Series · field notes
What people actually build
A new model lands. Within three days there are twenty projects on GitHub, a hundred posts about
them, and almost no way to tell which of it is real. So we read the projects themselves — the
code, the measurement files, the limits sections that nobody quotes — and write down what holds
up. Every note says what we ran and what we did not.
This series has one entry. It will grow when the next model does, and publishing an entry costs
one line on this page — no new navigation, no new card, no new anything.
Notes
Read 2026-09-20
Jev (TypeSafe) — a decision model that arrived with a company, a founder and a waitlist
Eleven repositories, one shape: the model picks, and the code owns everything else. The famous seven-second browser demo was mostly browser engineering — the median improved 9.450 s to 7.092 s, p = 0.25, and protocol calls fell 1,092 to 101.
We ran: Twenty of our own API calls (the label never moved; the confidence did), and an offline test run of the largest project — 31 passed in 0.44 s.
How this section works
Every entry here is a reading of primary sources: repositories, their own measurement files,
their own limits sections, and the vendor's documentation. Vendors' claims are labelled as
vendors' claims wherever they appear. Where we could not check something — because a harness
needs a browser we would not attach to, or a key we would not spend — the entry says so in
plain words rather than leaving the gap for a reader to discover.
That is the whole editorial rule, and it is the same one the rest of this site runs on: publish
a date you can point at, or publish nothing.
Source primary sources only — repositories, model cards, vendor documentation We do not republish other people's summaries; every claim is read from the file it came fromWhat we measured ourselves is stated per entry, and what we did not run is stated too
Where to go next
The other half of the pair: what it is, what it costs per million tokens, the three question types, and our own raw response.
The other way a model arrives on OpenRouter — anonymous and free, gone in days. Same index-and-entries shape as this one.
Every model we track, with price and context read from the public catalogue, and a dated provenance line under each table.
Read the Jev field notes → Jev reference Stealth line