jev is an insanely cool product Saw a post about jev and decided to check it out This thing is straight up gold whoever built it is a genius jev is the future Scanned over 700 live ads in 40seconds flat, and it cost me just 4 cents. If you're in marketing, this kind of crazy Show more
API & Models
Usage
The response field reporting input and output token counts for a request, used for cost tracking.
- Category
- API & Models
- Also known as
- —
- Related terms
- 4
- Directory entries
- 2
- Docs
- docs.typesafe.ai
- Added
- 2026-09-24
Definition
Every response includes usage with input_tokens and output_tokens. Since only input is billed, input_tokens is the number that maps to cost at the published per-billion rate.
The playground also surfaces usage next to probabilities, confidence, and latency, which is how thresholds get tuned against real cost per call.
Tagsapipricing
Related terms
Definitions that connect to this one.
Input tokensThe tokens billed on every request: state plus questions, including speculative questions your code ignores.API & ModelsOutput tokensThe tokens Jev emits for answers; they are reported in usage and are free of charge.API & ModelsToken pricingJev's published rate: $42 per billion input tokens, with output tokens free.API & ModelsPlaygroundThe browser workbench for pasting state and typed questions and inspecting answers, probabilities, confidence, latency, and usage.API & Models
From the directory
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
Browser playground in the TypeSafe console for trying System One: paste state, define typed questions, and inspect answers with probabilities, confidence, latency, and usage.
Cookbooks & DemosPlayground#official#playground#demos
Official
From the community
Posts from builders shipping with Jev right now.
700 live ads in 40 seconds
1,891 ads in 19 seconds
ESTA HERRAMIENTA ACABA DE ROMPER TODO EL MERCADO DEL AD SPY Maxfusion ha cogido JEV, el modelo nuevo de TypeSafe, y le ha metido la ad library entera de una marca → 1.891 anuncios clasificados → 19 segundos → 0,12 $ Y no es un resumen: cada anuncio etiquetado por etapa del Show more
JEV makes competitor research feel like a cheat code We fed it Resilia’s ad library and it classified 1,891 ads in 19 seconds for $0.12 Customer journey stage, ad style, and a full account deep dive Coming soon to the maxfusion MCP
Game levels generated in real time
Jev can generate game levels in real time. Faster and cheaper structured output could be a big deal for game dev!
900 images in 40 seconds
Made myself a little image classifier with OCR + Jev It was able to categorise ~900 images in 40 seconds Pretty cool
Intent-based search in Gmail
Jev is really good at intent-based search! How it looks in Gmail: (for a huge inbox you'd prob let semantic search / embeddings pull first but still much better experience)
@dabit3
Another crazy @typesafeai Jev example: Predictive spreadsheets Spreadsheets recalculate numbers, not meaning. Jev reads intent. Type "Urgency" at the top of a column and, as you type, it figures out you want each row rated from "no follow-up needed" to "urgent" in ~100 ms.
End-to-end tests run by agents
e2e + jev from @typesafeai ⚡ I'm building an open-source framework for running e2e tests with agents. supports web, mobile (and more!) available soon: tester.army/e2e