Decision Models s1-pro-5 (EU)

About Decision Models s1-pro-5 (EU)

Decision Models s1-pro-5 (EU) is a decision model published by decisionmodelsio-eu, with a 8,192-token context window. Through TrustedRouter it runs on 1 provider, with options in the EU, from $0.089 per million input tokens.

Model ID

decisionmodelsio-eu/s1-pro-5

Publisher

decisionmodelsio-eu

Modes

decide

Billing

Credits

Set it up with your agent

Paste this into Claude Code, Cursor or any coding agent.

Use Decision Models s1-pro-5 (EU) through TrustedRouter in this project.

1. Read https://trustedrouter.com/llms.txt
2. Point the OpenAI-compatible client at
   https://api.trustedrouter.com/v1 and read the key from
   TRUSTEDROUTER_API_KEY.
3. Set the model to decisionmodelsio-eu/s1-pro-5.
4. Run the tests, then show me the diff before committing.

import os
import requests

response = requests.post(
    "https://api.trustedrouter.com/api/alpha/decide",
    headers={"Authorization": f"Bearer {os.environ['TRUSTEDROUTER_API_KEY']}"},
    json={
        "model": "decisionmodelsio-eu/s1-pro-5",
        "state": "Customer: I was charged twice for order A-1.",
        "questions": {
            "refund": {"type": "boolean", "instructions": "Is a refund requested?"}
        },
    },
)
print(response.json())

curl https://api.trustedrouter.com/api/alpha/decide \
  -H "Authorization: Bearer sk-tr-v1-..." \
  -H "Content-Type: application/json" \
  -d '{
    "model": "decisionmodelsio-eu/s1-pro-5",
    "state": "Customer: I was charged twice for order A-1.",
    "questions": {
      "refund": {"type": "boolean", "instructions": "Is a refund requested?"}
    }
  }'

Providers

Open the row for retention, location and weight format, or see how we check privacy claims and the live speed leaderboard.

Decision Models s1-pro-5 (EU) providers and prices per 1M tokens

Provider	Input	Cached	Output	Cost per 1M in + out	Details
Decision Models (EU) $0.0886 in · $0 out	$0.0886	—	$0	$0.089	Decision Models (EU) details
Retention Verification: privacy unknown. Typed decision models, not chat completions. Decision Models states that prompts and outputs are processed in memory, never stored or used for training. Operational billing metadata is retained. No confidential-compute or E2EE claim is made. This route enforces the EU tier; inference stays within the EU (currently Finland). Provider policy source Location Operator country: DE Headquarters / registered office: Not verified. Inference: EU-only inference, currently Finland. EU-only tier, currently Finland. Region pinning through TR: Use decisionmodelsio-eu/s1-fast, s1-pro or s1-vision. The gateway pins S1-Region=eu and a separate regional key; no cross-tier fallback. Reviewed 2026-10-09. Regional processing and pricing Processing locations API contract Full location evidence Weight format Unknown Price and speed Input $0.08862/1M · Cached input Not published · Output selected route TTFT: insufficient data Speed: insufficient data Decision Models (EU) provider page

How to use Decision Models s1-pro-5 (EU)

Pinned Pro version: mammoth-1 (baselabs/mammoth-1 revision 61cec44c281c693992e3d6ebeb44dd3402dfa186), a 27B open typed-decision model served in FP8; noul/choice/score answers with probabilities. Text only; up to 3 questions per request, each answered separately, with at most 8,192 input tokens per question including the state. Billed at the s1-pro price. The pinned id always answers with the same model weights.

Input

POST /v1/decide: state (at most 16 KiB serialized JSON) and exactly one boolean/noul, choice or score question. The model's input-token limit also applies. No streaming.

Output

Verified answers and probabilities, with inputTokens usage. Input-only billing; output tokens are free. The EU route cannot fall back to Global.

Example input

{"model": "decisionmodelsio-eu/s1-pro-5", "state": "Mia owns a red bicycle.", "questions": {"color": {"type": "choice", "instructions": "Which color is the bicycle?", "criteria": {"red": null, "blue": null}}}}

Example output

{"model": "decisionmodelsio-eu/s1-pro-5", "answers": {"color": {"type": "choice", "choice": "red", "probabilities": {"red": 0.99, "blue": 0.01}}}}