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Decision Models — Jev-compatible decision API
A hosted decision API serving open-weights models behind a Jev-compatible request shape: one answer per option with probabilities for s1-fast, s1-pro and s1-vision, on a Peer-to-Peer tier or an EU tier built for GDPR. Not affiliated with TypeSafe.
- Reading time
- 3 min
- Published by
- Community
- Author
- Decision Models
- Last verified
- Oct 2026
- Capabilities
- Requires API key
Highlights
- One API covers s1-fast, s1-pro and s1-vision; s1-fast starts at $0.019 (Peer-to-Peer) or $0.021 (EU) per 1M input tokens, with output free.
- Launch promo: s1-fast-1 and s1-pro-1 free on the Peer-to-Peer tier with code LAUNCH until Sunday 18 Oct 2026, midnight Berlin (22:00 UTC).
- s1-pro runs vLLM-SR d3 (Apache-2.0) since 12 Oct 2026; the previous Perplexity Decider v1.1 stays pinned as s1-pro-2 until at least 11 Nov 2026.
- s1-pro is listed #1 on the public Decision Index 0.3.2 at 66.26 (12 Oct 2026, 13:29 UTC); throughput claims are the operator's own measurements.
- The EU tier keeps inference on contracted EU operators with a DPA at signup; Peer-to-Peer network keys can use independent providers that may store content.
Watch out
Page text fetched 2026-10-17. Pricing, the launch promo and benchmark claims - the Decision Index placement and throughput multiples - are the operator's own, labelled 'measured by us' with methods on /evidence; the promo for s1-fast-1 and s1-pro-1 was due to end 18 Oct 2026, 22:00 UTC. GDPR, EU AI Act and no-storage claims come from the site and were not independently verified, and the page warns against sending personal data on network-enabled keys.
Questions about this entry
Short answers drawn from the linked project or page.
A separate service that hosts open-weight decision models behind a Jev-compatible API: send a state and named typed questions, receive one answer per option with probabilities. The site states it is not affiliated with TypeSafe and that Jev is a TypeSafe trademark referenced nominatively.
The lineup lists s1-pro (vLLM-SR d3, 26B FP8), the pinned s1-pro-2 (Perplexity Decider v1.1), s1-fast and s1-vision (Blink v0.3 26B-A4B), quyet-1-large and the CPU-based s1-llm-auto-router. s1-pro takes up to three questions per call; s1-fast, s1-vision and quyet-1-large take one.
List prices per 1M input tokens with output free: s1-fast $0.019 Peer-to-Peer or $0.021 EU, s1-vision $0.031/$0.032 and s1-pro $0.080/$0.084. There is a free allowance by invitation and top-ups from EUR 1; with code LAUNCH the two REAX network models were free until 18 Oct 2026.
Peer-to-Peer starts on spare EU capacity and, for opted-in keys, can draw on rented worldwide GPUs whose independent providers may see and store content. The EU tier runs only on contracted EU operators, includes a DPA at signup and never uses the peer-to-peer network or stores payloads.
Sign in with Google, create an API key in the dashboard and send a request with a state plus noul, choice or score questions. The site links a quickstart, API reference, a hosted MCP server, llms.txt and OpenAPI JSON, and each response names the answering model version.
The site says it does not store prompts or outputs or use them for training, and keeps only billing usage records. On keys with network processing enabled, independent peer-to-peer providers may store content, and the site advises not sending personal data, secrets or confidential content there.
It targets narrow, well-defined decisions; the site recommends a frontier LLM or human review for open-ended writing and difficult reasoning, and validating representative cases first. Each question, including its state, is capped at 8,192 input tokens, and s1-fast probabilities can differ slightly between identical batched requests.
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