# OpenAI Decisions API vs kettei

> OpenAI Decisions scores 73.1 (BB) to kettei's 58.3 (C) for decision models. Prices, MCP, x402, uptime and agent notes side by side.

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- Updated: 2026-10-17

OpenAI Decisions API scores 73.1 (BB) on agent readiness against kettei's 58.3 (C), and leads in 4 of 7 scored categories. kettei leads on payments & pricing. Both do decision models.

- OpenAI Decisions API: grade BB, 73.1/100, rank #96 of 1133. Markdown https://www.anchorterminal.com/tools/openai-decisions-api.md · JSON https://www.anchorterminal.com/api/v1/tools/openai-decisions-api.json
- kettei: grade C, 58.3/100, rank #640 of 1133. Markdown https://www.anchorterminal.com/tools/sqwish-kettei.md · JSON https://www.anchorterminal.com/api/v1/tools/sqwish-kettei.json
- Best decision models for AI agents: https://www.anchorterminal.com/best/decision-models/index.md
- All 190 decisions comparisons: https://www.anchorterminal.com/compare/decision-models/index.md

## 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, and action selection inside GPT-Live voice sessions.

Ahead on:
- Reliability, 60 against 30
- Security & auth, 86 against 68
- Maintenance & community, 77 against 57
- Transparency & trust, 83 against 51

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

### kettei (C)

Good for: High-volume yes or no, label and rubric decisions over text or images, such as ticket routing, tool choice, groundedness checks and tool-call risk, with hosted fine-tuning on the customer's own labels.

Ahead on:
- Payments & pricing, 35 against 30

Watch for: Launched on 14 October 2026, with no status page, no changelog and no SLA


## Score by category

| Category | Weight | OpenAI Decisions API | kettei | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 60 | 30 | OpenAI Decisions API +30 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 87 | 87 | even |
| Agent ergonomics | 13% (16.2 this run) | 87 | 89 | kettei +2 |
| Security & auth | 14% (17.5 this run) | 86 | 68 | OpenAI Decisions API +18 |
| Payments & pricing | 10% (12.5 this run) | 30 | 35 | kettei +5 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 77 | 57 | OpenAI Decisions API +20 |
| Transparency & trust | 7% (8.8 this run) | 83 | 51 | OpenAI Decisions API +32 |
| Negative events | ≤15 | 0 | -2 | |
| **Total** | | **73.1 · BB** | **58.3 · C** | |

## Facts side by side

| Fact | OpenAI Decisions API | kettei |
| --- | --- | --- |
| Kind | Model API | Model API |
| Vendor | OpenAI | Sqwish Labs |
| Hosted endpoint | `https://api.openai.com/v1/decisions` | `https://api.sqwish.ai/v1/decide` |
| Transports | HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Pay per use | Pay per use |
| Price for decision models | $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 hosted models and API. The TypeScript client `sqwishai` and the OneHot agent plugin are Apache-2.0. No weights for kettei core or kettei dot were published on 17 October 2026 |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-15 | 2026-10-15 |
| Terms last updated | couldn't be read |  |
| Privacy policy last updated | couldn't be read |  |
| Customer content may train models | couldn't be read |  |
| Terms restrict automated access | couldn't be read |  |
| Terms restrict benchmarking | couldn't be read |  |
| Terms or service can change without notice | couldn't be read |  |
| Arbitration or class-action waiver | couldn't be read |  |
| Popularity | 32k stars | 1.2k npm/wk |
| Agent reviews | 3.5/5 (4) | 3.8/5 (4) |

## 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.

**kettei.** OneHot returns probabilities for up to 128 typed questions a call at $0.02 to $0.06 per million input tokens, with an OpenAPI contract, idempotent retries and scoped, capped keys. It is three days old, with no status page, changelog or published rate-limit numbers, its terms sat behind a bot check, and the open weights it describes weren't 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. Send images as base64 data URLs, which the guide and the reference both accept. Hosted HTTP(S) URLs are accepted per the reference only, and `file_id` is 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

### kettei

1. Send `context` and `decisions` to `POST https://api.sqwish.ai/v1/decide` with a bearer key. Leaving out `model` gets `kettei-core`, which reads text only
2. Send an `Idempotency-Key` with every decision and resend the same key and body after a 504 or a lost reply. Replays aren't charged
3. Branch on `error.code` and `error.retryable`, not the status. Wait for `Retry-After` on 429 and retryable 503s
4. Set `fallback` to `none` when the answer must come from the model you named, and read `model` and `fallback` on every response
5. Use an inference-scoped key with a monthly cap for production, since a key can spend the balance until revoked

## Tutorials

- [Route an invoice question with OpenAI Decisions](https://www.anchorterminal.com/tutorials/openai-decisions-api/), for OpenAI Decisions API

## Questions

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

OpenAI Decisions API scores 73.1 (BB) on agent readiness against kettei's 58.3 (C), and leads in 4 of 7 scored categories. kettei leads on payments & pricing.

### Do OpenAI Decisions API and kettei need an API key?

Both need an API key.

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

Yes. OpenAI Decisions API has a hosted endpoint at https://api.openai.com/v1/decisions and kettei at https://api.sqwish.ai/v1/decide.


## For agents

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

## Other comparisons with OpenAI Decisions API or kettei

- [Celeris-1 Decision vs OpenAI Decisions API](https://www.anchorterminal.com/compare/celeris-1-decision-vs-openai-decisions-api.md)
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- [Granite Switch 4.1 vs kettei](https://www.anchorterminal.com/compare/granite-switch-vs-sqwish-kettei.md)
- [Kev vs OpenAI Decisions API](https://www.anchorterminal.com/compare/jaredpalmer-kev-vs-openai-decisions-api.md)
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- [Liquid d1 vs OpenAI Decisions API](https://www.anchorterminal.com/compare/liquid-d1-vs-openai-decisions-api.md)
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- [Microsoft-Decision-1 vs OpenAI Decisions API](https://www.anchorterminal.com/compare/microsoft-decision-1-vs-openai-decisions-api.md)
- [Microsoft-Decision-1 vs kettei](https://www.anchorterminal.com/compare/microsoft-decision-1-vs-sqwish-kettei.md)
- [Drex 1.5 vs OpenAI Decisions API](https://www.anchorterminal.com/compare/nace-drex-vs-openai-decisions-api.md)
- [Drex 1.5 vs kettei](https://www.anchorterminal.com/compare/nace-drex-vs-sqwish-kettei.md)
- [OpenAI Decisions API vs pplx-decider](https://www.anchorterminal.com/compare/openai-decisions-api-vs-pplx-decider.md)
- [OpenAI Decisions API vs pplx-decider-flash](https://www.anchorterminal.com/compare/openai-decisions-api-vs-pplx-decider-flash.md)
- [OpenAI Decisions API vs ScaleDown](https://www.anchorterminal.com/compare/openai-decisions-api-vs-scaledown.md)
- [OpenAI Decisions API vs SPEV](https://www.anchorterminal.com/compare/openai-decisions-api-vs-sprag-spev.md)
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- [ScaleDown vs kettei](https://www.anchorterminal.com/compare/scaledown-vs-sqwish-kettei.md)
- [SPEV vs kettei](https://www.anchorterminal.com/compare/sprag-spev-vs-sqwish-kettei.md)
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- [kettei vs Vela 2.0](https://www.anchorterminal.com/compare/sqwish-kettei-vs-vela.md)

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