When was d1.1 released?

Liquid AI released d1.1 on 19 Oct 2026. It is available through the Opper gateway.

Does d1.1 support zero data retention?

Yes. d1.1 is available with zero data retention on Liquid AI through the Opper gateway.

Where is d1.1 hosted?

d1.1 runs on US hosting routes through the Opper gateway.

Is d1.1 trained on prompts and outputs?

No. Every hosting route for d1.1 is configured so customer prompts and outputs are not used to train models by default.

d1.1

by Liquid AI

Released 4 days after D1 Ultra · Announcement · All Liquid AI releases

d1.1 is Liquid AI's default hosted decision model and the successor to d1. You send a state (text or any JSON value) and named questions, and it returns typed answers: the probability that a statement is true, a choice among options you define, or a position on your own rubric, each with a full probability distribution. It reads the input in one forward pass and generates no text, so answers cannot fall outside the options given. It speaks the same request and response format as TypeSafe's System One API, so code written for Jev can switch models by changing the model name, and several questions can be asked about one state in a single request. Use it for high-volume decisions on a hot path: routing and triage, intent detection, guardrail checks and filtering. d1-ultra, its larger sibling, is the choice when accuracy matters more than cost or latency. d1.1 is available through Liquid AI's API; its weights are not published.

Call d1.1 on Opper through the System One evaluation API. Sign up without a credit card. Get started

Get your API key Evaluate via API Compare

Key info

Input

Output

Features

Context window

66K

Max output

—

Input price

$0.02 /1M

Output price

$0 /1M

Released

19 Oct 2026

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

Available routes

d1.1 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	Input	Output	Cache read
Liquid AI	US		No	$0.02	$0	Input price

Live routes and prices as JSON: api.opper.ai/v3/models?q=liquid%2Fd1.1

Data handling per route

Each route hosting d1.1 has its own privacy posture, residency, and GDPR terms. Postures are maintained by Opper with a last-verification timestamp.

Liquid AI — United States🇺🇸

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

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: Keeps nothing
Caching: Not cached
Transfer mechanism: SCCs

Best for

The model directory pages that list d1.1.

Listed inDecision models

Get started

Call d1.1 through the Opper gateway with one API key. Evaluate state against typed questions using TypeSafe’s System One API for yes/no decisions, classification, and rubric scoring.

See the Opper evaluation guide and the TypeSafe API reference for question types and response formats. Compare every decision model, on one API.

d1.1 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

1curl https://api.opper.ai/v3/compat/v1/systemone \
2  -H "Authorization: Bearer $OPPER_API_KEY" \
3  -H "Content-Type: application/json" \
4  -d '{
5    "model": "liquid/d1.1",
6    "state": "The customer cannot sign in and needs help immediately.",
7    "questions": {
8      "is_urgent": {
9        "type": "noul",
10        "instructions": "Does the customer need urgent help?"
11      }
12    }
13  }'