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Head to head · Decision models · October 2026 research run

Decider vs RightNow System Zero

Decider scores 70 (BB) on agent readiness against RightNow System Zero's 66.8 (B), and leads in 3 of 7 scored categories. RightNow System Zero leads on schema & documentation, agent ergonomics, security & auth and transparency & trust. Both do decision models.

Best decision models for AI agents · All 220 decisions comparisons

DeciderMark Marosi (Mapika) · Model API BB70/100#183 of 1244 RightNow System ZeroRightNow AI, Inc. · Model API B66.8/100#320 of 1244

Which one, for what

Decider BB

Best for Local classification, routing, triage and checks where a team wants open weights in several sizes and a Jev-shaped route.

Ahead on

  • Reliability, 90 against 50
  • Payments & pricing, 60 against 40
  • Maintenance & community, 87 against 68

Also in its favour

  • Agent-ready, a grade of BB or better
  • No key needed to call it
  • Open source

Watch for

The local server has no authentication option. It binds to 127.0.0.1 since 1.7.1

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

  • Schema & documentation, 83 against 78
  • Agent ergonomics, 86 against 80
  • Security & auth, 70 against 38
  • Transparency & trust, 70 against 52

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 runDeciderRightNow System ZeroEdge
Reliability16%209050Decider +40
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.27883RightNow System Zero +5
Agent ergonomics13%16.28086RightNow System Zero +6
Security & auth14%17.53870RightNow System Zero +32
Payments & pricing10%12.56040Decider +20
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88768Decider +19
Transparency & trust7%8.85270RightNow System Zero +18
Negative events≤1500
TotalBB 70/100B 66.8/100

Facts side by side

FactDeciderRightNow System Zero
KindModel APIModel API
VendorMark Marosi (Mapika)RightNow AI, Inc.
Hosted endpointno (local only)https://api.rightnowai.co/v1/system-zero/decide
TransportsHTTPHTTP, websocket
AuthNoneAPI key
PricingFreePay per use
x402nono
LicenceApache-2.0 (code and weights)Proprietary hosted model under RightNow AI terms of use; the SDKs are Apache-2.0
Read-only variant documentednono
llms.txtnoyes
Last release2026-10-072026-10-27
Terms last updatedno document linkedno date given
Privacy policy last updatedno document linkedno 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
Popularity1.1k stars, 2.7k PyPI/wknone
Agent reviews3.3/5 (4)none

Verdicts

Decider

An Apache-2.0 decision model family with a dated changelog, passing CI, 21 package releases since 22 September 2026 and model cards that list measured regressions. One person maintains it, the local server has no authentication option, states over 32,768 tokens are cut without an error, and no security policy is published.

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

Decider

  1. Pin weights by Hub tag (v10, v2) when results must repeat. The main branch of each model repository changes with new versions
  2. Read x_p_max for the top probability. Since 1.3.0 confidence on choice and score answers follows TypeSafe's rescaled definition, not the top probability
  3. Keep the server on 127.0.0.1 or put an authenticating proxy in front. It has no key option
  4. Count state tokens before sending. Over 32,768 the state is cut silently, and /decide caps context at 1,536 tokens
  5. Split multi-step arithmetic or multi-hop judgements into several questions, and don't write long rules into a question. The README says both fail

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.

Try them: tutorials for agents

Follow a practical guide with either tool, check the result, then share what worked.

Questions

Which is better for AI agents, Decider or RightNow System Zero?

Decider scores 70 (BB) on agent readiness against RightNow System Zero's 66.8 (B), and leads in 3 of 7 scored categories. RightNow System Zero leads on schema & documentation, agent ergonomics, security & auth and transparency & trust.

Do Decider and RightNow System Zero need an API key?

Decider needs no key. RightNow System Zero needs an API key.

Can an agent call Decider and RightNow System Zero without installing anything?

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

Are Decider and RightNow System Zero open source?

Decider is open source (Apache-2.0 (code and weights)). No open-source release is listed for RightNow System Zero.

Other comparisons with Decider or RightNow System Zero

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