Pick MacWhisper (free / one-time Pro license) when you need to drag-and-drop pre-recorded MP3, WAV, or video files for fast offline batch transcription and `.srt` subtitle export, or Superwhisper for system-wide cursor dictation. Pick GPT Realtime Assistant ($9.99/mo with 2,000 AI credits across iPhone, iPad, and Mac) when you want **live** interactive OpenAI Realtime speech-to-speech dialogue, 2-way spoken translation in 58 languages, live answers while people talk, screenshot/window vision, AND offline Whisper Large v3 Turbo + Qwen 3 8B on Apple Silicon Macs.
| Capability | GPT Realtime Assistant (v1.2) | MacWhisper | Apple Voice Memos / Notes |
|---|---|---|---|
| Batch transcribe pre-recorded MP3 / WAV / MP4 files | No — processes live sessions only (no post-hoc audio file import) | Yes — best-in-class drag-and-drop batch file transcription & `.srt`/`.vtt` | Yes — transcribes saved Voice Memos on iOS/macOS |
| Live spoken AI conversation with natural barge-in | Yes — OpenAI Realtime speech-to-speech stream | No — transcription & post-transcript text summary focus | No AI conversation |
| Live 2-way spoken interpreter (58 languages) | Yes — locks exact Language A & B and speaks translations aloud | Translates transcripts to text (not a live 2-way spoken interpreter) | No |
| Live contextual answers *during* the conversation | Yes — Brief/Balanced/Detailed answers + 17 room templates live | AI prompts run primarily over completed/captured text | Post-recording summary only (Apple Intelligence) |
| Offline local Whisper + local LLM on Apple Silicon | Yes — Whisper Large v3 Turbo + Qwen 3 8B bundled (0 credits) | Yes — local Whisper models + optional Ollama/cloud LLM hookup | On-device Apple Speech transcript |
| Multimodal screenshot & Mac window vision | Yes — attach screenshots, photos, or live Mac windows | Audio/video transcript tool (no vision Q&A) | No vision Q&A |
| Universal iPhone + iPad + Mac app | Yes — one subscription covers iPhone, iPad, and Mac | macOS app (separate iOS Whisper transcription apps) | Built into iOS, iPadOS, and macOS |
The Crucial Distinction: Live Interactive Stream vs Batch File Transcriber
We state this upfront so nobody installs the wrong tool: **GPT Realtime Assistant does not transcribe pre-recorded audio files after the fact.** If a colleague emails you a 90-minute `.mp3` interview from a Zoom H6 recorder and asks for a timestamped `.srt` subtitle file, MacWhisper is purpose-built for that job and does it brilliantly.
GPT Realtime Assistant is built for the live moment itself—when people are speaking right now and you need a live transcript alongside instant `Brief` answers, screenshot/window analysis, or two-way spoken interpretation across 58 languages.
Turnkey Offline Whisper + Qwen 3 8B on Apple Silicon
On an M-series Mac, MacWhisper handles local speech-to-text, and power users often pair it with a separate local Ollama server if they want offline LLM summaries. GPT Realtime Assistant bundles both `Whisper Large v3 Turbo` and `Qwen 3 8B` inside a single one-time download in Settings—giving you offline live transcription and written answers in one unified workspace for zero credits.
| Technical Dimension | GPT Realtime Assistant | MacWhisper |
|---|---|---|
| Input audio sources | Live iPhone/iPad/Mac mic + live Mac system audio | Imported audio/video files, mic recording, and Mac system audio (Pro) |
| Subtitle file export (`.srt` / `.vtt`) | Focused on session transcripts, Projects, Tasks & Notes (not `.srt` authoring) | Full timestamped `.srt`, `.vtt`, `.csv`, and speaker-review editor |
| Offline Apple Silicon setup | One-click in-app download of Whisper Large v3 Turbo + Qwen 3 8B | One-click Whisper model downloads; local LLM requires external Ollama/LM Studio |
| Data storage | 100% local transcripts, Tasks & Notes on device | 100% local files on Mac unless cloud API key configured |
| Pricing model | $9.99/mo subscription (includes 2,000 cloud AI credits + iOS/iPad/Mac) | Free tier + one-time Pro upgrade (user brings own cloud API keys if desired) |
Seamless Transition From Mac Desk to iPhone Pocket
Because GPT Realtime Assistant is a universal Apple app, the same $9.99/month subscription that powers your Mac window/system-audio workspace also gives you 2,000 monthly cloud Realtime credits on your iPhone and iPad when you travel.
| Workflow | Best Choice | Why It Wins |
|---|---|---|
| Generating `.srt` captions for 20 recorded podcast episodes | MacWhisper | GPT Realtime Assistant does not import pre-recorded audio files |
| Getting live answers, slide Q&A & action items *while* a call is happening | GPT Realtime Assistant | Built for real-time in-the-moment assistance across iPhone, iPad & Mac |
| Interpreting a face-to-face conversation aloud across 58 languages | GPT Realtime Assistant | Spoken bidirectional OpenAI Realtime voice translation |
| Turnkey offline Whisper + Qwen 3 8B on Mac without configuring Ollama | GPT Realtime Assistant | Downloads both speech and 8B language models inside one app |
Frequently Asked Questions
Can I import an existing Voice Memo or MP3 into GPT Realtime Assistant?
No. GPT Realtime Assistant works strictly during live active sessions via your microphone (and Mac system audio on macOS). Use MacWhisper or Apple Voice Memos for pre-recorded audio files.
Does offline mode on Apple Silicon Mac require installing Ollama or Python?
No. With an active subscription on an M-series Mac, you download Whisper Large v3 Turbo and Qwen 3 8B directly inside GPT Realtime Assistant with one click.
Does offline Mac mode speak answers aloud or write them on screen?
Offline local Whisper + Qwen mode produces live transcription and written text answers on screen for zero credits; spoken Realtime voice output uses online OpenAI Realtime sessions.
Related Comparisons & Session Guide
Speech-to-Speech Realtime API vs STT-LLM-TTS Voice Pipelines
Compare native Speech-to-Speech Realtime API streaming vs cascaded STT → LLM → TTS voice pipelines on latency, barge-in, cost, and offline Apple Silicon AI.
WebRTC vs WebSockets for Realtime Voice AI on iOS & Mac
Compare WebRTC vs WebSockets for OpenAI Realtime Voice AI on iPhone, iPad, and Mac: packet-loss resilience, echo cancellation, ephemeral tokens, and latency.
