I built a browser extension with Jev @typesafeai that can hide/collapse posts on X based on natural language. It's so fast that it's not noticeable and insanely cheap...this must be the future of "ad blockers" and content firewalls.
Primitives
Question ID
The key you choose for a question; answers come back under the same key, and the ID is never sent to the model.
- Category
- Primitives
- Also known as
- —
- Related terms
- 4
- Directory entries
- 2
- Docs
- docs.typesafe.ai
- Added
- 2026-09-24
Definition
Every question in the questions map is named by an ID you pick, such as refund_requested. The matching answer is returned under the same ID, which makes responses easy to index in code.
Because IDs are not sent to the model, a self-explanatory ID is not a substitute for a complete instruction. Write the full question in instructions even when the key seems obvious.
Tagsprimitivesapi
Related terms
Definitions that connect to this one.
QuestionA named judgment for Jev to make about the state, defined by an ID, a type, instructions, and criteria for the typed primitives.Core ConceptsInstructionsThe field that states what a question should judge; accepts a string, an object, or an array for extra structure.PrimitivesAnswerThe structured result returned under a question's ID: a choice, a score, or a probability of yes, plus distributions and confidence.Core ConceptsSystem One endpointThe single HTTP endpoint that evaluates a state against typed questions: POST https://api.typesafe.ai/v1/systemone.API & Models
From the directory
The three TypeSafe question types, the typed answers they return, how to choose between them, and how to ask several in a single call.
Practices & PatternsDocs#official#primitives#choice
Official
The raw HTTP contract behind every SDK: POST a state plus typed noul, choice, and score questions to /v1/systemone, and get one answer per question, with error codes and retry guidance.
Sites & GuidesDocs#official#docs#api
Official
From the community
Posts from builders shipping with Jev right now.
Hide posts on X in plain language
$10,000 in Jev’s hands
I gave Jev $10,000 and let it trade
@CompleteSkeptic
After co-inventing ChatGPT, I kept asking myself: why have superhuman chat models not led to AGI? I’ve spent the last 2 years in stealth building a new way to train models (RLCD), and a new type of frontier AI model that we are releasing today: Jev • 20-200x faster • 40-400x
Jev plays Slay the Spire 2
昨天出的 typesafe.ai Jev 模型 适合高频决策，那岂不又是适合打游戏？ 之前用 GPT-6 Astra 代打杀戮尖塔2 能力强但速度慢。 我刚实测用 Jev 打，行动思考只需 0.7秒， 画面我都没看清它就操作完了。 这超人类游戏速度， 着实又让我震惊瘫坐了😅 语言很难描述这感觉，看视频⬇️
@CompleteSkeptic
After co-inventing ChatGPT, I kept asking myself: why have superhuman chat models not led to AGI? I’ve spent the last 2 years in stealth building a new way to train models (RLCD), and a new type of frontier AI model that we are releasing today: Jev • 20-200x faster • 40-400x
An agent with a Jev model router
Building an agent with model router powered by Jev.
Fraud detection with Jev and Kimi K3
Jev + Kimi K3 for fraud detection! TLDR: Jev classified 100 emails in 1.42 seconds, then I routed the uncertain cases to Kimi K3. The full pipeline got 96/100 correct for only ~$0.07. Video is not sped up, check out the live run! Here was my process: I gave Jev 100 emails to Show more
Jev Detector scans ~10,000 words for slop in ~2 s
Announcing Jev Detector The world's fastest AI slop detector, built on jev from @typesafeai ~10,000 words scanned for slop in ~2 seconds Best part, its free, no sign up required, enjoy! jevdetector.com