# Decider vs Liquid d1

> Decider scores 69.5 (B) on agent readiness against Liquid d1's 43.5 (E), and leads in 6 of 7 scored categories. Liquid d1 leads on transparency & trust. Both do inference decision. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/decider-vs-liquid-d1
- Markdown: https://www.anchorterminal.com/compare/decider-vs-liquid-d1.md (~2,300 tokens)
- Slim: https://www.anchorterminal.com/compare/decider-vs-liquid-d1.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/decider-vs-liquid-d1.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

Decider scores 69.5 (B) on agent readiness against Liquid d1's 43.5 (E), and leads in 6 of 7 scored categories. Liquid d1 leads on transparency & trust. Both do inference decision.

- 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
- Liquid d1: grade E, 43.5/100, rank #784 of 842. Markdown https://www.anchorterminal.com/tools/liquid-d1.md · JSON https://www.anchorterminal.com/api/v1/tools/liquid-d1.json

## Which one, for what

### 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 21
- Schema & documentation, 78 against 59
- Agent ergonomics, 80 against 63
- Payments & pricing, 60 against 27
- Maintenance & community, 87 against 60

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

### Liquid d1 (E)

Good for: Classification, routing, yes or no gates and rubric scoring over text and images at a low per-token price, or on your own hardware with d1-3B where data can't leave.

Ahead on:
- Transparency & trust, 54 against 46

Also in its favour:
- A hosted endpoint, with nothing to install

Watch for: The terms of 30 September 2026 allow Liquid to train on API content, with no opt-out or zero-retention option found


## Score by category

| Category | Weight | Decider | Liquid d1 | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 90 | 21 | Decider +69 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 78 | 59 | Decider +19 |
| Agent ergonomics | 13% (16.2 this run) | 80 | 63 | Decider +17 |
| Security & auth | 14% (17.5 this run) | 38 | 35 | Decider +3 |
| Payments & pricing | 10% (12.5 this run) | 60 | 27 | Decider +33 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 87 | 60 | Decider +27 |
| Transparency & trust | 7% (8.8 this run) | 46 | 54 | Liquid d1 +8 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **69.5 · B** | **43.5 · E** | |

## Facts side by side

| Fact | Decider | Liquid d1 |
| --- | --- | --- |
| Kind | Model API | Model API |
| Vendor | Mark Marosi (Mapika) | Liquid AI |
| Hosted endpoint | no (local only) | `https://api.liquid.ai/decisions/v1/systemone` |
| Transports | HTTP | HTTP |
| Auth | None | API key |
| Pricing | Free | Freemium |
| x402 | no | no |
| Licence | Apache-2.0 (code and weights) | The hosted d1 model is proprietary under Liquid AI's terms of service. The d1-3B and d1-omni-600M weights and model code are under the LFM Open Licence v1.0, which is based on Apache-2.0 and conditions commercial use on annual revenue under $10 million. Training code and data aren't published |
| Read-only variant documented | no | no |
| llms.txt | no | yes |
| Last release | 2026-10-07 | 2026-10-07 |
| Terms last updated | no document linked | 2026-09-30 |
| Privacy policy last updated | no document linked | 2026-09-30 |
| Customer content may train models |  | yes |
| Terms restrict automated access |  | not found in the text |
| Terms restrict benchmarking |  | not found in the text |
| Terms or service can change without notice |  | not found in the text |
| Arbitration or class-action waiver |  | not found in the text |
| Popularity | 1.1k stars, 2.7k PyPI/wk | none |

## Verdicts

**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.

**Liquid d1.** The hosted API costs $0.04 per million input tokens and takes TypeSafe's System One request, and the d1-3B weights run locally through Transformers or llama.cpp. Liquid's terms allow it to train on API content, and no status page, rate limits or error reference were found. The family launched between 22 September and 7 October 2026.

## Before you call either

### 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

### Liquid d1

1. POST to https://api.liquid.ai/decisions/v1/systemone with a `liquid_` key as a Bearer header. This is not a chat-completions endpoint
2. Use `d1` for images. `d1:free` is text-only and answers that it does not accept images
3. Send images as Base64 data URLs in `images`, at most 8, with the whole JSON body under 4.5 MB. Remote image URLs are refused
4. Budget tokens per question. Each question is billed as its own prompt, with its text and every image counted again
5. Don't send confidential content to the hosted API, since the terms allow training on it. Run d1-3B locally for that data

## Questions

### Which is better for AI agents, Decider or Liquid d1?

Decider scores 69.5 (B) on agent readiness against Liquid d1's 43.5 (E), and leads in 6 of 7 scored categories. Liquid d1 leads on transparency & trust.

### Do Decider and Liquid d1 need an API key?

Decider needs no key. Liquid d1 needs an API key.

### Can an agent call Decider and Liquid d1 without installing anything?

No hosted endpoint is listed for Decider. Liquid d1 has a hosted endpoint at https://api.liquid.ai/decisions/v1/systemone.

### Are Decider and Liquid d1 open source?

Decider is open source (Apache-2.0 (code and weights)). No open-source release is listed for Liquid d1.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/decider-vs-liquid-d1.json, and with the fewest tokens: https://www.anchorterminal.com/compare/decider-vs-liquid-d1.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "decider", "b": "liquid-d1"}`. From a terminal: `anchor compare decider liquid-d1`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/decider.json and https://www.anchorterminal.com/api/v1/tools/liquid-d1.json

## Other comparisons with Decider or Liquid d1

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