Jev vs OpenJev
OpenJev is an open, self-hosted decision model — including builds that read images. Optio gives you hosted Jev over a typed REST API. What self-hosting buys, what it costs to operate, and when each fits. Independent hosted gateway; not the official TypeSafe site.
What OpenJev is
OpenJev is an open, self-hosted decision model. The DiffusionGemma build can answer questions about images as well as text. You bring the GPU and you operate the server: capacity, version upgrades, monitoring, and a fallback when it is busy. Note that this is a different project from SemIf, which used the OpenJev name earlier — check which model a repo actually serves before pointing production at it.
What stays on you
There is no vendor account and no credit pack: you choose the hardware, the runtime version and what you log. That is the point of a self-hosted model — and it is also the work. Budget for the honest list: serving latency under load, model versioning, calibration checks after upgrades, and someone to page at 3 a.m.
What the hosted path handles for you
Optio runs the hosted Jev path: one REST endpoint, keys and workspace billing, credits that never expire, and a rate-limit envelope that scales with your plan (free 20 req/min, Starter 120/min, Pro 600/min, Team 2,000/min). You supply request bodies; the model version, upstream capacity and retries-under-failure are ours to operate.
When to pick which
Pick OpenJev when self-hosting is the requirement — air-gapped environments, full data-path control, or deep image support — and you can staff the operations. Pick Jev through Optio when the requirement is a decision you can threshold today: same request shape, no servers, and a free playground to check calibration on your own cases before spending anything.
Strengths and honest limits
Jev's honest limits: text only (no image questions), eight questions per request, and hosted means someone else owns the weights — if the requirement is literally "the model must run inside our VPC", a hosted endpoint is disqualified no matter how good it is. Know which requirement you actually have before comparing anything else.
Quick comparison
| Question | Jev | OpenJev |
|---|---|---|
| Hosting | Managed by Optio | You operate the GPU and the server |
| Modalities | Text | Text and images (DiffusionGemma build) |
| Operations | None — endpoint, keys, credits | Capacity, versions, calibration checks, on-call |
| Cost shape | Per use: 1 credit ≈ 1,000 input tokens | Compute + your time; near-zero marginal cost |
FAQ
- Is OpenJev a copy of Jev's weights?
- No. It is an independent open project that speaks a similar typed-decision contract. Answer spaces, calibration and behavior on your data all differ — validate on your own examples before trusting either.
- Does Optio offer an OpenJev endpoint?
- No. Optio calls Jev only. We do not ship or host OpenJev weights, and we do not resell the open project.
- Which is quicker to production?
- The hosted path, almost always: create a key, paste the request from the free playground, ship behind a flag the same day. Self-hosting wins later, and only for teams who need the weight-level control enough to own the ops.
- Is this the official Jev site?
- No. Optio is an independently operated gateway for calling Jev and is not affiliated with TypeSafe or with any alternative model mentioned on this page.