# Celeris-1 Decision vs OpenAI Decisions API

> OpenAI Decisions API scores 71.5 (BB) on agent readiness against Celeris-1 Decision's 49.3 (D), and leads in every scored category. Both do inference decision. Celeris-1 Decision is cheaper for inference decision, $0 against $0.10 per 1M tokens. Category scores, facts, verdicts…

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- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-09

OpenAI Decisions API scores 71.5 (BB) on agent readiness against Celeris-1 Decision's 49.3 (D), and leads in every scored category. Both do inference decision. Celeris-1 Decision is cheaper for inference decision, $0 against $0.10 per 1M tokens.

- Celeris-1 Decision: grade D, 49.3/100, rank #708 of 842. Markdown https://www.anchorterminal.com/tools/celeris-1-decision.md · JSON https://www.anchorterminal.com/api/v1/tools/celeris-1-decision.json
- OpenAI Decisions API: grade BB, 71.5/100, rank #119 of 842. Markdown https://www.anchorterminal.com/tools/openai-decisions-api.md · JSON https://www.anchorterminal.com/api/v1/tools/openai-decisions-api.json

## Which one, for what

### Celeris-1 Decision (D)

Good for: Multimodal classification, routing and bounded decisions with probabilities and optional explanations

Also in its favour:
- Cheaper for inference decision, $0 against $0.10 per 1M tokens

Watch for: Early-access terms and capacity-dependent workspace activation

### 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:
- Reliability, 53 against 40
- Schema & documentation, 89 against 60
- Agent ergonomics, 87 against 80
- Security & auth, 83 against 45
- Payments & pricing, 30 against 20
- Maintenance & community, 77 against 40
- Transparency & trust, 83 against 53

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


## Score by category

| Category | Weight | Celeris-1 Decision | OpenAI Decisions API | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 40 | 53 | OpenAI Decisions API +13 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 60 | 89 | OpenAI Decisions API +29 |
| Agent ergonomics | 13% (16.2 this run) | 80 | 87 | OpenAI Decisions API +7 |
| Security & auth | 14% (17.5 this run) | 45 | 83 | OpenAI Decisions API +38 |
| Payments & pricing | 10% (12.5 this run) | 20 | 30 | OpenAI Decisions API +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 40 | 77 | OpenAI Decisions API +37 |
| Transparency & trust | 7% (8.8 this run) | 53 | 83 | OpenAI Decisions API +30 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **49.3 · D** | **71.5 · BB** | |

## Facts side by side

| Fact | Celeris-1 Decision | OpenAI Decisions API |
| --- | --- | --- |
| Kind | Model API | Model API |
| Vendor | Celeris (Marqo Inc) | OpenAI |
| Hosted endpoint | `https://inference.celeris.ai/celeris-1-decision/v1/systemone` | `https://api.openai.com/v1/decisions` |
| Transports | HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Pay per use | Pay per use |
| Price for inference decision | free | $0.10 per 1M tokens |
| x402 | no | no |
| Licence | Proprietary hosted model under Celeris terms of service | Proprietary service under OpenAI's services agreement. The official SDKs are Apache-2.0 |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-08 | 2026-10-06 |
| Terms last updated | 2026-09-08 | couldn't be read |
| Privacy policy last updated | 2026-07-23 | couldn't be read |
| Customer content may train models | not found in the text | couldn't be read |
| Terms restrict automated access | not found in the text | couldn't be read |
| Terms restrict benchmarking | yes | couldn't be read |
| Terms or service can change without notice | not found in the text | couldn't be read |
| Arbitration or class-action waiver | not found in the text | couldn't be read |
| Popularity | none | 32k stars |

## Verdicts

**Celeris-1 Decision.** Typed probabilities, image inputs and optional explanations suit routing and classification inside an agent. Both System One and OpenAI Decisions request formats are documented. The service remains early access under its terms, activation can queue, and prepaid credit expires after 30 days. The published accuracy and latency figures are Celeris measurements, not Anchor Terminal tests.

**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

### Celeris-1 Decision

1. Use the decision model path and matching model field. This model has no chat, Responses or models endpoint.
2. Use at most 512 questions per request, or 64 with explanations. Both endpoints reject streaming.
3. Preserve x_celeris in a custom Jev SDK response model when reading explanations. The default response type drops it.
4. Retry 429 with Retry-After and backoff. Stop on 402 until workspace credit is replenished.
5. Read usage.input_tokens for cost, including images and request overhead. Track credit expiry separately from token consumption.

### 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, Celeris-1 Decision or OpenAI Decisions API?

OpenAI Decisions API scores 71.5 (BB) on agent readiness against Celeris-1 Decision's 49.3 (D), and leads in every scored category.

### Which is cheaper for inference decision, Celeris-1 Decision or OpenAI Decisions API?

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

### Do Celeris-1 Decision and OpenAI Decisions API need an API key?

Both need an API key.

### Can an agent call Celeris-1 Decision and OpenAI Decisions API without installing anything?

Yes. Celeris-1 Decision has a hosted endpoint at https://inference.celeris.ai/celeris-1-decision/v1/systemone and OpenAI Decisions API at https://api.openai.com/v1/decisions.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/celeris-1-decision-vs-openai-decisions-api.json, and with the fewest tokens: https://www.anchorterminal.com/compare/celeris-1-decision-vs-openai-decisions-api.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "celeris-1-decision", "b": "openai-decisions-api"}`. From a terminal: `anchor compare celeris-1-decision openai-decisions-api`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/celeris-1-decision.json and https://www.anchorterminal.com/api/v1/tools/openai-decisions-api.json

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