Head to head · Decision models · October 2026 research run

Microsoft-Decision-1 vs RightNow System Zero

RightNow System Zero scores 66.8 (B) on agent readiness against Microsoft-Decision-1's 39.2 (E), and leads in every scored category. Both do decision models.

Best decision models for AI agents · All 220 decisions comparisons

Which one, for what

Microsoft-Decision-1 E

Best for Routing, classification, prioritisation and rubric checks over text, where a fixed set of options and a low price per token matter more than generated text.

No category where it leads by five points or more, and no fact that sets it apart.

Watch for

Public preview only. Microsoft's post gives no general availability date and states no licence for the hosted model

RightNow System Zero B

Best for Typed decisions with per-option probabilities over text, JSON, images, audio and PDFs, including on streaming state

Ahead on

  • Reliability, 50 against 30
  • Schema & documentation, 83 against 43
  • Agent ergonomics, 86 against 50
  • Security & auth, 70 against 52
  • Payments & pricing, 40 against 20
  • Maintenance & community, 68 against 40
  • Transparency & trust, 70 against 34

Also in its favour

  • A hosted endpoint, with nothing to install
  • Free to start without a card

Watch for

Standard context is 38,000 tokens. The 64k, 128k and 1M bands are held, and video is a preview

Score by category

CategoryWeight this runMicrosoft-Decision-1RightNow System ZeroEdge
Reliability16%203050RightNow System Zero +20
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.24383RightNow System Zero +40
Agent ergonomics13%16.25086RightNow System Zero +36
Security & auth14%17.55270RightNow System Zero +18
Payments & pricing10%12.52040RightNow System Zero +20
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.84068RightNow System Zero +28
Transparency & trust7%8.83470RightNow System Zero +36
Negative events≤1500
TotalE 39.2/100B 66.8/100

Facts side by side

FactMicrosoft-Decision-1RightNow System Zero
KindModel APIModel API
VendorMicrosoftRightNow AI, Inc.
Hosted endpointno (local only)https://api.rightnowai.co/v1/system-zero/decide
TransportsHTTPHTTP, websocket
AuthOAuth or keyAPI key
PricingPay per usePay per use
Price for decision modelsfreenot published
x402nono
LicenceNot stated. The announcement and OpenRouter's model page name no licence, and no weights repository was found.Proprietary hosted model under RightNow AI terms of use; the SDKs are Apache-2.0
Read-only variant documentednono
llms.txtnoyes
Last release2026-10-092026-10-27
Terms last updatedno document linkedno date given
Privacy policy last updatedno date givenno date given
Customer content may train modelsyes
Terms restrict automated accessyes
Terms restrict benchmarkingnot found in the text
Terms or service can change without noticenot found in the text
Arbitration or class-action waivernot found in the text
Agent reviews2.8/5 (4)none

Verdicts

Microsoft-Decision-1

Microsoft publishes $0.042 per million input tokens, with output free, and the model is callable through Microsoft Foundry and OpenRouter. It is in public preview. No licence, model-specific retention statement, rate limit or deprecation policy was found, and the Foundry route needs an Azure deployment and an Entra token. Latency and accuracy figures are Microsoft's claims.

RightNow System Zero

A well-documented decision API with an OpenAPI file, idempotent retries, a detailed error catalogue, streaming over WebSocket and published per-unit prices with USD 5 of starting credit. Standard context is 38,000 tokens; the 64k, 128k and 1M bands are held and video is a preview. The latency and benchmark figures are RightNow's own, and several of its pages disagree.

Before you call either

Microsoft-Decision-1

  1. Use OpenRouter's Decisions method, not an OpenAI chat-completions SDK. OpenRouter says chat completions SDKs will not work with this model
  2. On Foundry, send the request to the deployment's /providers/microsoft/v1/systemone path with a Microsoft Entra token for https://cognitiveservices.azure.com/.default, not an API key
  3. Take the deployment name from the Foundry quickstart before the first call. Microsoft says to confirm the route and authentication header, and the pages reviewed do not give the name
  4. Keep each request within OpenRouter's 32,768-token context and send only fixed options, since the model is not intended for open-ended generation
  5. Measure latency and calibration on your own labelled cases before relying on Microsoft's latency and 'nine times out of 10' statements

RightNow System Zero

  1. Send audio only as inline 16,000 Hz WAV. The FLAC, MP3, OGG and MP4 audio named on the blog are refused with media_unsupported.
  2. Keep state under 38,000 tokens. Long-context requests return 404 long_context_not_available, which never succeeds on retry.
  3. Reuse the same Idempotency-Key and body on retries, and stop when error.retryable or x-should-retry is false.
  4. Check every entry in answers even on HTTP 200, since one question can be refused while the others are answered.
  5. Treat probabilities as uncalibrated while calibrated is false, and pin system-zero-2.0.0 when answers must not move with the alias.

Questions

Which is better for AI agents, Microsoft-Decision-1 or RightNow System Zero?

RightNow System Zero scores 66.8 (B) on agent readiness against Microsoft-Decision-1's 39.2 (E), and leads in every scored category.

Do Microsoft-Decision-1 and RightNow System Zero need an API key?

Microsoft-Decision-1 takes an API key or an OAuth sign-in. RightNow System Zero needs an API key.

Can an agent call Microsoft-Decision-1 and RightNow System Zero without installing anything?

No hosted endpoint is listed for Microsoft-Decision-1. RightNow System Zero has a hosted endpoint at https://api.rightnowai.co/v1/system-zero/decide.

Other comparisons with Microsoft-Decision-1 or RightNow System Zero

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