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Jev AI Reaches 35% of Paid Teams in 14 Days, Uses Just 0.15% of Inference Spend: Vercel Report

TypeSafe AI’s decision-focused model Jev reached 35.3% of paid teams on Vercel AI Gateway within its first 14 days, setting a record for adoption. The model also recorded a 55.6% week-two return rate, while its share of inference spending remained small, according to Vercel’s October 2026 AI Gateway Production Index.
Jev AI logo alongside a rising line graph illustrating the model's rapid adoption.
October 19, 2026 12:58 PM IST | Written by Vaibhav Jha

Jev AI, TypeSafe AI’s first “System One” model, has quickly risen the charts to become the fastest-adopted AI model in AI Gateway history, reaching 35% of paid teams in its first 14 days of its launch, according to a latest report by Vercel.

The AI Gateway Production Index — October 2026 by Vercel states that not only was Jev AI the fastest adopted model, it also received the most requests of any model in September despite its public launch only on September 21. An AI gateway is a specialized middleware platform that act as bridge between AI systems and end-user applications, centralizing the deployment and governance of AI models.

Graphic illustrating Jev AI's rapid adoption after launch. Vercel reported that the TypeSafe AI model reached 35.3% of paid teams in its first 14 days.
Jev AI adoption on Vercel AI Gateway

The artificial intelligence index report also stated that of the teams that tried Jev in week one, 55.6% returned in week two, the fifth-highest retention rate.

“Jev is a decision model. Compared with typical language-model requests, a Jev request is faster, cheaper and uses a fraction of the tokens. So although its adoption was fast and broad, it accounted for just 1% of the month’s tokens and 0.15% of spend. In September, Jev quickly became a popular model for production while remaining a tiny part of the inference bill,” read an excerpt from Vercel report.

 

In their September full scorecard, Vercel has ranked Jev at 6th position below Claude Sonnet 5.5 , Gemini 3.8 Flash, Claude Opus 5.5, GPT-6 Luna and DeepSeek-V4.1-Flash on the parameters of reach, spend share and retention.

Jev, a decision-based AI model by TypeSafe AI Labs, is unlike conventional LLMs as it does not generate free-form text, instead, when developers send it context and short, typed questions, it returns probabilities and confidence scores, allowing software to use jev engineering for coding agents directly.

TypeSafe AI claims Jev can return decisions in 70 to 500 milliseconds and costs $0.042 per million input tokens, while output tokens remain free. The AI model uses parallel sampling and a new training method RLCD to take unstructured information and return decisions with probabilities and confidence scores.

When it comes to top SAAS vendors, TypeSafe AI also reported breakout growth compared to its size in the first week of October according to a report by Ramp Economics Lab.

TypeSafe AI, a San Francisco based AI Lab, announced its exit from stealth mode through its co-founder Diogo Almeida, former OpenAI researcher, on September 15 with the launch of Jev AI model and launched it for public on September 21. In barely two days after its launch, TypeSafe AI suspended new registrations for Jev after witnessing a surge in demand. Registrations were reinstated later.

Recently, TypeSafe AI launched Jev 1.14 alias Jev Preview, an upgraded version of their flagship model that allows users to upload images in their queries and introduced ‘Box’ System One Question Type and longer context up to 262K tokens.

Also Read: TypeSafe AI Launches Jev 1.14 with Image Request, Box Type, Longer Context and ‘Danger Zone Warning’

Author

  • Vaibhav Jha, editor and co-founder at AI FrontPage

    Vaibhav Jha is an Editor and Co-founder of AI FrontPage. In his decade long career in journalism, Vaibhav has reported for publications including The Indian Express, Hindustan Times, and The New York Times, covering the intersection of technology, policy, and society. Outside work, he’s usually trying to persuade people to watch Anurag Kashyap films.

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