Aplomb 1 API

About Aplomb 1

Answers yes or no, choice, score, and tool questions about text, JSON, images, and video with calibrated probabilities in one request.

Send a state and typed questions to POST /v1/decisions. Answers are probabilities with a confidence value; no text is generated. Billed on input tokens only.

Also known as EmpirioLabs Aplomb 1

Aplomb 1 specs

Model ID

aplomb-1

Author

EmpirioLabs

Category

Decision Models

Released

Sep 27, 2026

Context window

60K tokens

Input

TextImageVideo

Output

Decision

Endpoints

POST/v1/decisions

Alternate model IDs

empiriolabs/aplomb-1decide-1empiriolabs/decide-1

Aplomb 1 API pricing

Live pay-as-you-go rates from the EmpirioLabs catalog. You are billed only for what you use, with no monthly minimum.

How to call the Aplomb 1 API

Aplomb 1 answers questions about your content through POST /v1/decisions. Send the content in state and your questions in questions with the model id aplomb-1. Each answer returns probabilities and a confidence value instead of generated text. Get an API key from the EmpirioLabs dashboard.

curl https://api.empiriolabs.ai/v1/decisions \
  -H "Authorization: Bearer $EMPIRIOLABS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "aplomb-1",
    "state": "I was charged twice for my subscription this month. Please refund the duplicate charge today.",
    "questions": {
      "is_urgent": {"type": "noul", "instructions": "Does the customer need a resolution today?"},
      "department": {
        "type": "choice",
        "instructions": "Which team should handle this message?",
        "criteria": {"billing": null, "technical": null, "sales": null}
      }
    }
  }'

import requests

response = requests.post(
    "https://api.empiriolabs.ai/v1/decisions",
    headers={"Authorization": "Bearer YOUR_EMPIRIOLABS_API_KEY"},
    json={
        "model": "aplomb-1",
        "state": "I was charged twice for my subscription this month. Please refund the duplicate charge today.",
        "questions": {
            "is_urgent": {"type": "noul", "instructions": "Does the customer need a resolution today?"},
            "department": {
                "type": "choice",
                "instructions": "Which team should handle this message?",
                "criteria": {"billing": None, "technical": None, "sales": None},
            },
        },
    },
)
answers = response.json()["answers"]
print(answers["is_urgent"]["noul"], answers["department"]["choice"])

Good to know

Requests

Send content in state (a string, a JSON object, or an array) and 1 to 128 questions in questions to POST /v1/decisions. Each question is answered on its own, with probabilities and a confidence value. No text is generated.

Question types

• noul: yes or no, answered with the probability of yes.
• choice: one of 2 to 255 options, answered with the chosen option and the full distribution.
• score: 2 to 10 ordered levels, answered with the expected level and the distribution.
• tool: which of 1 to 254 function tools to call, with distributions over its enum and boolean arguments.

Limits

• The state plus the longest question: up to 60,000 tokens.
• At most 512 evaluated questions per request. A tool question counts as one plus one per enum or boolean argument.
• Media: up to 16 images (20 MB each) and 4 videos (100 MB and 10 minutes each), as public HTTPS URLs or inline base64. Audio is not accepted; use Aplomb 1 Omni.

Billing

Input tokens only: the state once per request, each question's own text, and each media item's tokens. Output is always zero.

Aplomb 1 API: common questions

How much does the Aplomb 1 API cost?

On EmpirioLabs, Aplomb 1 is billed pay as you go. The live rate card on this page always matches what the API charges.

What is the context window of Aplomb 1?

Aplomb 1 supports a 60K-token context window.

Which endpoint does Aplomb 1 use?

Aplomb 1 is served through POST /v1/decisions on api.empiriolabs.ai with standard bearer-token authentication.

Can I try Aplomb 1 in the browser before integrating?

Yes. The EmpirioLabs playground runs Aplomb 1 in the browser with the same parameters the API exposes, so you can test prompts before writing code.

How do I get a Aplomb 1 API key?

Create an EmpirioLabs account, then generate a key under API Keys in the dashboard. Billing is pay-as-you-go credits, so you only pay for the requests you make.