Skip to content

Sesame · Audio

CSM 1B API pricing

sesame/csm-1b

Conversational text-to-speech. CSM 1B by Sesame, routed through INFRO on a Sesame account you connect — alongside every other provider you run. Sesame bills you for it directly, on that account and at your own rate. INFRO adds routing, failover, request logs, cost attribution and policy around it, and takes no part of what you pay Sesame.

Pricing

Per 1M charsUSD · updated 2026-10-05

Sesame rate

$7.00

per 1M chars, billed to you by Sesame

INFRO adds

$0

0% markup on model spend

Calling CSM 1B

POST /v1/audio/speech
import os
from infro import Infro

client = Infro(api_key=os.environ["INFRO_API_KEY"])

audio = client.audio.speech.create(
    model="sesame/csm-1b",
    input="Every AI model, one API.",
)

What this modality supports

  • Text to speech
  • Music generation
  • Transcription
  • Diarization

Text-to-speech with streaming playback, full-track music generation, and transcription with timestamps and diarization. Billed per character generated, per track, and per hour transcribed.

QuickstartGet a key

Alternatives for conversational text-to-speech

Same modality, nearest in price. All of them share the request shape above, so comparing them is a one-word change.

Work out what CSM 1B would cost you

Put your current spend on this model into the calculator and see the same workload priced here — or have us read your real usage.

Price your workloadFree price estimate