What opened on 21 September 2026
Jev launched on 15 September 2026 as TypeSafe’s first System One model, behind early access. Checked on 21 September: the homepage no longer asks you to join a waitlist (the CTA is Sign up and API console), typesafe.ai/join-the-waitlist is a 404, and console.typesafe.ai is a public login with Playground and Create key.
This site is independent and is not TypeSafe. The product itself did not change: Jev still returns a choice, a score, or a noul probability. It still does not write chat.
- 15 Sep: launch, waitlist / early access.
- 16 Sep: Vercel AI Gateway listed typesafe-ai/jev; other gateways followed.
- 21 Sep: waitlist URL gone; Console login, Playground, and API Keys are open.
How to call the public Jev API
Sign in at console.typesafe.ai, create a key on API Keys, export TYPESAFE_API_KEY, then POST JSON to https://api.typesafe.ai/v1/systemone. Pin jev-1.13.0 once you tune thresholds; jev-latest and jev-preview currently resolve to the same version. Official SDKs are typesafe-sdk (Python) and @typesafe-ai/sdk (Node). Docs: docs.typesafe.ai/introduction/quickstart.
Console billing (21 September 2026) shows a $5.00 monthly credit, remaining $5.00, granted 20 September and expiring 20 October 2026 UTC, with no purchases yet. Usage is estimated at $0.042 / 1M input tokens and free output — about 119 million input tokens on that $5. Auto-recharge needs a card; Add funds is on the same billing screen.
- Console: console.typesafe.ai (Playground + API Keys)
- HTTP: POST https://api.typesafe.ai/v1/systemone
- Auth: Authorization: Bearer <key>
- Price: $0.042 / 1M input, output free; $5 monthly credit on the live Console
curl -X POST https://api.typesafe.ai/v1/systemone \
-H "Authorization: Bearer $TYPESAFE_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "jev-1.13.0",
"state": "Customer billed twice, wants a refund today.",
"questions": {
"topic": {
"type": "choice",
"instructions": "Which queue?",
"criteria": { "billing": "invoices, refunds", "bug": "crashes", "other": "else" }
}
}
}'Open API, closed weights
Opening the endpoint is not a weight drop. You still cannot download Jev, run it air-gapped, or treat it as Apache-2.0. Local open-weight System One work lives in Laya (github.com/NandhaKishorM/laya). Keep the names honest if you ship a hybrid.
Demand in the first week was already high enough that some reports mention temporary TypeSafe API disruptions. Put a fallback behind the branch — rules, a classifier, or a larger model — even now that keys are easy to get.
Gateways still work
You do not have to use a TypeSafe key. Vercel AI Gateway serves typesafe-ai/jev. OpenRouter and Cloudflare have also listed Jev under their own IDs. Those paths keep their own billing, rate limits, and request shapes. The native TypeSafe call is still the one with official SDKs and version pins such as jev-1.13.0.
FAQ
Is the Jev API open now?
Yes. On 21 September 2026 the TypeSafe homepage CTA is Sign up / API console, typesafe.ai/join-the-waitlist returns 404, and console.typesafe.ai is a public Google-or-email login with Playground and Create key. Call POST https://api.typesafe.ai/v1/systemone with that key.
Do I still need to join a Jev waitlist?
No. Launch week (15 September 2026) used early access. The waitlist URL is gone. Sign in at console.typesafe.ai and create a key under API Keys.
Is Jev free now that the API is public?
No unlimited free tier. Console billing shows a $5.00 monthly credit (granted 20 September 2026, remaining $5.00, expires 20 October 2026 UTC). Usage is estimated at $0.042 per million input tokens with output free — about 119 million input tokens on that $5. Add funds when the credit runs out.
Where do I get a Jev API key?
Create one under API Keys at console.typesafe.ai after you sign in. Store it as TYPESAFE_API_KEY. Do not put it in a frontend bundle. Gateways (Vercel typesafe-ai/jev, OpenRouter, Cloudflare) still work with their own credentials.
Does “API open” mean Jev is open source?
No. The hosted endpoint is public. The weights are not. If you need a local Apache-2.0 decision model, that is Laya — a different product. See /jev-vs-laya and /is-jev-open-source.