Inference for openSystem One models

Typed answers with calibrated confidence, in milliseconds. Codiv serves OpenJev through a Jev-compatible API. Every account gets 100M input tokens free.

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See it in action

codiv

Decisions, not tokens

A System One model reads your data once and answers every question with a probability, like a fast intuition you can measure.

Typed answers

Ask yes/no, choice and score questions. Every answer fits your schema by construction, because nothing is generated or parsed.

Calibrated confidence

Each answer is a full probability distribution with a confidence score, so thresholds actually mean something.

Milliseconds

One denoising step answers a whole set of questions. A typical request takes tens of milliseconds of model time.

Jev-compatible

The same wire API as TypeSafe's Jev. Their Python and TypeScript SDKs work unchanged; change the base URL.

Open all the way down

Open weights and an Apache-2.0 server. Anything you build on Codiv, you can also run on your own GPU.

Free to start

100M input tokens for every account while the experiment runs. No card required.

Playground

Try it in the browser

Typed questions, photos, chess, gomoku and chat, with every probability on screen. Sign in and run them on your free quota.

Any state and questions, with every request option.

Try it

state

Hi, I think I was charged twice for September. Could you take a look when you get a chance?

questions

urgentnoulNeeds a reply within the hour?
teamchoiceoutage · billing · feature
tonescorecalm · annoyed · furious

urgentno

yes

99%

teambillingconf 0.94

billing

99%

outage

feature

<1%

tonecalmconf 0.67

calm

90%

annoyed

furious

one denoising step · 38 ms

A replay of typical answers. The playground runs the real API on your free quota.

Models

Open models, served fast

OpenJev 0.1

Live

DiffusionGemma 26B-A4B turned into a System One model: the answer template goes onto the diffusion canvas and one denoising step reads a distribution for every answer.

Model id: openjev-latest
Question types: noul · choice · score
Base model: DiffusionGemma 26B-A4B, NVFP4
License: Apache-2.0, weights and server

Model details Source

Planned

More System One models

Codiv is built to serve any open System One model. New models and sizes will be added as open diffusion models land.

Drop-in

Already using Jev? Change one line.

Codiv speaks the same API as TypeSafe's Jev, down to the error shapes and request ids. Point the official SDKs at Codiv and your code keeps working.

Compatibility notes →

# Python or TypeScript: the official TypeSafe SDKs
export TYPESAFE_BASE_URL=https://api.codiv.ai
export TYPESAFE_API_KEY=sk-codiv-…

Free public experiment

Free for everyone

Free

Available now

No card required

100M System One tokens per account
10M text-generation tokens
All models, including OpenJev
60 requests per minute per key
Usage dashboard and up to 10 keys

Get a free API key

Roadmap

OpenJev 0.1 public experiment
Live
DiffusionGemma 26B-A4B as a System One model, served free on api.codiv.ai.
Dashboard, keys & usage
Live
Sign in with Google, GitHub or email. Track tokens per day.
Image input
Live
Ask typed questions about up to 8 images per request, alongside the state.
Text generation
Live
The same DiffusionGemma at an OpenAI-compatible /v1/chat/completions, with its own free quota.
Playground
Live
Try reads, photos, chess, gomoku and chat in the browser, with every probability shown.
OpenJev 1.0
Planned
Once vLLM PR #57250 is merged upstream. openjev-latest will move to it.
Batch mode
Planned
Send thousands of states in one call and collect the answers when they're ready. Built for backfills and nightly jobs.
More open System One models
Planned
New models and sizes as open diffusion models land.

Make your first decision in five minutes

Get a free API key Quickstart

Inference for openSystem OneSystem One models