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Head to head · Inference decision · October 2026 research run

Decider vs OpenAI Decisions API

OpenAI Decisions API scores 71.5 (BB) on agent readiness against Decider's 69.5 (B), and leads in 4 of 7 scored categories. Decider leads on reliability, payments & pricing and maintenance & community. Both do inference decision.

DeciderMark Marosi (Mapika) · Model API B69.5/100#172 of 841 OpenAI Decisions APIOpenAI · Model API BB71.5/100#119 of 841

Which one, for what

Decider B

Good 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 53
  • Payments & pricing, 60 against 30
  • Maintenance & community, 87 against 77

Also in its favour

  • 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

OpenAI Decisions API BB

Good for High-volume yes or no checks, routing among fixed options and rubric scoring over text and images, for teams already on an OpenAI key.

Ahead on

  • Schema & documentation, 89 against 78
  • Agent ergonomics, 87 against 80
  • Security & auth, 83 against 38
  • Transparency & trust, 83 against 46

Also in its favour

  • Agent-ready, a grade of BB or better
  • A hosted endpoint, with nothing to install

Watch for

Public beta released on 6 October 2026. The guide expects general availability in the coming weeks and gives no date

Score by category

CategoryWeight this runDeciderOpenAI Decisions APIEdge
Reliability16%209053Decider +37
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.27889OpenAI Decisions API +11
Agent ergonomics13%16.28087OpenAI Decisions API +7
Security & auth14%17.53883OpenAI Decisions API +45
Payments & pricing10%12.56030Decider +30
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88777Decider +10
Transparency & trust7%8.84683OpenAI Decisions API +37
Negative events≤1500
Total69.5 · B71.5 · BB

Facts side by side

FactDeciderOpenAI Decisions API
KindModel APIModel API
VendorMark Marosi (Mapika)OpenAI
Hosted endpointno (local only)https://api.openai.com/v1/decisions
TransportsHTTPHTTP
AuthNoneAPI key
PricingFreePay per use
Price for inference decisionfree$0.10 per 1M tokens
x402nono
LicenceApache-2.0 (code and weights)Proprietary service under OpenAI's services agreement. The official SDKs are Apache-2.0
Read-only variant documentednono
llms.txtnoyes
Last release2026-10-072026-10-06
Terms last updatedno document linkedcouldn't be read
Privacy policy last updatedno document linkedcouldn't be read
Customer content may train modelscouldn't be read
Terms restrict automated accesscouldn't be read
Terms restrict benchmarkingcouldn't be read
Terms or service can change without noticecouldn't be read
Arbitration or class-action waivercouldn't be read
Popularity1.1k stars, 2.7k PyPI/wk32k stars

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.

OpenAI Decisions API

Typed predicate, choice and score answers with probabilities, up to 200 questions a call, at $0.10 per million input tokens with no output charge. It is a public beta released on 6 October 2026, with one model alias, no dated snapshot, no Batch route and no SLA found.

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

OpenAI Decisions API

  1. Put independent questions about one input in a single questions array. Send a separate request when a question depends on an earlier answer
  2. Check each answer's type before reading it. A question can come back as refusal while the others in the same request are answered
  3. Encode images as base64 data URLs. Hosted URLs and file_id inputs are rejected
  4. Give a choice question a fallback value such as other, and set thresholds from your own labelled examples
  5. Use Python SDK 3.26.0 or JavaScript 7.30.0 or later, and follow Retry-After on 429 and 503

Questions

Which is better for AI agents, Decider or OpenAI Decisions API?

OpenAI Decisions API scores 71.5 (BB) on agent readiness against Decider's 69.5 (B), and leads in 4 of 7 scored categories. Decider leads on reliability, payments & pricing and maintenance & community.

Which is cheaper for inference decision, Decider or OpenAI Decisions API?

Decider, at free against $0.10 per 1M tokens for OpenAI Decisions API. These are the vendors' published prices for the job.

Do Decider and OpenAI Decisions API need an API key?

Decider needs no key. OpenAI Decisions API needs an API key.

Can an agent call Decider and OpenAI Decisions API without installing anything?

No hosted endpoint is listed for Decider. OpenAI Decisions API has a hosted endpoint at https://api.openai.com/v1/decisions.

Are Decider and OpenAI Decisions API open source?

Decider is open source (Apache-2.0 (code and weights)). No open-source release is listed for OpenAI Decisions API.

Other comparisons with Decider or OpenAI Decisions API

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