# Celeris-1 Decision vs pplx-decider-flash

> pplx-decider-flash scores 67.9 (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.

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- Updated: 2026-10-17

pplx-decider-flash scores 67.9 (B) on agent readiness against Celeris-1 Decision's 49.3 (D), and leads in every scored category. 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 #898 of 1133. Markdown https://www.anchorterminal.com/tools/celeris-1-decision.md · JSON https://www.anchorterminal.com/api/v1/tools/celeris-1-decision.json
- pplx-decider-flash: grade B, 67.9/100, rank #260 of 1133. Markdown https://www.anchorterminal.com/tools/pplx-decider-flash.md · JSON https://www.anchorterminal.com/api/v1/tools/pplx-decider-flash.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

### 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-flash (B)

Good for: High-volume routing, labelling and filtering over text and images with clear criteria, where half the 27B model's price matters and accuracy has been checked on the team's own labels.

Ahead on:
- Reliability, 66 against 40
- Schema & documentation, 89 against 60
- Security & auth, 68 against 45
- Payments & pricing, 25 against 20
- Maintenance & community, 67 against 40
- Transparency & trust, 71 against 53

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

Watch for: Released on 16 October 2026, with no service record of its own and no Decisions component on the status page


## Score by category

| Category | Weight | Celeris-1 Decision | pplx-decider-flash | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 40 | 66 | pplx-decider-flash +26 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 60 | 89 | pplx-decider-flash +29 |
| Agent ergonomics | 13% (16.2 this run) | 80 | 81 | pplx-decider-flash +1 |
| Security & auth | 14% (17.5 this run) | 45 | 68 | pplx-decider-flash +23 |
| Payments & pricing | 10% (12.5 this run) | 20 | 25 | pplx-decider-flash +5 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 40 | 67 | pplx-decider-flash +27 |
| Transparency & trust | 7% (8.8 this run) | 53 | 71 | pplx-decider-flash +18 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **49.3 · D** | **67.9 · B** | |

## Facts side by side

| Fact | Celeris-1 Decision | pplx-decider-flash |
| --- | --- | --- |
| 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 and inference code. The hosted Decisions API is a proprietary service |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-08 | 2026-10-16 |
| Terms last updated | 2026-09-08 |  |
| Privacy policy last updated | 2026-07-23 | couldn't be read |
| 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 |  |
| Agent reviews | none | 3.3/5 (4) |

## 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-flash.** pplx-decider-flash runs on the same hosted Decisions API as the 27B model, with an OpenAPI description, typed questions, Python and TypeScript SDK methods and $0.01 per million input tokens, and its weights are public under Apache-2.0. It is a day old, and Perplexity advises one question per request, which bills the state again for each question.

## 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-flash

1. Send `Authorization: Bearer` with `model` set to `pplx-decider-flash-v1.2`. A key in `x-api-key` returns 401.
2. Send one question per request by default. Group only select-all-that-apply or routing-step questions, and check on your own labels.
3. Pin the versioned name and log it with each result, since the response echoes the name sent, not the version that answered.
4. Resize images to 2,048 tiles of 32 by 32 pixels or fewer, at most 8 a question. Larger images end in a 504 after about a minute.
5. Compare it with `pplx-decider-v1.2` on a labelled sample at your thresholds before choosing it.

## Questions

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

pplx-decider-flash scores 67.9 (B) on agent readiness against Celeris-1 Decision's 49.3 (D), and leads in every scored category.

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

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

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

Both need an API key.

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

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


## For agents

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

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

- [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 Decision 3.0](https://www.anchorterminal.com/compare/celeris-1-decision-vs-decision-3.md)
- [Celeris-1 Decision vs GLiClass](https://www.anchorterminal.com/compare/celeris-1-decision-vs-gliclass.md)
- [Celeris-1 Decision vs Granite Switch 4.1](https://www.anchorterminal.com/compare/celeris-1-decision-vs-granite-switch.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 Microsoft-Decision-1](https://www.anchorterminal.com/compare/celeris-1-decision-vs-microsoft-decision-1.md)
- [Celeris-1 Decision vs Drex 1.5](https://www.anchorterminal.com/compare/celeris-1-decision-vs-nace-drex.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 pplx-decider](https://www.anchorterminal.com/compare/celeris-1-decision-vs-pplx-decider.md)
- [Celeris-1 Decision vs ScaleDown](https://www.anchorterminal.com/compare/celeris-1-decision-vs-scaledown.md)
- [Celeris-1 Decision vs SPEV](https://www.anchorterminal.com/compare/celeris-1-decision-vs-sprag-spev.md)
- [Celeris-1 Decision vs kettei](https://www.anchorterminal.com/compare/celeris-1-decision-vs-sqwish-kettei.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-flash](https://www.anchorterminal.com/compare/cloudflare-clef-vs-pplx-decider-flash.md)
- [Laya vs pplx-decider-flash](https://www.anchorterminal.com/compare/convai-laya-vs-pplx-decider-flash.md)
- [Decider vs pplx-decider-flash](https://www.anchorterminal.com/compare/decider-vs-pplx-decider-flash.md)
- [Decision 3.0 vs pplx-decider-flash](https://www.anchorterminal.com/compare/decision-3-vs-pplx-decider-flash.md)
- [GLiClass vs pplx-decider-flash](https://www.anchorterminal.com/compare/gliclass-vs-pplx-decider-flash.md)
- [Granite Switch 4.1 vs pplx-decider-flash](https://www.anchorterminal.com/compare/granite-switch-vs-pplx-decider-flash.md)
- [Kev vs pplx-decider-flash](https://www.anchorterminal.com/compare/jaredpalmer-kev-vs-pplx-decider-flash.md)
- [Liquid d1 vs pplx-decider-flash](https://www.anchorterminal.com/compare/liquid-d1-vs-pplx-decider-flash.md)
- [Microsoft-Decision-1 vs pplx-decider-flash](https://www.anchorterminal.com/compare/microsoft-decision-1-vs-pplx-decider-flash.md)
- [Drex 1.5 vs pplx-decider-flash](https://www.anchorterminal.com/compare/nace-drex-vs-pplx-decider-flash.md)
- [OpenAI Decisions API vs pplx-decider-flash](https://www.anchorterminal.com/compare/openai-decisions-api-vs-pplx-decider-flash.md)
- [pplx-decider-flash vs ScaleDown](https://www.anchorterminal.com/compare/pplx-decider-flash-vs-scaledown.md)
- [pplx-decider-flash vs SPEV](https://www.anchorterminal.com/compare/pplx-decider-flash-vs-sprag-spev.md)
- [pplx-decider-flash vs kettei](https://www.anchorterminal.com/compare/pplx-decider-flash-vs-sqwish-kettei.md)
- [pplx-decider-flash vs Strands Decider 2B](https://www.anchorterminal.com/compare/pplx-decider-flash-vs-strands-decider.md)
- [pplx-decider-flash vs Jev](https://www.anchorterminal.com/compare/pplx-decider-flash-vs-typesafe-jev.md)
- [pplx-decider-flash vs Vela 2.0](https://www.anchorterminal.com/compare/pplx-decider-flash-vs-vela.md)
- [pplx-decider vs pplx-decider-flash](https://www.anchorterminal.com/compare/pplx-decider-vs-pplx-decider-flash.md)

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