Pricing
The app itself is free according to the homepage FAQ. Autocomplete is free through Codeium, while chat relies on your own GPT-4 API key, so any OpenAI usage costs are billed by OpenAI rather than by Command-G.
Learn moreCommand-G
An Xcode copilot for Apple platform developers
Intermediate
What is Command-G?
Command-G is a developer tool. An Xcode companion app for iOS, macOS and visionOS developers that combines Codeium powered autocomplete with a GPT-4 chat panel, using your own API key and sending requests straight to providers.
Command-G is an AI assistant built specifically for people writing code in Xcode, covering iOS, macOS and visionOS projects. Rather than replacing the editor, it sits alongside Apple's IDE and adds two focused capabilities: inline autocomplete and a ChatGPT chat panel that understands your project context. It is a small, single purpose tool from an independent developer, Olivier Truong, whose background includes work at Stripe and Facebook, and it is distributed as a direct macOS download rather than through the App Store. The autocomplete side is powered by Codeium. As you type, suggestions appear in the editor, which the site positions as most useful for repetitive work and for getting unstuck when you would otherwise open a browser tab and start a conversation with ChatGPT. The homepage sets expectations plainly: latency and quality should be comparable to GitHub Copilot, so this is a convenience layer rather than a new class of model. The chat feature connects to GPT-4 and lets you insert your code as context in the conversation, which keeps you inside Xcode instead of copying snippets back and forth between windows. The audience is clearly Apple platform developers who already pay for or use OpenAI and Codeium accounts. There is no bundled model subscription here: autocomplete is free through Codeium, and chat requires your own GPT-4 API key. That makes the pricing story simple but also puts setup in your hands. Privacy is handled by cutting the middleman out: Command-G's servers never see code or messages, requests go directly to the API providers, and the only server side piece is a thin API for update checks and license management. Telemetry for app usage is absent, and the developer invites users to verify the claims with a proxy tool. Each feature still falls under the privacy policy of the provider behind it, which is worth reading before pointing it at proprietary code. Against alternatives, Command-G is narrower than general purpose coding assistants but more native to Xcode than browser based chat. Developers who want one tool across many editors will find it limiting; those who spend their days in Xcode and want autocomplete plus contextual chat without leaving the IDE are the intended fit.
How do you use Command-G?
1Download the macOS build
Get the current release from the site and confirm your machine runs macOS 12 or later before installing.2Install and launch Command-G
Open the downloaded disk image, move the app into Applications, and start it for the first time.3Open Xcode alongside it
The app works as a companion to Xcode, so keep your project open in Apple's IDE while Command-G runs.4Turn on autocomplete
Start typing in the editor and Codeium powered suggestions appear, useful for repetitive edits and quick inspiration.5Add your GPT-4 API key
Enter an OpenAI API key to unlock the chat panel, then insert code as context when you need help reasoning about it.
Pros and cons
Pros
- Targets Xcode directly, so suggestions and chat appear where the code is writtenAI
- Autocomplete runs on Codeium at no cost to the userAI
- Chat lets you insert project code as context without copying between windowsAI
- Requests go directly to OpenAI and Codeium, with no telemetry on app usageAI
- Simple setup: a direct macOS download rather than a subscription productAI
Cons
- Chat requires your own GPT-4 API key and the associated OpenAI billingAI
- Model quality and latency are explicitly comparable to Copilot, not betterAI
- Available only as a macOS app, with no Windows, Linux or web versionAI
- Covers just two features, with no refactoring, testing or multi-file agent workflowsAI
- Prompts and code are governed by Codeium and OpenAI policies once sentAI
How much does Command-G cost?
Integrations
Works alongside Xcode and connects to two external providers: Codeium for autocomplete and OpenAI GPT-4 for chat, both reached directly from the app.
Features
Two functions: inline autocomplete driven by Codeium for suggestions as you type, and a GPT-4 chat panel integrated with Xcode that lets you drop code in as context. Requests go directly from the app to each API provider, with no telemetry and a minimal server API used only for update checks and license management.
Frequently asked questions about Command-G
How much does Command-G cost?
The app itself is free according to the homepage FAQ. Autocomplete is free through Codeium, while chat relies on your own GPT-4 API key, so any OpenAI usage costs are billed by OpenAI rather than by Command-G.How do you use Command-G?
The walkthrough on this page covers 5 steps: 1. Download the macOS build 2. Install and launch Command-G 3. Open Xcode alongside it 4. Turn on autocomplete 5. Add your GPT-4 API key.What platforms does Command-G support?
Command-G is available on MacOS.What does Command-G integrate with?
Works alongside Xcode and connects to two external providers: Codeium for autocomplete and OpenAI GPT-4 for chat, both reached directly from the app.What are the limitations of Command-G?
Chat requires your own GPT-4 API key and the associated OpenAI billing. Model quality and latency are explicitly comparable to Copilot, not better. Available only as a macOS app, with no Windows, Linux or web version.
