Does CSM 1B support zero data retention?

Yes. CSM 1B is available with zero data retention on DeepInfra through the Opper gateway.

Where is CSM 1B hosted?

CSM 1B runs on US hosting routes through the Opper gateway.

Is CSM 1B trained on prompts and outputs?

No. Every hosting route for CSM 1B is configured so customer prompts and outputs are not used to train models by default.

Is a GDPR DPA available for CSM 1B?

Yes. A GDPR Data Processing Agreement is available on at least one route serving CSM 1B. Contact hello@opper.ai to receive it.

CSM 1B

by Sesame

Sesame CSM 1B: conversational speech model that generates natural speech from text and audio inputs, using prior turns as context for expressive responses.

Call CSM 1B on Opper with the OpenAI SDK. Sign up without a credit card. Get started

Get your API key Try in chat Compare

Key info

Input

Output

Features

Pricing

$7.00 / 1M chars

Billing

Per 1M characters

US residency available
Zero data retention on pay-as-you-go
No training by default
GDPR DPA available

Pricing

Usage-based pricing, billed by characters, not by token.

Variant	Price
Standard	$7.00 / 1M chars

Available routes

CSM 1B runs on 1 route through the Opper gateway. Compare residency, zero data retention and training posture at a glance, with full data-handling detail per route below.

Provider	Region	Zero data retention	Training	Price
DeepInfra	US		No	$7.00 / 1M chars

Live routes and prices as JSON: api.opper.ai/v3/models?q=deepinfra%2Fsesame%2Fcsm-1b

Uptime and availability

CSM 1B runs on a single route through the Opper gateway today, so its availability is that provider's availability.

100%route uptime, last 30 days

Single route, no failover target within this model.

Name a second model in the same request and the gateway tries it on retriable errors, so a busy hour never has to reach your users. Set up a fallback chain.

Measured over the last 30 days from each provider's official status feed via StatusGator. Refreshed hourly. See uptime for every provider Opper monitors.

Data handling per route

Each route hosting CSM 1B has its own privacy posture, residency, and GDPR terms. Postures are maintained by Opper with a last-verification timestamp.

DeepInfra — United States🇺🇸

Zero data retention: nothing is logged, held for abuse monitoring or used for training. No training on customer data. US; unknown; DPA available.

Zero data retention: Yes. Nothing is logged, held for abuse monitoring or used for training.
Training: No training on customer data.
Logging: None
Abuse monitoring: No classifier
GDPR DPA: DPA available
Transfer mechanism: unknown

Get started

Call CSM 1B through the Opper gateway with one API key. Opper is drop-in compatible with the OpenAI, Anthropic and Google AI SDKs.

CSM 1B is a premium model on Opper. Sign up needs no credit card: you get an API key straight away and the free models work in the playground and the API. Add a card to use premium models, pay-as-you-go with no minimum.

Set it up with your agent

Copy this and paste it into a coding agent like Claude Code, Cursor or Codex and it'll wire up Opper for you.

Or call it directly

1import OpenAI from "openai";
2
3const client = new OpenAI({
4  apiKey: process.env.OPPER_API_KEY,
5  baseURL: "https://api.opper.ai/v3/compat",
6});
7
8const completion = await client.chat.completions.create({
9  model: "deepinfra/sesame/csm-1b",
10  messages: [{ role: "user", content: "Hello" }],
11});
12console.log(completion.choices[0].message.content);