Decision Models Alternatives
Hosted open decision models behind a Jev-compatible API, with an EU-only tier and a lower-cost Peer-to-Peer tier
Decision Models (decisionmodels.io, formerly System1 Models) hosts open decision models behind a Jev-compatible API: send a state and typed questions, get a probability for every allowed answer.
Explore 21 alternatives to Decision Models across 1 category. Updated October 2026.
Top Decision Models alternatives at a glance
- Nace.AI Drex. Jev-compatible decision models with open weights: a probability for every option from one pass, 128K context
- Clef. Cloudflare's open decision models: typed choices, scores and yes/no answers with probabilities, hosted or self-run.
- OpenAI Decisions API. Typed answers with probabilities for yes/no checks, fixed choices and rubric scores
- ScaleDown Classify-1. Jev-compatible decision API for classification: label probabilities over text, images and documents up to 1M tokens
- Liquid AI d1. Open-weight 3B decision model on LFM2.5-VL: typed answers over text, JSON and images in one forward pass
Compare Decision Models with its alternatives
| Product | Pricing Model | Free Tier | Open Source | Hosting | HQ |
|---|---|---|---|---|---|
| Decision Models | Pay-per-use | — | — | Cloud | ๐ฉ๐ช Germany |
| Nace.AI Drex | Freemium | ✓ | ✓ Nace.AI Open RAIL-M | Cloud + Self-hosted | ๐บ๐ธ United States |
| Clef | Pay-per-use | — | ✓ APACHE-2.0 | Cloud + Self-hosted | ๐บ๐ธ United States |
| OpenAI Decisions API | Pay-per-use | — | — | Cloud | ๐บ๐ธ United States |
| ScaleDown Classify-1 | Freemium | ✓ | — | Cloud | ๐บ๐ธ United States |
| Liquid AI d1 | Freemium | ✓ | ✓ LFM Open License v1.0 | Cloud + Self-hosted | ๐บ๐ธ United States |
| Respan Span | Freemium | ✓ | — | Cloud | ๐บ๐ธ United States |
| Celeris-1 Decision | Pay-per-use | — | — | Cloud | ๐บ๐ธ United States |
| Upstage Solar Decide | Pay-per-use | — | — | Cloud | ๐ฐ๐ท South Korea |
| Mapika Decider | Free | ✓ | ✓ APACHE-2.0 | Self-hosted | — |
| Perplexity pplx-decider | — | ✓ | ✓ APACHE-2.0 | Cloud + Self-hosted | ๐บ๐ธ United States |
| Laya | Free | — | ✓ APACHE-2.0 | Self-hosted | ๐ฎ๐ณ India |
| Bespoke Nimble | Pay-per-use | ✓ | ✓ Apache-2.0 (9B), CC BY-NC 4.0 (27B) | Cloud + Self-hosted | — |
| Strands Decider | Free | ✓ | ✓ APACHE-2.0 | Self-hosted | ๐บ๐ธ United States |
| Microsoft-Decision-1 | Pay-per-use | — | — | Cloud | ๐บ๐ธ United States |
| SubQ Snap | Pay-per-use | ✓ | — | Cloud | ๐บ๐ธ United States |
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