# Celeris-1 Decision vs Decider

> Decider scores 69.5 (B) on agent readiness against Celeris-1 Decision's 49.3 (D), and leads in 4 of 7 scored categories. Celeris-1 Decision leads on security & auth and transparency & trust. Both do inference decision. Celeris-1 Decision is cheaper for inference decision, $0…

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- 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: 2026-10-09

Decider scores 69.5 (B) on agent readiness against Celeris-1 Decision's 49.3 (D), and leads in 4 of 7 scored categories. Celeris-1 Decision leads on security & auth and transparency & trust. Both do inference decision. Celeris-1 Decision is cheaper for inference decision, $0 against $0 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
- Decider: grade B, 69.5/100, rank #172 of 842. Markdown https://www.anchorterminal.com/tools/decider.md · JSON https://www.anchorterminal.com/api/v1/tools/decider.json

## Which one, for what

### Celeris-1 Decision (D)

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

Ahead on:
- Security & auth, 45 against 38
- Transparency & trust, 53 against 46

Also in its favour:
- Cheaper for inference decision, $0 against $0 per 1M tokens
- A hosted endpoint, with nothing to install

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

### 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 40
- Schema & documentation, 78 against 60
- Payments & pricing, 60 against 20
- Maintenance & community, 87 against 40

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


## Score by category

| Category | Weight | Celeris-1 Decision | Decider | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 40 | 90 | Decider +50 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 60 | 78 | Decider +18 |
| Agent ergonomics | 13% (16.2 this run) | 80 | 80 | even |
| Security & auth | 14% (17.5 this run) | 45 | 38 | Celeris-1 Decision +7 |
| Payments & pricing | 10% (12.5 this run) | 20 | 60 | Decider +40 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 40 | 87 | Decider +47 |
| Transparency & trust | 7% (8.8 this run) | 53 | 46 | Celeris-1 Decision +7 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **49.3 · D** | **69.5 · B** | |

## Facts side by side

| Fact | Celeris-1 Decision | Decider |
| --- | --- | --- |
| Kind | Model API | Model API |
| Vendor | Celeris (Marqo Inc) | Mark Marosi (Mapika) |
| Hosted endpoint | `https://inference.celeris.ai/celeris-1-decision/v1/systemone` | no (local only) |
| Transports | HTTP | HTTP |
| Auth | API key | None |
| Pricing | Pay per use | Free |
| Price for inference decision | free | free |
| x402 | no | no |
| Licence | Proprietary hosted model under Celeris terms of service | Apache-2.0 (code and weights) |
| Read-only variant documented | no | no |
| llms.txt | yes | no |
| Last release | 2026-10-08 | 2026-10-07 |
| Terms last updated | 2026-09-08 | no document linked |
| Privacy policy last updated | 2026-07-23 | no document linked |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | not found in the text |  |
| Terms restrict benchmarking | yes |  |
| Terms or service can change without notice | not found in the text |  |
| Arbitration or class-action waiver | not found in the text |  |
| Popularity | none | 1.1k stars, 2.7k PyPI/wk |

## 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.

**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.

## 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.

### 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

## Questions

### Which is better for AI agents, Celeris-1 Decision or Decider?

Decider scores 69.5 (B) on agent readiness against Celeris-1 Decision's 49.3 (D), and leads in 4 of 7 scored categories. Celeris-1 Decision leads on security & auth and transparency & trust.

### Which is cheaper for inference decision, Celeris-1 Decision or Decider?

Celeris-1 Decision, at free against free for Decider. These are the vendors' published prices for the job.

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

Celeris-1 Decision needs an API key. Decider needs no key.

### Can an agent call Celeris-1 Decision and Decider without installing anything?

Celeris-1 Decision has a hosted endpoint at https://inference.celeris.ai/celeris-1-decision/v1/systemone. No hosted endpoint is listed for Decider.

### Are Celeris-1 Decision and Decider open source?

No open-source release is listed for Celeris-1 Decision. Decider is open source (Apache-2.0 (code and weights)).


## For agents

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

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