Models

Compare Gladia speech-to-text models and choose the right one for your use case.

Pick a model with model in your request. Omit it to use the default: solaria-1.

Choose your model

Solaria-3

Highest accuracy on European real-world audio. Pre-recorded only.

Solaria-1

Default generalist. 100+ languages, async and live, code switching.

Comparison

	Solaria-3	Solaria-1 (default)
Best for	European real-world / business audio	Global coverage across any domain
Modes	Pre-recorded only	Pre-recorded + live
Languages	EN, FR, DE, ES, IT	100+ languages
Code switching	No	Yes
Accuracy	9.6% WER on EN production audio (26% better than Solaria-1)	Strong multilingual; best on clean / formal speech
Audio Intelligence	All add-ons	All add-ons
Pricing	Same plan rates	Same plan rates

Select a model in your API call

Set model to "solaria-3" or "solaria-1":

JavaScript

import { GladiaClient } from "@gladiaio/sdk";

const gladiaClient = new GladiaClient({ apiKey: "YOUR_GLADIA_API_KEY" });

const transcription = await gladiaClient.preRecorded().transcribe(
  "YOUR_AUDIO_URL_OR_LOCAL_PATH",
  {
    model: "solaria-3",
    language_config: {
      languages: ["fr"],
    },
  }
);

With "solaria-3", there is no code switching. You can pass languages in language_config.languages (for example ["fr"], or several from EN/FR/DE/ES/IT) so the model can pick among those covered languages. Once the language is detected, it sticks to it for the rest of the file.

Solaria-3

Highest accuracy on noisy, conversational European audio (calls, meetings, field recordings).

When to use

Use solaria-3 if:

• Audio is pre-recorded
• Language is EN, FR, DE, ES, or IT
• You prioritize accuracy on real production audio
• You can constrain detection to the covered languages (no mid-file switching)

Use Solaria-1 instead for live streaming, code switching, languages outside those five, or clean / formal speech.

Get started

Pre-recorded transcription

Transcribe files with model: "solaria-3".

SDK integration

Call Solaria-3 from JavaScript or Python.

Solaria-1

Maximum language coverage. Works async and live, with code switching.

When to use

Use solaria-1 (or omit model) if:

• You need live / real-time transcription
• You need 100+ languages or code switching
• Audio is clean read-speech or formal / institutional

Ideal default for voice agents, live captions, and global multilingual products.

Get started

Live transcription

Stream audio in real time.

Pre-recorded transcription

Batch-transcribe with the default model.

SDK integration

Integrate with the official SDKs.

Code switching

Handle mixed-language conversations.

Supported languages

Full language list.

Measuring accuracy on your own traffic? See Benchmarking.