feat(ai): add openai-codex gpt-5.4-mini (#2334)

packages/ai/CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 
+### Added
+
+- Added `gpt-5.4-mini` model support for the `openai-codex` provider with Codex pricing metadata and unit coverage.
+
 ## [0.60.0] - 2026-03-18
 
 ### Fixed

packages/ai/scripts/generate-models.ts

@@ -1005,6 +1005,18 @@ async function generateModels() {
 			contextWindow: CODEX_CONTEXT,
 			maxTokens: CODEX_MAX_TOKENS,
 		},
+		{
+			id: "gpt-5.4-mini",
+			name: "GPT-5.4 Mini",
+			api: "openai-codex-responses",
+			provider: "openai-codex",
+			baseUrl: CODEX_BASE_URL,
+			reasoning: true,
+			input: ["text", "image"],
+			cost: { input: 0.75, output: 4.5, cacheRead: 0.075, cacheWrite: 0 },
+			contextWindow: CODEX_CONTEXT,
+			maxTokens: CODEX_MAX_TOKENS,
+		},
 		{
 			id: "gpt-5.3-codex-spark",
 			name: "GPT-5.3 Codex Spark",

packages/ai/src/models.generated.ts

@@ -2983,24 +2983,6 @@ export const MODELS = {
 			contextWindow: 400000,
 			maxTokens: 128000,
 		} satisfies Model<"openai-responses">,
-		"gpt-5.4-nano": {
-			id: "gpt-5.4-nano",
-			name: "GPT-5.4 nano",
-			api: "openai-responses",
-			provider: "github-copilot",
-			baseUrl: "https://api.individual.githubcopilot.com",
-			headers: {"User-Agent":"GitHubCopilotChat/0.35.0","Editor-Version":"vscode/1.107.0","Editor-Plugin-Version":"copilot-chat/0.35.0","Copilot-Integration-Id":"vscode-chat"},
-			reasoning: true,
-			input: ["text", "image"],
-			cost: {
-				input: 0,
-				output: 0,
-				cacheRead: 0,
-				cacheWrite: 0,
-			},
-			contextWindow: 400000,
-			maxTokens: 128000,
-		} satisfies Model<"openai-responses">,
 		"grok-code-fast-1": {
 			id: "grok-code-fast-1",
 			name: "Grok Code Fast 1",
@@ -5901,6 +5883,23 @@ export const MODELS = {
 			contextWindow: 272000,
 			maxTokens: 128000,
 		} satisfies Model<"openai-codex-responses">,
+		"gpt-5.4-mini": {
+			id: "gpt-5.4-mini",
+			name: "GPT-5.4 Mini",
+			api: "openai-codex-responses",
+			provider: "openai-codex",
+			baseUrl: "https://chatgpt.com/backend-api",
+			reasoning: true,
+			input: ["text", "image"],
+			cost: {
+				input: 0.75,
+				output: 4.5,
+				cacheRead: 0.075,
+				cacheWrite: 0,
+			},
+			contextWindow: 272000,
+			maxTokens: 128000,
+		} satisfies Model<"openai-codex-responses">,
 	},
 	"opencode": {
 		"big-pickle": {