diff --git a/packages/types/src/providers/openai-codex.ts b/packages/types/src/providers/openai-codex.ts
index f8d9bd25df..3d1bcae4fa 100644
--- a/packages/types/src/providers/openai-codex.ts
+++ b/packages/types/src/providers/openai-codex.ts
@@ -172,6 +172,21 @@ export const openAiCodexModels = {
 		supportsTemperature: false,
 		description: "GPT-5.1 Codex Mini: Faster version for coding tasks via ChatGPT subscription",
 	},
+	"gpt-5.4": {
+		maxTokens: 128000,
+		contextWindow: 1_050_000,
+		includedTools: ["apply_patch"],
+		excludedTools: ["apply_diff", "write_to_file"],
+		supportsImages: true,
+		supportsPromptCache: true,
+		supportsReasoningEffort: ["none", "low", "medium", "high", "xhigh"],
+		reasoningEffort: "none",
+		inputPrice: 0,
+		outputPrice: 0,
+		supportsVerbosity: true,
+		supportsTemperature: false,
+		description: "GPT-5.4: Most capable model via ChatGPT subscription",
+	},
 	"gpt-5.2": {
 		maxTokens: 128000,
 		contextWindow: 400000,