opendunes

CSM 1B

by SesameReleased 23 April 2026

Sesame's 1B conversational speech model, which speaks English for voice assistants and interactive agents, with seven voices split between a natural conversational style and a read-aloud style

TakesText
GivesAudio
Open in chatCreate API keyCompare

What it costs

You pay for what each request uses. No subscription, no minimum.

≈ 1,40 DA per paragraph read aloud3 000 DA buys about 2 100 paragraphs read aloud

One paragraph read aloud, the ordinary use

600 characters sent× 2 329,85 DA per 1M1,40 DA
Total≈ 1,40 DA

Every rate

Meter↑ you send↓ comes back
Characters2 329,85 DA

per 1M characters

Voice an order confirmation≈ 0,47 DA
Voice a chatbot reply≈ 0,58 DA
Record a phone menu greeting≈ 0,70 DA
Read a short product description≈ 1,17 DA
Read a 600-character paragraph aloud≈ 1,40 DA
When you pay
After the answer, from your balance. Nothing is held.
Why it varies
The length of the text.
After each one
The exact charge shows on the request.
DepositDeposits from 50 DA, with Edahabia or CIB.

Where your request runs

One company runs this model. OpenDunes sends every request to it. DA per 1M characters: ↑ what you send.

DeepInfraUnited States…
↑
2 329,85
Latency
…
Provider↑ SentLatencyUptime
DeepInfraUnited States2 329,85……

You pay the price of the provider that served your request. Prices read 15:48 · speed over the last 30 minutes · uptime over 3 days.

Call it in code

Swap the base URL and the key. Your OpenAI code runs unchanged.

POST /v1/audio/speech
Base URL
https://opendunes.com/v1
Model ID
sesame/csm-1b
import os
from openai import OpenAI

client = OpenAI(
    base_url="https://opendunes.com/v1",
    api_key=os.environ["OPENDUNES_API_KEY"],
)

with client.audio.speech.with_streaming_response.create(
    model="sesame/csm-1b",
    input="مرحبا بكم في متجرنا. التوصيل مجاني في وهران.",
    voice="conversational_a",
) as resp:
    resp.stream_to_file("speech.mp3")
pip install openaiFull reference for this route
Sign in to run it

Runs this request once on your balance.

Questions about CSM 1B

  • How much does CSM 1B cost in dinars?

    About 1,40 DA per paragraph read aloud. ↑ 2 329,85 DA per 1M characters.

  • Is CSM 1B free? Can I try it?

    No. You pay per use from your balance, with no subscription. Try it in Chat at the same price.

  • What is CSM 1B best for?

    Sesame's 1B conversational speech model, which speaks English for voice assistants and interactive agents, with seven voices split between a natural conversational style and a read-aloud style.

  • How do I pay for CSM 1B without an international card?

    Deposit dinars with your Edahabia or CIB card. Every model, CSM 1B included, is paid from that balance. No foreign card, no conversion.

  • Does CSM 1B work in Arabic, French or Darja?

    Sesame names no languages for CSM 1B. Arabic, French and Darja: not stated.

  • How many voices, and can it clone mine?

    7 voices. Cloning from a sample: not stated.

  • Who makes CSM 1B, and when was it released?

    Sesame. Released 23 April 2026.