# Celeris-1 Decision vs pplx-decider

> pplx-decider scores 62.9 (B) to Celeris-1 Decision's 49.3 (D) for decision models. Celeris-1 Decision is cheaper for decision models, $0 against $0 per 1M tokens. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/celeris-1-decision-vs-pplx-decider
- Markdown: https://www.anchorterminal.com/compare/celeris-1-decision-vs-pplx-decider.md (~2,550 tokens)
- Slim: https://www.anchorterminal.com/compare/celeris-1-decision-vs-pplx-decider.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/celeris-1-decision-vs-pplx-decider.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: 2026-10-09

pplx-decider scores 62.9 (B) on agent readiness against Celeris-1 Decision's 49.3 (D), and leads in 5 of 7 scored categories. Both do decision models. Celeris-1 Decision is cheaper for decision models, $0 against $0 per 1M tokens.

- Celeris-1 Decision: grade D, 49.3/100, rank #796 of 950. Markdown https://www.anchorterminal.com/tools/celeris-1-decision.md · JSON https://www.anchorterminal.com/api/v1/tools/celeris-1-decision.json
- pplx-decider: grade B, 62.9/100, rank #417 of 950. Markdown https://www.anchorterminal.com/tools/pplx-decider.md · JSON https://www.anchorterminal.com/api/v1/tools/pplx-decider.json
- Best decision models for AI agents: https://www.anchorterminal.com/best/decision-models/index.md
- All 66 decisions comparisons: https://www.anchorterminal.com/compare/decision-models/index.md

## 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 decision models, $0 against $0 per 1M tokens

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

### pplx-decider (B)

Good for: High-volume classification, routing and rubric scoring over text and images where a team wants a low hosted price and the option to run the same weights itself.

Ahead on:
- Reliability, 61 against 40
- Schema & documentation, 90 against 60
- Security & auth, 61 against 45
- Payments & pricing, 25 against 20
- Maintenance & community, 62 against 40

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

Watch for: The Decisions API was released in October 2026, so its incident record is days long, and Perplexity's FAQ says it gives no uptime guarantee


## Score by category

| Category | Weight | Celeris-1 Decision | pplx-decider | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 40 | 61 | pplx-decider +21 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 60 | 90 | pplx-decider +30 |
| Agent ergonomics | 13% (16.2 this run) | 80 | 76 | Celeris-1 Decision +4 |
| Security & auth | 14% (17.5 this run) | 45 | 61 | pplx-decider +16 |
| Payments & pricing | 10% (12.5 this run) | 20 | 25 | pplx-decider +5 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 40 | 62 | pplx-decider +22 |
| Transparency & trust | 7% (8.8 this run) | 53 | 52 | Celeris-1 Decision +1 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **49.3 · D** | **62.9 · B** | |

## Facts side by side

| Fact | Celeris-1 Decision | pplx-decider |
| --- | --- | --- |
| Kind | Model API | Model API |
| Vendor | Celeris (Marqo Inc) | Perplexity |
| Hosted endpoint | `https://inference.celeris.ai/celeris-1-decision/v1/systemone` | `https://api.perplexity.ai/v1/decisions` |
| Transports | HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Pay per use | Pay per use |
| Price for decision models | free | free |
| x402 | no | no |
| Licence | Proprietary hosted model under Celeris terms of service | Apache-2.0 for the published weights. The hosted Decisions API is a proprietary service |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-08 | 2026-10-05 |
| 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 |

## 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.

**pplx-decider.** The hosted Decisions API has an OpenAPI description, typed questions, documented limits and a published price of $0.02 per million input tokens, and the v1.1 weights are public under Apache-2.0. The API is days old, the official Python SDK has no method for it, and the governing terms and privacy notice could not be read on 9 October 2026.

## 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.

### pplx-decider

1. Send `Authorization: Bearer`. A key in `x-api-key` returns 401 on this endpoint.
2. Set `model` on every request. A missing or unknown model returns 400, and the guide shows a `-latest` name rejected.
3. Resize images to 2,048 tiles of 32 by 32 pixels or fewer before sending. Larger images end in a 504 after about a minute.
4. Check the HTTP status before parsing an error. 404 and 405 have empty bodies, 504 can be HTML, and `error.code` changes type.
5. For the weights, use the repository's `autojev` code. The card says default causal inference does not reproduce the evaluated setup.

## Questions

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

pplx-decider scores 62.9 (B) on agent readiness against Celeris-1 Decision's 49.3 (D), and leads in 5 of 7 scored categories.

### Which is cheaper for decision models, Celeris-1 Decision or pplx-decider?

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

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

Both need an API key.

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

Yes. Celeris-1 Decision has a hosted endpoint at https://inference.celeris.ai/celeris-1-decision/v1/systemone and pplx-decider at https://api.perplexity.ai/v1/decisions.


## For agents

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

## Other comparisons with Celeris-1 Decision or pplx-decider

- [Celeris-1 Decision vs Clef](https://www.anchorterminal.com/compare/celeris-1-decision-vs-cloudflare-clef.md)
- [Celeris-1 Decision vs Laya](https://www.anchorterminal.com/compare/celeris-1-decision-vs-convai-laya.md)
- [Celeris-1 Decision vs Decider](https://www.anchorterminal.com/compare/celeris-1-decision-vs-decider.md)
- [Celeris-1 Decision vs GLiClass](https://www.anchorterminal.com/compare/celeris-1-decision-vs-gliclass.md)
- [Celeris-1 Decision vs Kev](https://www.anchorterminal.com/compare/celeris-1-decision-vs-jaredpalmer-kev.md)
- [Celeris-1 Decision vs Liquid d1](https://www.anchorterminal.com/compare/celeris-1-decision-vs-liquid-d1.md)
- [Celeris-1 Decision vs OpenAI Decisions API](https://www.anchorterminal.com/compare/celeris-1-decision-vs-openai-decisions-api.md)
- [Celeris-1 Decision vs Strands Decider 2B](https://www.anchorterminal.com/compare/celeris-1-decision-vs-strands-decider.md)
- [Celeris-1 Decision vs Jev](https://www.anchorterminal.com/compare/celeris-1-decision-vs-typesafe-jev.md)
- [Celeris-1 Decision vs Vela 2.0](https://www.anchorterminal.com/compare/celeris-1-decision-vs-vela.md)
- [Clef vs pplx-decider](https://www.anchorterminal.com/compare/cloudflare-clef-vs-pplx-decider.md)
- [Laya vs pplx-decider](https://www.anchorterminal.com/compare/convai-laya-vs-pplx-decider.md)
- [Decider vs pplx-decider](https://www.anchorterminal.com/compare/decider-vs-pplx-decider.md)
- [GLiClass vs pplx-decider](https://www.anchorterminal.com/compare/gliclass-vs-pplx-decider.md)
- [Kev vs pplx-decider](https://www.anchorterminal.com/compare/jaredpalmer-kev-vs-pplx-decider.md)
- [Liquid d1 vs pplx-decider](https://www.anchorterminal.com/compare/liquid-d1-vs-pplx-decider.md)
- [OpenAI Decisions API vs pplx-decider](https://www.anchorterminal.com/compare/openai-decisions-api-vs-pplx-decider.md)
- [pplx-decider vs Strands Decider 2B](https://www.anchorterminal.com/compare/pplx-decider-vs-strands-decider.md)
- [pplx-decider vs Jev](https://www.anchorterminal.com/compare/pplx-decider-vs-typesafe-jev.md)
- [pplx-decider vs Vela 2.0](https://www.anchorterminal.com/compare/pplx-decider-vs-vela.md)