TypeSafe Jev
Jev is TypeSafe's System One decision model, built for the small decisions inside software and agents. You send a state and typed questions (choice, score and more) and get typed answers with probabilities back instead of free-form text, so code can branch on them directly to route, classify, score or rank options. Agents can use it to settle narrow calls cheaply and save the larger LLM for open-ended work. Available through TypeSafe's API, Python and JavaScript SDKs, an agent skill, and OpenRouter.
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About TypeSafe Jev
TypeSafe Jev is listed in our agent infra category and is aimed at builders. Jev is TypeSafe's System One decision model, built for the small decisions inside software and agents. You send a state and typed questions (choice, score and more) and get typed answers with probabilities back instead of free-form text, so code can branch on them directly to route, classify, score or rank options. Agents can use it to settle narrow calls cheaply and save the larger LLM for open-ended work. Available through TypeSafe's API, Python and JavaScript SDKs, an agent skill, and OpenRouter. Pricing, as the maker states it: Usage-based: pay per input token, output free; Jev 1.14 listed at $0.042 per million input tokens in TypeSafe docs; also on OpenRouter; enterprise plans via sales. Maturity: Active. We last checked the official link on 2026-10-20.
TypeSafe Jev at a glance
- Category: Agent infra
- Built for: Developers and teams building with AI agents
- Pricing: Usage-based: pay per input token, output free; Jev 1.14 listed at $0.042 per million input tokens in TypeSafe docs; also on OpenRouter; enterprise plans via sales (as the maker states it)
- Official site: typesafe.ai
- Listed on AgentScout: Oct 20, 2026
TypeSafe Jev FAQ
What is TypeSafe Jev?
Jev is TypeSafe's System One decision model, built for the small decisions inside software and agents. You send a state and typed questions (choice, score and more) and get typed answers with probabilities back instead of free-form text, so code can branch on them directly to route, classify, score or rank options. Agents can use it to settle narrow calls cheaply and save the larger LLM for open-ended work. Available through TypeSafe's API, Python and JavaScript SDKs, an agent skill, and OpenRouter.
How much does TypeSafe Jev cost?
TypeSafe Jev's pricing, as the maker states it: Usage-based: pay per input token, output free; Jev 1.14 listed at $0.042 per million input tokens in TypeSafe docs; also on OpenRouter; enterprise plans via sales. Check the official site for current plans.
What are alternatives to TypeSafe Jev?
Similar tools include Manifest, Weave Router, Agent Tincan, Grok Bot Jev Router, Portkey AI Gateway and LiteLLM.
Facts from our link-checked listing and the official site. See something wrong? Suggest an edit.
TypeSafe Jev ratings and reviews
TypeSafe Jev alternatives
Other agent infra tools in our directory. See all agent infra tools →
Manifest
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Weave Router
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Agent Tincan
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Grok Bot Jev Router
Grok Bot Jev Router is an open-source Python reference router that puts TypeSafe Jev in front of Grok Bot as a cheap decision layer. Before expensive research, browser, retry or subagent work, Jev classifies the request and returns an explicit action such as reuse a cached result, stop a failing retry, cap research, run a deterministic step, or ask a human. It starts in shadow mode that only logs decisions, has an active mode for a Grok Bot skill that honors them, and includes a kill switch. It never sends, pays or deletes anything itself.
Portkey AI Gateway
Fast open-source AI gateway that routes requests to hundreds of LLMs through one API with fallbacks, load balancing and built-in guardrails.
LiteLLM
Open-source AI gateway and Python SDK that calls 100+ LLM providers in the OpenAI format, with cost tracking, guardrails, load balancing and logging.
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