# Cartesia Sonic 3

Cartesia Sonic 3 is a speech model from Cartesia with a 0K-token context window. Provider list price is $65 per M characters; on Allocate you pay $69.55 with the 7% transaction fee. It is a closed model served over API; the weights are not published.

## Pricing

| | Provider list | On Allocate |
| --- | --- | --- |
| Price, per M characters | $65 | $69.55 |

Token usage bills at the provider list price plus the 7% transaction fee. Prices checked 2026-07-08.

## Facts

| Field | Value |
| --- | --- |
| Lab | Cartesia |
| Modality | Speech |
| Context window | 0K tokens |
| License | Proprietary API |
| Open weights | No |
| Fine-tunable | No |
| Catalog id | cartesia/sonic-3 |

## What a real workload costs

Synthesizing 10M characters of speech copy costs 10 × $65 = $650 at list, or $695.50 billed on Allocate with the 7% transaction fee included.

## Common questions

### How much does Cartesia Sonic 3 cost?

Provider list price is $65 per M characters. On Allocate you pay list plus the 7% transaction fee: $69.55.

### What context window does Cartesia Sonic 3 have?

448 tokens (0K). At roughly 0.75 words per token, that is about 0k words of English text per request.

### Can I fine-tune Cartesia Sonic 3?

No. Cartesia Sonic 3 is a closed model served over API; the weights are not published. If you want a model you can train and own, start from an open-weights base in the catalog and fine-tune that.

### How do I call Cartesia Sonic 3 on Allocate?

Send cartesia/sonic-3 in the model field of the OpenAI-compatible endpoint at api.allocate.network/v1, or point a route name (like prod/support-agent) at it so you can swap the model later without a deploy.

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[HTML page](https://allocate.network/models/cartesia-sonic-3) · [Machine-readable catalog](https://allocate.network/catalog.json)