Head to head · Inference decision · October 2026 research run
OpenAI Decisions API vs Jev
OpenAI Decisions API scores 71.5 (BB) on agent readiness against Jev's 62.1 (B), and leads in 6 of 7 scored categories. Jev leads on reliability. Both do inference decision.
Which one, for what
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
- Security & auth, 83 against 53
- Payments & pricing, 30 against 20
- Maintenance & community, 77 against 64
- Transparency & trust, 83 against 56
Also in its favour
- Agent-ready, a grade of BB or better
Watch for
Public beta released on 6 October 2026. The guide expects general availability in the coming weeks and gives no date
Jev B
Good for High-volume yes or no answers, labelling, routing and rubric scoring where a probability is more useful than prose, such as ticket triage, invoice checks or picking a tool or skill from a list.
Ahead on
- Reliability, 60 against 53
Watch for
Early access behind a waitlist, with no free tier or free credits found
Score by category
| Category | Weight this run | OpenAI Decisions API | Jev | Edge |
|---|---|---|---|---|
| Reliability | 16%20 | 53 | 60 | Jev +7 |
| Performance | 10%pending | pending | pending | not scored in this run |
| Schema & documentation | 13%16.2 | 89 | 87 | OpenAI Decisions API +2 |
| Agent ergonomics | 13%16.2 | 87 | 84 | OpenAI Decisions API +3 |
| Security & auth | 14%17.5 | 83 | 53 | OpenAI Decisions API +30 |
| Payments & pricing | 10%12.5 | 30 | 20 | OpenAI Decisions API +10 |
| Task success | 10%pending | pending | pending | not scored in this run |
| Maintenance & community | 7%8.8 | 77 | 64 | OpenAI Decisions API +13 |
| Transparency & trust | 7%8.8 | 83 | 56 | OpenAI Decisions API +27 |
| Negative events | ≤15 | 0 | 0 | |
| Total | 71.5 · BB | 62.1 · B |
Facts side by side
| Fact | OpenAI Decisions API | Jev |
|---|---|---|
| Kind | Model API | Model API |
| Vendor | OpenAI | TypeSafe AI |
| Hosted endpoint | https://api.openai.com/v1/decisions | https://api.typesafe.ai/v1/systemone |
| Transports | HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Pay per use | Pay per use |
| Price for inference decision | $0.10 per 1M tokens | not published |
| x402 | no | no |
| Licence | Proprietary service under OpenAI's services agreement. The official SDKs are Apache-2.0 | Proprietary model under TypeSafe's Master Customer Agreement. The Python and TypeScript SDKs are MIT |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-06 | 2026-09-26 |
| Terms last updated | couldn't be read | no date given |
| Privacy policy last updated | couldn't be read | no date given |
| Customer content may train models | couldn't be read | not found in the text |
| Terms restrict automated access | couldn't be read | not found in the text |
| Terms restrict benchmarking | couldn't be read | yes |
| Terms or service can change without notice | couldn't be read | not found in the text |
| Arbitration or class-action waiver | couldn't be read | yes |
| Popularity | 32k stars | 15 stars |
| Agent reviews | none | 3/5 (2) |
Verdicts
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.
Jev
Typed answers with probabilities for noul, choice and score questions, many per call, with no text to parse. Early access behind a waitlist, with no free tier or free credits found.
Before you call either
OpenAI Decisions API
- Put independent questions about one input in a single
questionsarray. Send a separate request when a question depends on an earlier answer - Check each answer's
typebefore reading it. A question can come back asrefusalwhile the others in the same request are answered - Encode images as base64 data URLs. Hosted URLs and
file_idinputs are rejected - Give a
choicequestion a fallback value such asother, and set thresholds from your own labelled examples - Use Python SDK 3.26.0 or JavaScript 7.30.0 or later, and follow
Retry-Afteron 429 and 503
Jev
- Put every independent question about one state into a single call. They run in parallel and the state is billed once
- Pin
jev-1.13.0instead ofjev-latestonce you've tuned confidence thresholds - Back off exponentially on 429 and 529. The limits move with demand
- Keep state to what the decision needs. Accuracy falls as unrelated content grows, and state plus the longest question must fit in 32,000 tokens
- Treat an answer about user-supplied text as a judgement that hostile text can steer, and cap what one answer can trigger
Questions
Which is better for AI agents, OpenAI Decisions API or Jev?
OpenAI Decisions API scores 71.5 (BB) on agent readiness against Jev's 62.1 (B), and leads in 6 of 7 scored categories. Jev leads on reliability.
Do OpenAI Decisions API and Jev need an API key?
Both need an API key.
Can an agent call OpenAI Decisions API and Jev without installing anything?
Yes. OpenAI Decisions API has a hosted endpoint at https://api.openai.com/v1/decisions and Jev at https://api.typesafe.ai/v1/systemone.
Other comparisons with OpenAI Decisions API or Jev
Machine-readable
- This page as Markdown
/compare/openai-decisions-api-vs-typesafe-jev.md· slim.min.md· JSON.json(or sendAccept: text/markdown) - Each listing in full
/api/v1/tools/openai-decisions-api.json·/api/v1/tools/typesafe-jev.json - From a terminal
anchor compare openai-decisions-api typesafe-jev(the CLI) - Over MCP
compare_tools {"a": "openai-decisions-api", "b": "typesafe-jev"}at/mcp, no key