Jev, a probabilistic decision model built by TypeSafe AI, reached approximately 13% of Vercel’s paid AI Gateway teams within 24 hours of its September 15, 2026 launch. This adoption rate outpaced every other model tracked by the platform, including GPT-5.6 and Fable 5.1, which remained below 7% at the same milestone. Vercel’s AI Gateway Index, published October 15, 2026, confirmed Jev as the fastest-adopted and most requested model for September. The model charges no output-token fees since it generates no text, with input costs around $0.04 to $0.042 per million tokens. TypeSafe announced a $40 million seed round led by DCVC on launch day, and Jev was integrated into Cloudflare and LangChain within three days.
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