feat(openai-codex): persist and send Fast priority mode

packages/types/src/__tests__/provider-settings.test.ts

@@ -1,4 +1,49 @@
-import { ANTHROPIC_API_PROTOCOL, getApiProtocol, OPENAI_API_PROTOCOL, providerIdentifiers } from "../index.js"
+import { ANTHROPIC_API_PROTOCOL, OPENAI_API_PROTOCOL, providerIdentifiers } from "../index.js"
+import {
+	getApiProtocol,
+	OPEN_AI_CODEX_SERVICE_TIER_KEY,
+	PROVIDER_SETTINGS_KEYS,
+	providerSettingsSchema,
+	providerSettingsSchemaDiscriminated,
+} from "../provider-settings.js"
+import { OpenAiCodexServiceTier, OpenAiServiceTier } from "../model.js"
+
+describe("OpenAI Codex provider settings", () => {
+	it("preserves the Fast preference in general and provider-specific schemas", () => {
+		const settings = {
+			apiProvider: providerIdentifiers.openaiCodex,
+			apiModelId: "gpt-5.6-sol",
+			[OPEN_AI_CODEX_SERVICE_TIER_KEY]: OpenAiCodexServiceTier.Priority,
+		}
+
+		expect(providerSettingsSchema.parse(settings)).toEqual(settings)
+		expect(providerSettingsSchemaDiscriminated.parse(settings)).toEqual(settings)
+		expect(PROVIDER_SETTINGS_KEYS).toContain(OPEN_AI_CODEX_SERVICE_TIER_KEY)
+	})
+
+	it.each([undefined, OpenAiCodexServiceTier.Default])(
+		"accepts %s as the Standard preference",
+		(openAiCodexServiceTier) => {
+			const standardSettings = {
+				apiProvider: providerIdentifiers.openaiCodex,
+				apiModelId: "gpt-5.6-sol",
+				...(openAiCodexServiceTier ? { [OPEN_AI_CODEX_SERVICE_TIER_KEY]: openAiCodexServiceTier } : {}),
+			}
+
+			expect(providerSettingsSchemaDiscriminated.parse(standardSettings)).toEqual(standardSettings)
+		},
+	)
+
+	it("rejects unsupported service tiers", () => {
+		expect(
+			providerSettingsSchemaDiscriminated.safeParse({
+				apiProvider: providerIdentifiers.openaiCodex,
+				apiModelId: "gpt-5.6-sol",
+				[OPEN_AI_CODEX_SERVICE_TIER_KEY]: OpenAiServiceTier.Flex,
+			}).success,
+		).toBe(false)
+	})
+})
 
 describe("getApiProtocol", () => {
 	it("preserves API protocol wire values", () => {

packages/types/src/model.ts

@@ -70,6 +70,18 @@ export const serviceTiers = [OpenAiServiceTier.Default, OpenAiServiceTier.Flex,
 export const serviceTierSchema = z.enum(serviceTiers)
 export type ServiceTier = z.infer<typeof serviceTierSchema>
 
+/**
+ * Service tiers for Codex requests authenticated through a ChatGPT subscription.
+ */
+export const OpenAiCodexServiceTier = {
+	Default: "default",
+	Priority: "priority",
+} as const
+
+export const openAiCodexServiceTiers = [OpenAiCodexServiceTier.Default, OpenAiCodexServiceTier.Priority] as const
+export const openAiCodexServiceTierSchema = z.enum(openAiCodexServiceTiers)
+export type OpenAiCodexServiceTier = z.infer<typeof openAiCodexServiceTierSchema>
+
 /**
  * ModelParameter
  */

packages/types/src/provider-settings.ts

@@ -1,6 +1,12 @@
 import { z } from "zod"
 
-import { modelInfoSchema, reasoningEffortSettingSchema, verbosityLevelsSchema, serviceTierSchema } from "./model.js"
+import {
+	modelInfoSchema,
+	openAiCodexServiceTierSchema,
+	reasoningEffortSettingSchema,
+	verbosityLevelsSchema,
+	serviceTierSchema,
+} from "./model.js"
 import { codebaseIndexProviderSchema } from "./codebase-index.js"
 import {
 	providerIdentifiers,
@@ -38,6 +44,7 @@ import {
  */
 
 export const DEFAULT_CONSECUTIVE_MISTAKE_LIMIT = 3
+export const OPEN_AI_CODEX_SERVICE_TIER_KEY = "openAiCodexServiceTier"
 
 /**
  * DynamicProvider
@@ -279,7 +286,8 @@ const geminiCliSchema = apiModelIdProviderModelSchema.extend({
 })
 
 const openAiCodexSchema = apiModelIdProviderModelSchema.extend({
-	// No additional settings needed - uses OAuth authentication
+	// Codex "Fast" mode maps to the Responses API priority service tier.
+	[OPEN_AI_CODEX_SERVICE_TIER_KEY]: openAiCodexServiceTierSchema.optional(),
 })
 
 const openAiNativeSchema = apiModelIdProviderModelSchema.extend({

src/api/providers/__tests__/openai-codex.spec.ts

@@ -9,6 +9,7 @@ vitest.mock("@roo-code/telemetry", () => ({
 }))
 
 import { Anthropic } from "@anthropic-ai/sdk"
+import { OPEN_AI_CODEX_SERVICE_TIER_KEY, OpenAiCodexServiceTier, SERVICE_TIER_KEY } from "@roo-code/types"
 import { OpenAiCodexHandler, transformLunaResponsesLiteBody } from "../openai-codex"
 import { openAiCodexOAuthManager } from "../../../integrations/openai-codex/oauth"
 
@@ -76,6 +77,84 @@ describe("OpenAiCodexHandler.getModel", () => {
 })
 
 describe("OpenAiCodexHandler.createMessage", () => {
+	afterEach(() => {
+		vitest.restoreAllMocks()
+		vitest.unstubAllGlobals()
+	})
+
+	it("sends the priority service tier in streaming SDK requests when Fast is selected", async () => {
+		const handler = new OpenAiCodexHandler({
+			apiModelId: "gpt-5.6-sol",
+			[OPEN_AI_CODEX_SERVICE_TIER_KEY]: OpenAiCodexServiceTier.Priority,
+		})
+		vitest.spyOn(openAiCodexOAuthManager, "getAccessToken").mockResolvedValue("test-token")
+		vitest.spyOn(openAiCodexOAuthManager, "getAccountId").mockResolvedValue("acct_test")
+		const mockCreate = vitest.fn().mockResolvedValue(createCompletedStream())
+		Reflect.set(handler, "client", { responses: { create: mockCreate } })
+
+		await drainStream(handler.createMessage("System prompt", []))
+
+		const [body] = mockCreate.mock.calls[0]
+		expect(body).toMatchObject({
+			stream: true,
+			[SERVICE_TIER_KEY]: OpenAiCodexServiceTier.Priority,
+		})
+	})
+
+	it.each([
+		["an absent preference", {}],
+		[
+			"an explicit Standard preference from an older profile",
+			{ [OPEN_AI_CODEX_SERVICE_TIER_KEY]: OpenAiCodexServiceTier.Default },
+		],
+	])("omits the service tier in streaming SDK requests for %s", async (_description, serviceTierOptions) => {
+		const handler = new OpenAiCodexHandler({
+			apiModelId: "gpt-5.6-sol",
+			...serviceTierOptions,
+		} as ConstructorParameters<typeof OpenAiCodexHandler>[0])
+		vitest.spyOn(openAiCodexOAuthManager, "getAccessToken").mockResolvedValue("test-token")
+		vitest.spyOn(openAiCodexOAuthManager, "getAccountId").mockResolvedValue("acct_test")
+		const mockCreate = vitest.fn().mockResolvedValue(createCompletedStream())
+		Reflect.set(handler, "client", { responses: { create: mockCreate } })
+
+		await drainStream(handler.createMessage("System prompt", []))
+
+		expect(mockCreate.mock.calls[0][0]).not.toHaveProperty(SERVICE_TIER_KEY)
+	})
+
+	it("preserves the priority service tier in the manual streaming fallback", async () => {
+		const handler = new OpenAiCodexHandler({
+			apiModelId: "gpt-5.6-sol",
+			[OPEN_AI_CODEX_SERVICE_TIER_KEY]: OpenAiCodexServiceTier.Priority,
+		})
+		vitest.spyOn(openAiCodexOAuthManager, "getAccessToken").mockResolvedValue("test-token")
+		vitest.spyOn(openAiCodexOAuthManager, "getAccountId").mockResolvedValue("acct_test")
+		Reflect.set(handler, "client", {
+			responses: { create: vitest.fn().mockRejectedValue(new Error("SDK unavailable")) },
+		})
+		const mockFetch = vitest.fn().mockResolvedValue({
+			ok: true,
+			body: new ReadableStream({
+				start(controller) {
+					controller.enqueue(
+						new TextEncoder().encode(
+							'data: {"type":"response.completed","response":{"output":[],"usage":{"input_tokens":1,"output_tokens":1}}}\n\n',
+						),
+					)
+					controller.close()
+				},
+			}),
+		})
+		vitest.stubGlobal("fetch", mockFetch)
+
+		await drainStream(handler.createMessage("System prompt", []))
+
+		expect(JSON.parse(mockFetch.mock.calls[0][1].body)).toMatchObject({
+			stream: true,
+			[SERVICE_TIER_KEY]: OpenAiCodexServiceTier.Priority,
+		})
+	})
+
 	it("should skip URL-sourced images in formatFullConversation (only base64 emits input_image)", async () => {
 		const handler = new OpenAiCodexHandler({ apiModelId: "gpt-5.1-codex" })
 
@@ -176,6 +255,40 @@ describe("OpenAiCodexHandler.createMessage", () => {
 	})
 })
 
+describe("OpenAiCodexHandler.completePrompt service tier", () => {
+	afterEach(() => {
+		vitest.restoreAllMocks()
+		vitest.unstubAllGlobals()
+	})
+
+	it.each<[string, OpenAiCodexServiceTier | undefined, typeof OpenAiCodexServiceTier.Priority | undefined]>([
+		["Fast", OpenAiCodexServiceTier.Priority, OpenAiCodexServiceTier.Priority],
+		["Standard", undefined, undefined],
+	])("uses the %s preference in non-streaming requests", async (_mode, configuredTier, expectedTier) => {
+		const handler = new OpenAiCodexHandler({
+			apiModelId: "gpt-5.6-sol",
+			...(configuredTier ? { [OPEN_AI_CODEX_SERVICE_TIER_KEY]: configuredTier } : {}),
+		})
+		vitest.spyOn(openAiCodexOAuthManager, "getAccessToken").mockResolvedValue("test-token")
+		vitest.spyOn(openAiCodexOAuthManager, "getAccountId").mockResolvedValue("acct_test")
+		const mockFetch = vitest.fn().mockResolvedValue({
+			ok: true,
+			json: vitest.fn().mockResolvedValue({ text: "Complete" }),
+		})
+		vitest.stubGlobal("fetch", mockFetch)
+
+		await expect(handler.completePrompt("Hello")).resolves.toBe("Complete")
+
+		const body = JSON.parse(mockFetch.mock.calls[0][1].body)
+		expect(body.stream).toBe(false)
+		if (expectedTier) {
+			expect(body[SERVICE_TIER_KEY]).toBe(expectedTier)
+		} else {
+			expect(body).not.toHaveProperty(SERVICE_TIER_KEY)
+		}
+	})
+})
+
 describe("transformLunaResponsesLiteBody", () => {
 	it("creates the exact Responses Lite body while preserving unrelated fields and reasoning", () => {
 		const tools = [{ type: "function", name: "read_file", parameters: { type: "object" } }]

src/api/providers/openai-codex.ts

@@ -5,9 +5,12 @@ import OpenAI from "openai"
 
 import {
 	type ModelInfo,
+	OPEN_AI_CODEX_SERVICE_TIER_KEY,
+	OpenAiCodexServiceTier,
 	openAiCodexDefaultModelId,
 	OpenAiCodexModelId,
 	openAiCodexModels,
+	SERVICE_TIER_KEY,
 	type ReasoningEffort,
 	type ReasoningEffortExtended,
 	ApiProviderError,
@@ -29,6 +32,8 @@ import { t } from "../../i18n"
 
 export type OpenAiCodexModel = ReturnType<OpenAiCodexHandler["getModel"]>
 
+type OpenAiCodexRequestServiceTier = typeof OpenAiCodexServiceTier.Priority
+
 /**
  * OpenAI Codex base URL for API requests
  * Per the implementation guide: requests are routed to chatgpt.com/backend-api/codex
@@ -37,6 +42,11 @@ const CODEX_API_BASE_URL = "https://chatgpt.com/backend-api/codex"
 const LUNA_MODEL_ID = "gpt-5.6-luna"
 const LUNA_CODEX_VERSION = "0.144.0"
 
+const getOpenAiCodexServiceTier = (options: ApiHandlerOptions): OpenAiCodexRequestServiceTier | undefined =>
+	options[OPEN_AI_CODEX_SERVICE_TIER_KEY] === OpenAiCodexServiceTier.Priority
+		? OpenAiCodexServiceTier.Priority
+		: undefined
+
 function stripInputImageDetail(value: any): any {
 	if (Array.isArray(value)) {
 		return value.map(stripInputImageDetail)
@@ -365,6 +375,7 @@ export class OpenAiCodexHandler extends BaseProvider implements SingleCompletion
 			model: string
 			input: Array<{ role: "user" | "assistant"; content: any[] } | { type: string; content: string }>
 			stream: boolean
+			[SERVICE_TIER_KEY]?: OpenAiCodexRequestServiceTier
 			reasoning?: { effort?: ReasoningEffortExtended; summary?: "auto" }
 			temperature?: number
 			store?: boolean
@@ -383,12 +394,14 @@ export class OpenAiCodexHandler extends BaseProvider implements SingleCompletion
 
 		// Per the implementation guide: Codex backend may reject max_output_tokens
 		// and prompt_cache_retention, so we omit them
+		const serviceTier = getOpenAiCodexServiceTier(this.options)
 		const body: ResponsesRequestBody = {
 			model: model.id,
 			input: formattedInput,
 			stream: true,
 			store: false,
 			instructions: systemPrompt,
+			...(serviceTier ? { [SERVICE_TIER_KEY]: serviceTier } : {}),
 			// Only include encrypted reasoning content when reasoning effort is set
 			...(reasoningEffort ? { include: ["reasoning.encrypted_content"] } : {}),
 			...(reasoningEffort
@@ -1261,6 +1274,7 @@ export class OpenAiCodexHandler extends BaseProvider implements SingleCompletion
 			}
 
 			const reasoningEffort = this.getReasoningEffort(model)
+			const serviceTier = getOpenAiCodexServiceTier(this.options)
 
 			const baseRequestBody: any = {
 				model: model.id,
@@ -1272,6 +1286,7 @@ export class OpenAiCodexHandler extends BaseProvider implements SingleCompletion
 				],
 				stream: false,
 				store: false,
+				...(serviceTier ? { [SERVICE_TIER_KEY]: serviceTier } : {}),
 				...(reasoningEffort ? { include: ["reasoning.encrypted_content"] } : {}),
 			}
 

src/core/config/__tests__/ProviderSettingsManager.spec.ts

@@ -2,7 +2,12 @@
 
 import { ExtensionContext } from "vscode"
 
-import type { ProviderSettings } from "@roo-code/types"
+import {
+	OPEN_AI_CODEX_SERVICE_TIER_KEY,
+	OpenAiCodexServiceTier,
+	providerIdentifiers,
+	type ProviderSettings,
+} from "@roo-code/types"
 
 import { ProviderSettingsManager, ProviderProfiles, SyncCloudProfilesResult } from "../ProviderSettingsManager"
 
@@ -451,6 +456,32 @@ describe("ProviderSettingsManager", () => {
 			expect(storedConfig).toEqual(expectedConfig)
 		})
 
+		it.each([OpenAiCodexServiceTier.Default, OpenAiCodexServiceTier.Priority] as const)(
+			"should persist the OpenAI Codex %s speed preference",
+			async (openAiCodexServiceTier) => {
+				mockSecrets.get.mockResolvedValue(
+					JSON.stringify({
+						currentApiConfigName: "default",
+						apiConfigs: { default: {} },
+						modeApiConfigs: {},
+					}),
+				)
+
+				await providerSettingsManager.saveConfig("codex", {
+					apiProvider: providerIdentifiers.openaiCodex,
+					apiModelId: "gpt-5.6-sol",
+					[OPEN_AI_CODEX_SERVICE_TIER_KEY]: openAiCodexServiceTier,
+				})
+
+				const storedProfiles = JSON.parse(mockSecrets.store.mock.calls.at(-1)?.[1])
+				expect(storedProfiles.apiConfigs.codex).toMatchObject({
+					apiProvider: providerIdentifiers.openaiCodex,
+					apiModelId: "gpt-5.6-sol",
+					[OPEN_AI_CODEX_SERVICE_TIER_KEY]: openAiCodexServiceTier,
+				})
+			},
+		)
+
 		it("should only save provider relevant settings", async () => {
 			mockSecrets.get.mockResolvedValue(
 				JSON.stringify({