From fcb61c7154125aa7114d7dfd9879d3dc0d99461d Mon Sep 17 00:00:00 2001
From: Peter Dave Hello <hsu@peterdavehello.org>
Date: Wed, 25 Feb 2026 05:19:47 +0800
Subject: [PATCH 1/3] Add OpenAI's GPT-5.3-Codex model support

Reference:
- https://openai.com/index/introducing-gpt-5-3-codex/
- https://developers.openai.com/api/docs/models/gpt-5.3-codex
---
 packages/types/src/providers/openai.ts         | 18 ++++++++++++++++++
 .../providers/__tests__/openai-native.spec.ts  | 13 +++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/packages/types/src/providers/openai.ts b/packages/types/src/providers/openai.ts
index af9a1ff759c..4ccdab79c71 100644
--- a/packages/types/src/providers/openai.ts
+++ b/packages/types/src/providers/openai.ts
@@ -63,6 +63,24 @@ export const openAiNativeModels = {
 		description:
 			"GPT-5.2 Codex: Our most intelligent coding model optimized for long-horizon, agentic coding tasks",
 	},
+	"gpt-5.3-codex": {
+		maxTokens: 128000,
+		contextWindow: 400000,
+		includedTools: ["apply_patch"],
+		excludedTools: ["apply_diff", "write_to_file"],
+		supportsImages: true,
+		supportsPromptCache: true,
+		promptCacheRetention: "24h",
+		supportsReasoningEffort: ["low", "medium", "high", "xhigh"],
+		reasoningEffort: "medium",
+		inputPrice: 1.75,
+		outputPrice: 14.0,
+		cacheReadsPrice: 0.175,
+		supportsTemperature: false,
+		tiers: [{ name: "priority", contextWindow: 400000, inputPrice: 3.5, outputPrice: 28.0, cacheReadsPrice: 0.35 }],
+		description:
+			"GPT-5.3 Codex: Our most intelligent coding model optimized for long-horizon, agentic coding tasks",
+	},
 	"gpt-5.2-chat-latest": {
 		maxTokens: 16_384,
 		contextWindow: 128_000,
diff --git a/src/api/providers/__tests__/openai-native.spec.ts b/src/api/providers/__tests__/openai-native.spec.ts
index ac50e6b0a1c..fefccbe3ab1 100644
--- a/src/api/providers/__tests__/openai-native.spec.ts
+++ b/src/api/providers/__tests__/openai-native.spec.ts
@@ -236,6 +236,19 @@ describe("OpenAiNativeHandler", () => {
 			expect(modelInfo.info.contextWindow).toBe(1047576)
 		})
 
+		it("should return GPT-5.3 Codex model info when selected", () => {
+			const codexHandler = new OpenAiNativeHandler({
+				...mockOptions,
+				apiModelId: "gpt-5.3-codex",
+			})
+
+			const modelInfo = codexHandler.getModel()
+			expect(modelInfo.id).toBe("gpt-5.3-codex")
+			expect(modelInfo.info.maxTokens).toBe(128000)
+			expect(modelInfo.info.contextWindow).toBe(400000)
+			expect(modelInfo.info.supportsReasoningEffort).toEqual(["low", "medium", "high", "xhigh"])
+		})
+
 		it("should handle undefined model ID", () => {
 			const handlerWithoutModel = new OpenAiNativeHandler({
 				openAiNativeApiKey: "test-api-key",

From 522ef43a520ee2642c73a62cc400c8de132cebd9 Mon Sep 17 00:00:00 2001
From: Hannes Rudolph <hrudolph@gmail.com>
Date: Tue, 24 Feb 2026 14:25:28 -0700
Subject: [PATCH 2/3] chore: add changeset for GPT-5.3-Codex support

---
 .changeset/gpt-5-3-codex.md | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 .changeset/gpt-5-3-codex.md

diff --git a/.changeset/gpt-5-3-codex.md b/.changeset/gpt-5-3-codex.md
new file mode 100644
index 00000000000..8b40d2a2ca8
--- /dev/null
+++ b/.changeset/gpt-5-3-codex.md
@@ -0,0 +1,5 @@
+---
+"roo-cline": patch
+---
+
+Add OpenAI's GPT-5.3-Codex model support

From 2e68a13cf7d24b599b14badc04286b29c8705c17 Mon Sep 17 00:00:00 2001
From: Robot Tom <bot@example.com>
Date: Tue, 24 Feb 2026 14:30:45 -0700
Subject: [PATCH 3/3] fix: rename CodeAccordian to CodeAccordion in
 FileChangesPanel

---
 webview-ui/src/__tests__/FileChangesPanel.spec.tsx  | 2 +-
 webview-ui/src/components/chat/FileChangesPanel.tsx | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/webview-ui/src/__tests__/FileChangesPanel.spec.tsx b/webview-ui/src/__tests__/FileChangesPanel.spec.tsx
index 9c5535fb7b3..2208bc127d1 100644
--- a/webview-ui/src/__tests__/FileChangesPanel.spec.tsx
+++ b/webview-ui/src/__tests__/FileChangesPanel.spec.tsx
@@ -25,7 +25,7 @@ vi.mock("react-i18next", () => ({
 }))
 
 // Lightweight mock so we don't pull in CodeBlock/DiffView
-vi.mock("@src/components/common/CodeAccordian", () => ({
+vi.mock("@src/components/common/CodeAccordion", () => ({
 	default: ({
 		path,
 		isExpanded,
diff --git a/webview-ui/src/components/chat/FileChangesPanel.tsx b/webview-ui/src/components/chat/FileChangesPanel.tsx
index 7dec194e0c0..044585efe15 100644
--- a/webview-ui/src/components/chat/FileChangesPanel.tsx
+++ b/webview-ui/src/components/chat/FileChangesPanel.tsx
@@ -10,7 +10,7 @@ import { cn } from "@/lib/utils"
 import { vscode } from "@src/utils/vscode"
 
 import { fileChangesFromMessages, type FileChangeEntry } from "./utils/fileChangesFromMessages"
-import CodeAccordian from "../common/CodeAccordian"
+import CodeAccordion from "../common/CodeAccordion"
 
 interface FileChangesPanelProps {
 	clineMessages: ClineMessage[] | undefined
@@ -151,7 +151,7 @@ const FileChangesPanel = memo(({ clineMessages, className }: FileChangesPanelPro
 						const isExpanded = expandedPaths.has(path)
 						return (
 							<div key={path} className="rounded border border-vscode-panel-border overflow-hidden">
-								<CodeAccordian
+								<CodeAccordion
 									path={path}
 									code={displayDiff}
 									language="diff"