# 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. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/openai-decisions-api-vs-typesafe-jev
- Markdown: https://www.anchorterminal.com/compare/openai-decisions-api-vs-typesafe-jev.md (~2,100 tokens)
- Slim: https://www.anchorterminal.com/compare/openai-decisions-api-vs-typesafe-jev.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/openai-decisions-api-vs-typesafe-jev.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-08

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.

- OpenAI Decisions API: grade BB, 71.5/100, rank #102 of 629. Markdown https://www.anchorterminal.com/tools/openai-decisions-api.md · JSON https://www.anchorterminal.com/api/v1/tools/openai-decisions-api.json
- Jev: grade B, 62.1/100, rank #309 of 629. Markdown https://www.anchorterminal.com/tools/typesafe-jev.md · JSON https://www.anchorterminal.com/api/v1/tools/typesafe-jev.json

## Which one, for what

### 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:
- 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 | OpenAI Decisions API | Jev | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 53 | 60 | Jev +7 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 89 | 87 | OpenAI Decisions API +2 |
| Agent ergonomics | 13% (16.2 this run) | 87 | 84 | OpenAI Decisions API +3 |
| Security & auth | 14% (17.5 this run) | 83 | 53 | OpenAI Decisions API +30 |
| Payments & pricing | 10% (12.5 this run) | 30 | 20 | OpenAI Decisions API +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 77 | 64 | OpenAI Decisions API +13 |
| Transparency & trust | 7% (8.8 this run) | 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

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

### Jev

1. Put every independent question about one state into a single call. They run in parallel and the state is billed once
2. Pin `jev-1.13.0` instead of `jev-latest` once you've tuned confidence thresholds
3. Back off exponentially on 429 and 529. The limits move with demand
4. 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
5. 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.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/openai-decisions-api-vs-typesafe-jev.json, and with the fewest tokens: https://www.anchorterminal.com/compare/openai-decisions-api-vs-typesafe-jev.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "openai-decisions-api", "b": "typesafe-jev"}`. From a terminal: `anchor compare openai-decisions-api typesafe-jev`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/openai-decisions-api.json and https://www.anchorterminal.com/api/v1/tools/typesafe-jev.json

## Other comparisons with OpenAI Decisions API or Jev

- [Clef vs OpenAI Decisions API](https://www.anchorterminal.com/compare/cloudflare-clef-vs-openai-decisions-api.md)
- [Clef vs Jev](https://www.anchorterminal.com/compare/cloudflare-clef-vs-typesafe-jev.md)
- [Laya vs OpenAI Decisions API](https://www.anchorterminal.com/compare/convai-laya-vs-openai-decisions-api.md)
- [Laya vs Jev](https://www.anchorterminal.com/compare/convai-laya-vs-typesafe-jev.md)
- [Kev vs OpenAI Decisions API](https://www.anchorterminal.com/compare/jaredpalmer-kev-vs-openai-decisions-api.md)
- [Kev vs Jev](https://www.anchorterminal.com/compare/jaredpalmer-kev-vs-typesafe-jev.md)
- [Liquid d1 vs OpenAI Decisions API](https://www.anchorterminal.com/compare/liquid-d1-vs-openai-decisions-api.md)
- [Liquid d1 vs Jev](https://www.anchorterminal.com/compare/liquid-d1-vs-typesafe-jev.md)
- [OpenAI Decisions API vs Strands Decider 2B](https://www.anchorterminal.com/compare/openai-decisions-api-vs-strands-decider.md)
- [OpenAI Decisions API vs Vela 2.0](https://www.anchorterminal.com/compare/openai-decisions-api-vs-vela.md)
- [Strands Decider 2B vs Jev](https://www.anchorterminal.com/compare/strands-decider-vs-typesafe-jev.md)
- [Jev vs Vela 2.0](https://www.anchorterminal.com/compare/typesafe-jev-vs-vela.md)