Jev model guides.
From your first decision to a production workflow. Guides link to original technical sources. Translation availability varies by article.
Developers
Structured Decision Models for Autonomous Agents
Design bounded agent decisions with Choice, Score and Noul. Compare hosted Jev and visual Valen, connect Codex, and evaluate errors, latency and cost.
How to classify text with the JevModel API
Classify text into your own labels with a Choice request. See the input, illustrative response, error handling and human-review path.
Jev probability, confidence and human-review thresholds
Understand Choice confidence, Noul probability and Score rubrics. Evaluate thresholds on labeled data before automating a decision.
Cloudflare Clef and Clef-flash: a practical integration guide
Learn how Cloudflare Clef takes typed questions, where to call its API, and what to validate before using its answers in an agent or review workflow.
Use Jev in Codex with the Official TypeSafe Skill
Install the official TypeSafe skill in Codex, configure TYPESAFE_API_KEY, and ask Jev to select a next action with a verified API call.
JevModel API: request and response
Use a JevModel API key to send typed Jev questions to /api/v1/systemone.
Choice, Score, and Noul
Pick the answer type that matches the decision your code will make.
Evaluate a Jev workflow
Test labels, uncertainty, and real outcomes before automation.
Ways to access Jev
Choose a provider path and keep credentials on your server.
Batch text classification with the JevModel API
Classify CSV or JSONL rows with Jev Choice questions. Reuse the normal API, preserve row IDs and export results without inventing a batch endpoint.
Compare
Valen vs Jev in 2026: Which Decision Model Fits Your Agent?
Compare Valen and Jev for agent decisions: visual inputs, open weights, published Sokoban benchmarks, self-hosting steps and the limits of each approach.
Jev vs embeddings and zero-shot classifiers
Compare typed decisions, vector similarity and zero-shot label scoring for text classification. Choose using your own data and deployment constraints.
Clef vs Jev: choosing a decision model for your workflow
Compare Cloudflare Clef with hosted Jev by input needs, API boundaries and deployment. Use a task-specific evaluation before changing your decision layer.
Strands Decider 2B: what it does and how to compare it with Jev
Understand AWS Strands Labs’ experimental open decision model, checkpoint versions, local serving and a practical Jev evaluation plan.
OpenAI Decisions API vs Jev: contracts, costs and migration
Compare OpenAI’s public-beta Decisions API with Jev: predicate, choice and score outputs, JSON shapes, refusal handling and a migration checklist.
Jev vs GPT and Claude: choosing a decision layer
Compare Jev typed probabilities with GPT and Claude structured outputs. Choose routing, generation or a hybrid workflow using your own test cases.
Jev or rules?
Decide when a model helps and when ordinary code is enough.
Is Jev open source?
Separate the hosted Jev model from independent open alternatives.
What is Laya?
An open decision model with a Jev-shaped task, from a different team.
Jev vs Laya
Hosted Jev access and open local deployment solve different constraints.
Jev vs OpenJev
API familiarity is useful, but runtime and model behavior still differ.
Jev vs djev
Compare text decisions with a DiffusionGemma-based multimodal approach.
SemIf vs Jev: Benchmarks, Calibration, and Deployment
Compare SemIf vs Jev using primary sources: option scoring, benchmark limits, CPU and GPU deployment, calibration, and a practical workflow evaluation plan.
Jev vs Jev-Omni: text and multimodal decisions
Jev-Omni is an independent 12B model for text, image, audio, and video decisions. Compare its inputs and hardware needs with hosted Jev.
Start here
What is JevModel, and how is it related to Jev?
JevModel is an independent hosted Jev playground and API for text decisions, with visual flows and browser batch processing. TypeSafe AI develops Jev.
What is the Jev model?
Understand TypeSafe AI’s Jev decision model, its Choice, Score and Noul outputs, and when to use it.
Your first Jev decision
Try a support-routing example, read its Choice probabilities, and find your next steps for the JevModel API.
JevModel pricing and free Jev runs
Understand verified daily Jev runs, Flow usage, input-token billing and service packs. Choose a plan after measuring your own workload.
Workflows
Where typed decisions help
Five starter workflows, from support routing to agent control.
Route customer support with Jev
Classify a message and decide when a person should take over.
Use Jev for review queues
Triage posts for review without treating a probability as a final verdict.
Score leads on a useful rubric
Make sales prioritization easier to test and revise.
Check a claim against evidence
Use a narrow proposition to spot unsupported statements.
AI Decision Flows with Jev and human review
Build a Jev decision flow for support routing, add an uncertain-answer branch and call the saved graph through the API. Learn limits and billing.