variant": "xhigh" },
+    "ultrabrain": { "model": "openai/gpt-5.5", "variant": "xhigh" },
     "deep": { "model": "openai/gpt-5.5", "variant": "medium" },
     "artistry": { "model": "google/gemini-3.1-pro-preview", "variant": "high" },
     "quick": { "model": "openai/gpt-5.4-mini" },
diff --git a/oh-my-openagent.gpt.jsonc b/oh-my-openagent.gpt.jsonc
index c449011..7eaa677 100644
--- a/oh-my-openagent.gpt.jsonc
+++ b/oh-my-openagent.gpt.jsonc
@@ -1,26 +1,26 @@
 {
   "$schema": "https://raw.githubusercontent.com/code-yeongyu/oh-my-openagent/dev/assets/oh-my-opencode.schema.json",
   "agents": {
-    "sisyphus": { "model": "openai/gpt-5.4", "variant": "medium" },
+    "sisyphus": { "model": "openai/gpt-5.5", "variant": "medium" },
     "hephaestus": { "model": "openai/gpt-5.5", "variant": "medium" },
     "oracle": { "model": "openai/gpt-5.5", "variant": "high" },
     "librarian": { "model": "openai/gpt-5.4-mini" },
     "explore": { "model": "openai/gpt-5.4-mini" },
-    "multimodal-looker": { "model": "openai/gpt-5.4", "variant": "medium" },
-    "prometheus": { "model": "openai/gpt-5.4", "variant": "high" },
-    "metis": { "model": "openai/gpt-5.4", "variant": "high" },
-    "momus": { "model": "openai/gpt-5.4", "variant": "xhigh" },
+    "multimodal-looker": { "model": "openai/gpt-5.5", "variant": "medium" },
+    "prometheus": { "model": "openai/gpt-5.5", "variant": "high" },
+    "metis": { "model": "openai/gpt-5.5", "variant": "high" },
+    "momus": { "model": "openai/gpt-5.5", "variant": "xhigh" },
     "atlas": { "model": "ai-gateway/kimi-k2p5-turbo" },
     "sisyphus-junior": { "model": "ai-gateway/kimi-k2p5-turbo" }
   },
   "categories": {
     "visual-engineering": { "model": "google/gemini-3.1-pro-preview", "variant": "high" },
-    "ultrabrain": { "model": "openai/gpt-5.4", "variant": "xhigh" },
+    "ultrabrain": { "model": "openai/gpt-5.5", "variant": "xhigh" },
     "deep": { "model": "openai/gpt-5.5", "variant": "medium" },
     "artistry": { "model": "google/gemini-3.1-pro-preview", "variant": "high" },
     "quick": { "model": "openai/gpt-5.4-mini" },
-    "unspecified-low": { "model": "gpt-5.3-codex", "variant": "medium" },
-    "unspecified-high": { "model": "openai/gpt-5.4", "variant": "high" },
+    "unspecified-low": { "model": "ai-gateway/kimi-k2p5-turbo" },
+    "unspecified-high": { "model": "openai/gpt-5.5", "variant": "high" },
     "writing": { "model": "ai-gateway/kimi-k2p5-turbo" }
   },
   "experimental": {
diff --git a/opencode.jsonc b/opencode.jsonc
index 9e30e97..5a1dcdc 100644
--- a/opencode.jsonc
+++ b/opencode.jsonc
@@ -45,12 +45,6 @@
           "modalities": { "input": ["text", "image", "pdf"], "output": ["text"] },
           "limit": { "context": 1050000, "input": 920000, "output": 130000 }
         },
-        "gpt-5.4": {
-          "name": "GPT-5.4",
-          "reasoning": true,
-          "modalities": { "input": ["text", "image", "pdf"], "output": ["text"] },
-          "limit": { "context": 1050000, "input": 922000, "output": 128000 }
-        },
         "gpt-5.4-mini": {
           "name": "GPT-5.4 mini",
           "reasoning": true,