How much does D1 cost?

On the Respan gateway, D1 costs $0.02 per 1M input tokens and $0.00 per 1M output tokens on OpenRouter, after gateway discounts.

What is D1's context window?

D1 accepts up to 66K tokens of context.

How do I use D1 with the Respan gateway?

Point any OpenAI-compatible SDK at https://api.respan.ai/api/ with your Respan API key and set the model to "d1". To set it up with a coding agent, copy the agent setup prompt at the top of this page.

D1

Q: What is D1?

D1 is a model from Liquid AI, released on Oct 1, 2026. d1 is Liquid AI's structured decision model, served as a System One endpoint. Send a state along with typed questions, and it returns a choice, a score, or a yes/no answer, each with a probability taken directly from the model rather than written out as text. It uses the same /v1/systemone schema as other OpenRouter Decisions models, so it suits routing, classification, and policy checks that need a fast, scored answer instead of prose.

d1 is Liquid AI's structured decision model, served as a System One endpoint. Send a state along with typed questions, and it returns a choice, a score, or a yes/no answer, each with a probability taken directly from the model rather than written out as text. It uses the same /v1/systemone schema as other OpenRouter Decisions models, so it suits routing, classification, and policy checks that need a fast, scored answer instead of prose.

Input / output price: $0.02 / $0.00 per 1M
Context: 66K tokens
Released: Oct 1, 2026

Try Respan for free

Agent setup

Paste into Claude Code, Cursor, or Codex

Help me set up the Respan gateway: fetch and follow https://www.respan.ai/docs/agent-setup.md. Use model "d1".

from openai import OpenAI

client = OpenAI(

    base_url="https://api.respan.ai/api/",

    api_key="YOUR_RESPAN_API_KEY",

)

response = client.chat.completions.create(

    model="d1",

    messages=[{"role": "user", "content": "Hello!"}],

)

print(response.choices[0].message.content)

import OpenAI from "openai";

const client = new OpenAI({

  baseURL: "https://api.respan.ai/api/",

  apiKey: "YOUR_RESPAN_API_KEY",

});

const response = await client.chat.completions.create({

  model: "d1",

  messages: [{ role: "user", content: "Hello!" }],

});

console.log(response.choices[0].message.content);

curl https://api.respan.ai/api/chat/completions \

  -H "Authorization: Bearer YOUR_RESPAN_API_KEY" \

  -H "Content-Type: application/json" \

  -d '{

    "model": "d1",

    "messages": [{"role": "user", "content": "Hello!"}]

}'

Read docs

Providers

One provider serves this model, priced per 1M tokens after gateway discounts.

Provider	Context	Input	Output	Cache read	Capabilities
OpenRouter`openrouter/liquid/d1`	66K	$0.02/M	$0.00/M	$0.00/M

Is a provider down? OpenRouter status

Pricing

USD per 1M tokens on OpenRouter, after gateway discounts.

Input: $0.02 per 1M
Output: $0.00 per 1M

Cost by volume

Total cost from 0 to 1T tokens.

$0.02/MOpenRouter

Apps

Use D1 in the tools you already run. Each guide points the app at the Respan gateway.

Setup guides for more apps are in the integration docs.

D1 FAQ

Short answers, built from the data on this page.

Certified where it counts.

Built to meet the security and privacy standards that enterprise and healthcare teams require.

ISO 27001

The internationally recognized standard for information security management.

SOC 2

Secure, compliant management of your data across all of our systems.

GDPR

Operated under GDPR, the world's strictest standard for data privacy.

HIPAA

HIPAA compliant, with a BAA available for healthcare teams.

Works with your entire stack

Use Respan with your favorite frameworks and tools.

Built for AI agents.
Break less.
Ship more.

Start for free Get a demo

D1