About usejev.dev
This is an unofficial, community site. It is not affiliated with, endorsed by, or sponsored by TypeSafe AI. "Jev" and "TypeSafe" are names of their owner and are used here only to describe the product the examples are written for.
What this site is
A catalog of practical patterns for Jev, the System One model that TypeSafe AI opened for early access on September 15, 2026 (launch announcement). Each use case shows a question design, Python and TypeScript code, decision logic, and a cost estimate.
How the content is checked
- Code samples use only endpoints, fields, and SDK methods documented in theHTTP API reference, the Python SDK docs, and theJavaScript SDK docs. Anything that could not be verified is labelled "illustrative" in the sample.
- Example responses are illustrative. They show the documented response shape with made-up probabilities, not measured output. There are no benchmarks, testimonials, or quotes on this site.
- Prices and limits are taken from the official models page and can change. Check the source before you budget.
Official sources
- TypeSafe AI website
- Official TypeSafe documentation
- HTTP API reference
- Official confidence guide
- Known limitations of jev-1.13
- Launch post: Introducing System One Models and Jev
Analytics
This site uses Yandex.Metrika to count visits and see which pages are useful, including click maps and anonymized session replays. Text typed into the submission form is not recorded. There are no ads and no data is sold.
Corrections
If a sample is out of date or a claim is wrong, open an issue or pull request on the site's repository. Accuracy matters more here than coverage.