System1 Models Alternatives
Hosted open decision models behind a Jev-compatible API, with an EU-only tier and a lower-cost global tier
System1 Models hosts open decision models behind a Jev-compatible API: send a state and typed questions, get back a probability for every allowed answer.
Explore 4 alternatives to System1 Models across 1 category. Updated October 2026.
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Top System1 Models alternatives at a glance
- Clef. Cloudflare's open decision models: typed choices, scores and yes/no answers with probabilities, hosted or self-run.
- Laya. Open-source multilingual decision model: typed choices, scores and yes/no answers in one forward pass.
- TypeSafe Jev. Hosted decision model that returns typed choices, scores and yes/no answers with calibrated confidence.
- Kev. Open decision models from 0.8B to 27B, built on Qwen and compatible with TypeSafe's Jev API.
Compare System1 Models with its alternatives
| Product | Pricing Model | Free Tier | Open Source | Hosting | HQ |
|---|---|---|---|---|---|
| System1 Models | Pay-per-use | — | — | — | ๐ฉ๐ช Germany |
| Clef | Pay-per-use | — | ✓ APACHE-2.0 | Cloud + Self-hosted | ๐บ๐ธ United States |
| Laya | Free | — | ✓ APACHE-2.0 | Self-hosted | — |
| TypeSafe Jev | Pay-per-use | — | — | Cloud | ๐บ๐ธ United States |
| Kev | Free | — | ✓ APACHE-2.0 | Self-hosted | — |
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