What is ChatGPT built with?

Native Swift iOS app with SwiftUI, 11 App Intents, 12 Metal shaders, LiveKit voice, Stripe payments, and modular first-party ChatGPT modules ChatGPT's iOS app is built with C/C++, Metal (shaders), Objective-C, Swift, and bundles 42 third-party SDKs alongside Apple's own frameworks. This page lists the languages, frameworks, SDKs, and capabilities detected in the App Store build.

Which third-party SDKs does ChatGPT use?

We detected 42 third-party SDKs in ChatGPT, grouped by purpose - analytics, crash reporting, payments, networking, and more.

How was ChatGPT's tech stack determined?

By statically inspecting ChatGPT's iOS App Store build - linked libraries, embedded frameworks, Swift package modules, privacy manifests, and entitlements. Nothing is executed and no private data is accessed.

Live from App Store

ChatGPT

OpenAI OpCo, LLC · AI Assistant by OpenAI

Open in App Store

Rating

4.8 (10,133,471)

Price

Free

Version

v1.2026.244

Last updated

Updated Sep 8, 2026

TrackedRanks · 4hTech stackScreensIcons

Build stack

ChatGPT iOS tech stack

Native Swift iOS app with SwiftUI, 11 App Intents, 12 Metal shaders, LiveKit voice, Stripe payments, and modular first-party ChatGPT modules

v1.2026.146 · latest

Languages

Swift

Third-party SDKs

10 categories

Apple frameworks

142 total frameworks

Signals

capabilities, APIs, fonts

Analyzed June 19, 2026Bundle com.openai.chatDetection lower bound

Built withSwift80 SwiftUI80 UIKit80 App Intents41 WidgetKit (widgets)62 ActivityKit (Live Activities)43 StoreKit (in-app purchase)78 PassKit (Wallet / Apple Pay)22 Core Data59 HealthKit6 MapKit34 Vision32

Versionsv1.2026.146 v1.2026.139 Diff

Analysis

What the stack reveals

An automated read of the signals detected on this page - each point links to the evidence below.

Extensive App Intents integration

Notable

Declares 11 App Intents actions including Voice Mode and image queries, plus auto shortcuts for Siri/Spotlight chat initiation.

11 App Intents actions · has_auto_shortcuts · Voice Mode · Ask ChatGPT about an image

Modular first-party codebase

Architecture

Bundles 30+ likely first-party modules such as ChatGPTCodex, ChatGPTCommerce, and ChatGPTAvatar, indicating a large componentized internal structure.

ChatGPTCodex · ChatGPTCommerce · ChatGPTAvatar · likely_first_party_modules

Runtime↓

LiveKit for real-time voice

Dependencies

Integrates LiveKit SDK with a dedicated VoiceScreenSharing extension and AVFoundation, supporting voice mode and screen sharing.

LiveKit · VoiceScreenSharing.appex · AVFoundation (audio/video)

SDKs↓

Custom Metal shaders

Languages & runtime

Ships 12 Metal shader functions alongside MetalKit, indicating custom GPU-accelerated rendering or effects.

12 metal_shader_functions · MetalKit

Runtime↓

Stripe payments and Apple Pay

Monetization

Uses Stripe and LinkKit for payments, plus StoreKit and Apple Pay capability for commerce and in-app purchases.

Stripe · LinkKit · Apple Pay · StoreKit (in-app purchase)

App Attest and Face ID

Security

Links DeviceCheck/App Attest and Local Authentication, with Face ID permission specifically for unlocking Codex.

DeviceCheck / App Attest · Local Authentication (Face ID / Touch ID) · Face ID permission

Signals↓

Build

Build & platform

Compiler, target OS, supported device families, and localization footprint detected from the bundle.

Min iOS

17.0

Built with

Xcode 26.4.1

iphoneos26.4

Devices

iPhone · iPad

Localizations

118 strings in base locale

Runtime

Languages & runtimes

Primary runtimes and language signatures used by the app.

Dependencies

Third-party SDKs

Grouped by purpose. Select any SDK to see other tracked apps that use it; open the ↗ link for its source.

42 of 42 SDKs

SDK	Category	Vendor	Version	Apps	Source
SegmentCustomer data platform / event pipeline.	Analytics	Twilio	-	12
DatadogCoreOfficial Datadog Swift SDK for iOS.	Crash & Performance	DataDog	-	10
LinkKit	Payments	-	6.4.7	2	-
StripePayments and financial infrastructure SDK.	Payments	Stripe	-	17
Auth0Authentication and identity platform.	Authentication	Okta	-	13
APIClient	Networking	-	-	1	-
APICoreМодуль APICore	Networking	BCS-Broker	-	1
Conversations	Messaging	-	-	2	-
ConversationsCore	Messaging	-	-	1	-
Highlight.js	Rendering	-	11.11.1	7	-
HighlightriOS & macOS Syntax Highlighter.	Rendering	raspu	-	2
KaTeX	Rendering	-	-	4	-
KingfisherSwift image downloading and caching.	Rendering	Wei Wang	-	12
LottieRenders After Effects vector animations.	Rendering	Airbnb	4.5.2	138
OAIMarkdown	Rendering	-	-	1	-
LiveKitReal-time audio/video (WebRTC) SDK.	Voice	LiveKit	1.0	4
PhoneNumberKitSwift framework for working with phone numbers	Telephony	marmelroy	-	7
Account	Other	-	-	1	-
CalpicoCore	Other	-	-	1	-
CalpicoCoreUI	Other	-	-	1	-
CodexAppServer	Other	-	-	1	-
CodexRemote	Other	-	-	1	-
CodexRemoteCore	Other	-	-	1	-
CodexRemoteHost	Other	-	-	1	-
CodexRemoteModels	Other	-	-	1	-
CodexRemoteThread	Other	-	-	1	-
DeviceHaptics	Other	-	-	1	-
DevicePhotos	Other	-	-	1	-
EmojiKitEffortless emoji-querying in Swift	Other	dasmer	-	1
Factory	Other	-	-	2	-
FilesA nicer way to handle files & folders in Swift	Other	johnsundell	-	2
FileUploadService	Other	-	-	1	-
OAIDiff	Other	-	-	1	-
OAIStatsig	Other	-	-	1	-
PhoneNumberUI	Other	-	-	1	-
PhoneVerification	Other	-	-	1	-
SharedSettings	Other	-	-	1	-
SwiftCSVCSV parser for Swift	Other	swiftcsv	-	1
SwiftUIStyleguide	Other	-	-	1	-
ThreadsThreads iOS SDK	Other	-	-	2
TransceiverMany-to-Many Communication Using Protocol in Swift	Other	mazenbaddad	-	1
Users	Other	-	-	1	-

42 SDK rows

Apple

Apple frameworks

Native frameworks and system libraries linked into the build.

Extensions

App extensions

5 bundled app extensions for widgets, notifications, share sheets, and Siri intents.

VoiceScreenSharingBroadcast Upload

NotificationServiceExtensionNotification Service

ChatGPTSearchSafariExtensionSafari Web Extension

ShareExtensionShare

WidgetsWidget

Shortcuts

App Intents

Actions exposed to Siri, Shortcuts, and Spotlight through the App Intents framework.

11 actions2 entitiesApp Shortcuts

Interface

UI & graphics

Frameworks and libraries ChatGPT uses to render its interface and animations.

Lottie (animations)SwiftUIUIKit

GPU

Metal shaders

12 custom GPU shader functions across 3 metallib files.

dotVisualOrbfragment_blur_separablefragment_downsamplefragment_glow_additivefragment_mainfragment_speaking_assistant_1fragment_speaking_assistant_prepassfragment_upsample_addmediaGenHalftoneDotsRipplesimpleMeshGradientvertex_blitvertex_main

Assets

Bundled fonts

Custom font families packaged in the app bundle.

LatinModernMath-Regular

Packaging

Build & packaging

Dependency managers and build tooling detected in the app bundle.

Swift Package Manager (SwiftPM)

Embedded web

JavaScript libraries

Detected inside bundled JavaScript from React Native or embedded web content.

Highlight.js KaTeX

Integrations

Services & integrations

Service configuration, URL schemes, universal links, and integration keys observed in the sanitized audit.

Registered URL schemes

chatgptcom.openai.chatopenai

Queries other apps

chatgpt-enterprisecomgooglemapsfacebook-storiesfbfb-messengergooglegmailinstagraminstagram-storieskakaotalklinemapsms-outlooksgnlsnapchatsnssdk1233tgtiktokwhatsapp

Universal link hosts

api.openai.orgchat.comchat.openai.comchatgpt.comclick.openai.comopenai.complatform.openai.coms.openai.comu.email.openai.comwww.chatgpt.com

Network

Backend & API

Backend hosts, GraphQL operations, and certificate pinning signals detected in the app.

Backend hosts

chatgpt.com

First party

App modules

Likely first-party modules and resource bundles detected in ChatGPT.

AccountAssetsCalpicoCoreCalpicoCoreUIChatGPTChatGPTAccountChatGPTAccountLinkingChatGPTAccountRootChatGPTADAVisualizationChatGPTAgeVerificationChatGPTAuthChallengeChatGPTAutomationChatGPTAutomationInterfaceChatGPTAvatarChatGPTBazaarChatGPTBeaconsChatGPTBugReportChatGPTCalpicoChatGPTCanvasChatGPTCarPlayChatGPTCartChatGPTCheckoutChatGPTCitationsChatGPTCodeExecutionChatGPTCodexChatGPTCodexCoreChatGPTCommerceChatGPTCommerceCore

Entitlements

Capabilities

System capabilities and entitlement flags included with the app.

App GroupsApple PayAssociated Domains (Universal Links)Background AudioBackground PushCarPlayCommunication NotificationsHealthKitKeychain SharingPush Notifications (APNs)Sign in with Apple

Privacy

Privacy manifest

Does not declare cross-app tracking in its App Store privacy manifest.

Collected data types

AdvertisingDataApp NameApp VersionDeviceIDPaymentInfoPerformanceDataProductInteractionPurchaseHistoryUserID

Required-reason API categories

FileTimestampSystemBootTimeUserDefaults

Architecture

Architecture details

Additional build and bundle signals that help explain how the app is structured.

Storyboards

Nibs

Scene manifest

Present

Explore technologies across all apps

Browse every SDK, framework, and language we detect, then compare the apps that share the same stack.

App tech stacks →

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