Head to head · Decision models · October 2026 research run

RightNow System Zero vs SPEV

RightNow System Zero scores 66.8 (B) on agent readiness against SPEV's 51.5 (D), and leads in every scored category. Both do decision models.

Best decision models for AI agents · All 220 decisions comparisons

Which one, for what

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 45
  • Agent ergonomics, 86 against 76
  • Security & auth, 70 against 33
  • Payments & pricing, 40 against 30
  • Maintenance & community, 68 against 49
  • Transparency & trust, 70 against 59

Also in its favour

  • 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

SPEV D

Best for Typed decisions over raw audio, such as end-of-turn detection, call triage and flagging, plus text and single images, hosted or self-hosted.

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

Watch for

Published on 14 October 2026, with no service record, no status page and no API changelog

Score by category

CategoryWeight this runRightNow System ZeroSPEVEdge
Reliability16%205045RightNow System Zero +5
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28381RightNow System Zero +2
Agent ergonomics13%16.28676RightNow System Zero +10
Security & auth14%17.57033RightNow System Zero +37
Payments & pricing10%12.54030RightNow System Zero +10
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.86849RightNow System Zero +19
Transparency & trust7%8.87059RightNow System Zero +11
Negative events≤150-2
TotalB 66.8/100D 51.5/100

Facts side by side

FactRightNow System ZeroSPEV
KindModel APIModel API
VendorRightNow AI, Inc.Sprag
Hosted endpointhttps://api.rightnowai.co/v1/system-zero/decidehttps://api.sprag.ai/v1/decisions
TransportsHTTP, websocketHTTP
AuthAPI keyAPI key
PricingPay per usePay per use
x402nono
LicenceProprietary hosted model under RightNow AI terms of use; the SDKs are Apache-2.0Apache-2.0 (weights and inference code, following the Qwen3-Omni base). Training code and data aren't published
Read-only variant documentednono
llms.txtyesyes
Last release2026-10-272026-10-14
Terms last updatedno date given2026-09-01
Privacy policy last updatedno date given2026-08-01
Customer content may train modelsyesyes, with an opt-out
Terms restrict automated accessyesnot found in the text
Terms restrict benchmarkingnot found in the textnot found in the text
Terms or service can change without noticenot found in the textnot found in the text
Arbitration or class-action waivernot found in the textnot found in the text

Verdicts

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.

SPEV

SPEV answers typed questions over text, audio or an image in one call, with a public OpenAPI schema and Apache-2.0 weights on Hugging Face. It is a day old, has an 8,192-token context, no status page or changelog, and Sprag's terms let it train on API content unless the customer opts out by email.

Before you call either

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.

SPEV

  1. Send model: "spev" to POST https://api.sprag.ai/v1/decisions with a bearer key. /v1/systemone returns 410
  2. Ask every question about one piece of evidence in one request. Answers come back in question order
  3. Send audio as base64 in input_audio with format, not as a data URL, and at most one image across all messages
  4. Keep evidence and questions under 8,192 tokens. Over the limit returns 400 model_limit_exceeded
  5. Back off on 429 and 503 for Retry-After seconds. Limits are 60 requests a minute per organisation by default
  6. Handle an answer of type refusal, which carries no probabilities

Questions

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

RightNow System Zero scores 66.8 (B) on agent readiness against SPEV's 51.5 (D), and leads in every scored category.

Do RightNow System Zero and SPEV need an API key?

Both need an API key.

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

Yes. RightNow System Zero has a hosted endpoint at https://api.rightnowai.co/v1/system-zero/decide and SPEV at https://api.sprag.ai/v1/decisions.

Other comparisons with RightNow System Zero or SPEV

Machine-readable

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