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  4. TypeSafe AI Launches Jev Probability Model for Fast Non-Hallucinating Agent Workflows
Tools & releases

TypeSafe AI Launches Jev Probability Model for Fast Non-Hallucinating Agent Workflows

TypeSafe AI, founded by former OpenAI researcher and RLHF co-inventor Almeida, launched Jev, a non-generative transformer that outputs calibrated probability scores instead of natural language. Jev's output tokens are free and input tokens are metered per billion; at Vercel, replacing ChatGPT Luna 5.6 with Jev made a command-safety classifier 5 to 18 times faster and more accurate.

September 19, 2026· 2 min read
OKCurated by Oleksandr Kuzmenko, AI Product Engineer·Updated September 19, 2026·Sources cited on every story
AI-assisted · editor-reviewed·How we use AI
TypeSafe AI Launches Jev Probability Model for Fast Non-Hallucinating Agent Workflows

Why it matters

TypeSafe AI, founded by former OpenAI researcher and RLHF co-inventor Almeida, launched Jev, a non-generative transformer that outputs calibrated probability scores instead of natural language. Jev's output tokens are free and input tokens are metered per billion; at Vercel, replacing ChatGPT Luna 5.6 with Jev made a command-safety classifier 5 to 18 times faster and more accurate.

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