Cartesia Sonic 2

Cartesia Sonic 2 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

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

Price against its peers

Provider list prices per M characters, Cartesia Sonic 2 against its nearest speech peers by price.

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.

Cartesia Sonic 2 is served over API. Route traffic to it by name, meter every token, and swap it out in one click when a better fit ships.

Example usage

Point a route at cartesia/sonic-2 and the endpoint never changes; swap the model behind it whenever you want.

curl https://api.allocate.network/v1/chat/completions \
  -H "Authorization: Bearer $ALLOCATE_KEY" \
  -d '{
    "model": "cartesia/sonic-2",
    "messages": [{"role": "user",
      "content": "Summarise the attached contract."}]
  }'

Common questions