| Feature | Gemini macOS (July 29) | ChatGPT Desktop (July 23) | Apple Intelligence (Siri) |
|---|---|---|---|
| Trigger | Long-press Fn key | In-app voice button / keyboard shortcut | "Hey Siri" or button |
| Scope | System-wide, any window | Inside ChatGPT app (Work/Codex agents) | System-wide via Siri |
| Screen awareness | Yes, opt-in | Yes (via Work/Codex agents, Appshots on macOS) | Limited (on-screen context in some apps) |
| Voice model | Gemini's transcription + reasoning | GPT-Live-1 (two-way, interruptible) | On-device Siri models |
| Two-way conversation | Dictation-focused; not full duplex | Full duplex (speak + listen simultaneously) | One-shot queries |
| Desktop automation | Via Screen Awareness commands | Direct agent control (Codex, Work) | Shortcuts + app intents |
| Platform | macOS only (this week) | macOS + Windows | macOS, iOS, iPadOS (Apple ecosystem) |
Key differentiators: ChatGPT Desktop's GPT-Live-1 is a true conversational voice mode — it can listen and speak at the same time, handle interruptions, and direct AI agents in real time . Gemini's approach is more task-oriented: dictation plus screen-aware commands rather than fluid back-and-forth chat. Apple Intelligence is deeply on-device and system-integrated but lacks the generative depth and cross-app autonomy of Gemini or ChatGPT.