The speech models in Koi
Every speech model Koi runs on your Mac: Parakeet v3 built in, plus Whisper, Qwen3-ASR, Cohere Transcribe and Granite free to download. 100 languages, offline.
Open System Settings > Keyboard, turn on Dictation, click Edit next to Languages and add Japanese (Japan), then press your Dictation shortcut and speak. Apple lists it for on-device dictation and Auto-punctuation. In Koi, download Whisper, Qwen3-ASR, Cohere Transcribe or Granite Speech first: the built-in model has no Japanese.
By Irakli, founder ·
Built in
Apple Dictation takes Japanese on every Mac, for free. You add Japanese as a Dictation language once, then talk. These steps follow Apple's Dictation guide for macOS 27, and the language lists come from Apple's macOS feature availability page, both checked October 21, 2026.
Apple lists Japanese (Japan) for Dictation, for its “On-Device and Modeless Dictation” (so it can run with no connection once set up), and for Auto-punctuation, which puts in the punctuation for you. Keyboard settings say under Dictation whether your speech is processed on the Mac. For the basics, see how to dictate on a Mac.
Two languages
Add both under Languages. While Dictation is on, click the language shown next to the cursor and pick the other, or press the Globe key if your keyboard has one. Apple Dictation doesn't switch by itself, so each change of language is a click.
You don't need the Japanese input source on to dictate Japanese. Dictation writes the kanji and kana itself, so you can leave your keyboard on English while you talk.
Koi
We make Koi, so read this part with that in mind. Koi is a Mac app whose dictation types in any app, written on your Mac. One thing to know first: the speech model built into Koi, NVIDIA's Parakeet v3, covers 25 European languages and not Japanese. For Japanese you download one of Koi's other models, once, from Settings. After that, it all runs on the Mac.
Koi puts each dictation into the field as text, the way a paste would, so the Japanese input source doesn't need to be on here either. Koi runs on macOS 14 or later, Apple silicon and Intel, and dictation never goes online. More on the dictation page.
Models
Four of Koi's downloadable model families list Japanese, each on its maker's own page. All are free downloads.
| Model | Download | Finds Japanese by itself | Notes |
|---|---|---|---|
| Whisper Base | 85 MB | Yes | The lightest. Can type in English |
| Whisper Small | 270 MB | Yes | Quick. Can type in English |
| Whisper Large v3 Turbo | 886 MB | Yes | OpenAI's most accurate of the three |
| Qwen3-ASR 1.7B | 2.2 GB | Yes | Japanese is on its language list |
| Cohere Transcribe | 2.4 GB | No, pick Japanese | One of its 14 languages |
| Granite Speech 4.1 | 2.6 GB | No, pick Japanese | No punctuation in Koi. Can type in English |
We haven't measured any of them in Japanese, so we won't rank them. A fair way to choose: start with Whisper Large v3 Turbo, then try Qwen3-ASR or Cohere Transcribe on the same paragraph and keep whichever needs fewer fixes. The bigger models run best on Apple silicon; on an older Intel Mac, Whisper Small is the safer pick. The sources are Qwen3-ASR, Cohere Transcribe and Granite Speech 4.1 on Hugging Face, and our post on all seven.
Details
To teach Koi the names you use, see our guide to adding words.
Into English
With Whisper Base, Whisper Small or Granite Speech picked, Koi shows a Type in English switch: you speak Japanese and the words are typed in English, in any app, still on the Mac. IBM lists Japanese to English among Granite's speech translations. Treat the result as a draft and read it before you send it. Our guide to speaking any language and typing in English has the steps.
On calls
On a recorded call, Koi can show what the others say at the bottom of your screen in Japanese, with their own words under it. Turn on “Live captions in my language” in Settings, under Koi, and pick Japanese. It needs macOS 26 or later, and Apple's Translation does it on your Mac. The captions never show in a screen you share. See the live captions page.
Side by side
| Koi | Apple Dictation | |
|---|---|---|
| Price | From $20 a month, or Lifetime | Free with macOS |
| Set up for Japanese | Download a model once | Add Japanese (Japan) |
| Offline | Always, after the download | On-device for Japanese |
| Punctuation | Depends on the model | Auto-punctuation |
| Japanese and English | Found by itself with Whisper or Qwen | Switch by hand |
| Japanese typed as English | Yes, Whisper Base, Small, Granite | No |
Choosing
Koi needs a paid plan. Pro is $20 a month, or $192 a year, after a 3-day free trial that needs a card. Lifetime is paid once, from $59. Dictation is unlimited on every plan. See pricing, the Transcribe page for files, and our guide to fixing Mac dictation if Apple's shortcut does nothing.
Every speech model Koi runs on your Mac: Parakeet v3 built in, plus Whisper, Qwen3-ASR, Cohere Transcribe and Granite free to download. 100 languages, offline.
How to speak your own language and get English text on a Mac: Apple's free dictate-then-translate steps, and dictation that types English as you talk.
See what others say on Zoom, Meet or Teams in your language, translated on your Mac while Koi records the call. macOS 26 or later, nothing sent to translate.
How to use voice to text on Mac with Apple's built-in Dictation, step by step, and when Koi does more: offline, 100 languages, unlimited on every plan.
Support
Try Pro free for 3 days, card needed. Dictation and recorded calls are unlimited on every plan.