diff --git a/packages/types/src/providers/openai-codex.ts b/packages/types/src/providers/openai-codex.ts
index b79d20d9a7..fd1d80198c 100644
--- a/packages/types/src/providers/openai-codex.ts
+++ b/packages/types/src/providers/openai-codex.ts
@@ -16,7 +16,7 @@ import type { ModelInfo } from "../model.js"
 
 export type OpenAiCodexModelId = keyof typeof openAiCodexModels
 
-export const openAiCodexDefaultModelId: OpenAiCodexModelId = "gpt-5.4-codex"
+export const openAiCodexDefaultModelId: OpenAiCodexModelId = "gpt-5.4"
 
 /**
  * Models available through the Codex OAuth flow.
@@ -24,21 +24,6 @@ export const openAiCodexDefaultModelId: OpenAiCodexModelId = "gpt-5.4-codex"
  * Costs are 0 as they are covered by the subscription.
  */
 export const openAiCodexModels = {
-	"gpt-5.4-codex": {
-		maxTokens: 128000,
-		contextWindow: 1_050_000,
-		includedTools: ["apply_patch"],
-		excludedTools: ["apply_diff", "write_to_file"],
-		supportsImages: true,
-		supportsPromptCache: true,
-		supportsReasoningEffort: ["low", "medium", "high", "xhigh"],
-		reasoningEffort: "medium",
-		inputPrice: 0,
-		outputPrice: 0,
-		supportsTemperature: false,
-		description:
-			"GPT-5.4 Codex: OpenAI's latest flagship coding model with 1M token context via ChatGPT subscription",
-	},
 	"gpt-5.4": {
 		maxTokens: 128000,
 		contextWindow: 1_050_000,
@@ -149,7 +134,7 @@ export const openAiCodexModels = {
 		excludedTools: ["apply_diff", "write_to_file"],
 		supportsImages: true,
 		supportsPromptCache: true,
-		supportsReasoningEffort: ["minimal", "low", "medium", "high"],
+		supportsReasoningEffort: ["none", "low", "medium", "high"],
 		reasoningEffort: "medium",
 		// Subscription-based: no per-token costs
 		inputPrice: 0,
diff --git a/src/api/providers/__tests__/openai-codex.spec.ts b/src/api/providers/__tests__/openai-codex.spec.ts
index a936fc86a4..2e4ad110dd 100644
--- a/src/api/providers/__tests__/openai-codex.spec.ts
+++ b/src/api/providers/__tests__/openai-codex.spec.ts
@@ -10,7 +10,6 @@ describe("OpenAiCodexHandler.getModel", () => {
 		"gpt-5-codex",
 		"gpt-5-codex-mini",
 		"gpt-5.3-codex-spark",
-		"gpt-5.4-codex",
 	])("should return specified model when a valid model id is provided: %s", (apiModelId) => {
 		const handler = new OpenAiCodexHandler({ apiModelId })
 		const model = handler.getModel()
@@ -25,7 +24,7 @@ describe("OpenAiCodexHandler.getModel", () => {
 		const handler = new OpenAiCodexHandler({ apiModelId: "not-a-real-model" })
 		const model = handler.getModel()
 
-		expect(model.id).toBe("gpt-5.4-codex")
+		expect(model.id).toBe("gpt-5.4")
 		expect(model.info).toBeDefined()
 	})
 
@@ -40,17 +39,6 @@ describe("OpenAiCodexHandler.getModel", () => {
 		expect(model.info.reasoningEffort).toBe("none")
 	})
 
-	it("should use GPT-5.4 Codex with 1M token context window", () => {
-		const handler = new OpenAiCodexHandler({ apiModelId: "gpt-5.4-codex" })
-		const model = handler.getModel()
-
-		expect(model.id).toBe("gpt-5.4-codex")
-		expect(model.info.contextWindow).toBe(1_050_000)
-		expect(model.info.reasoningEffort).toBe("medium")
-		expect(model.info.inputPrice).toBe(0)
-		expect(model.info.outputPrice).toBe(0)
-	})
-
 	it("should use Spark-specific limits and capabilities", () => {
 		const handler = new OpenAiCodexHandler({ apiModelId: "gpt-5.3-codex-spark" })
 		const model = handler.getModel()