Official news, first rumor reports and substantive progress. Each entry keeps the information published at that time.
Vercel published AI Gateway data showing that within two weeks of limited release, TypeSafe AI's Jev decision model was used by 35% of paid teams—nearly double the next model, Sonnet 5.5—and was the fastest first-two-week adoption Vercel has recorded. Jev is a lightweight classifier over a few predetermined outputs; Vercel itself replaced GPT-6 Luna with it for harmful-command classification. The same report says open-source models now account for more than 70% of gateway tokens and nearly 25% of spend, while frontier-lab spend has grown tenfold.
TypeSafe AI released Jev 1.14.0 under the jev-preview alias, describing small improvements across the board with the largest expected gain in multilingual support; jev-latest is set to move to 1.14 in about a week while jev-1.13.0 stays available. The same post opens opt-in danger-zone features: composable PNG/JPEG image input (also on 1.13), a new Box question type that returns one normalized bounding box per question (1.14 only), and a long-context header that raises limits to 262k tokens. TypeSafe says none of the three are production-ready yet; pricing stays $0.042 per million input tokens with free output.
A community release pairs Jeff-Qwen3.5-0.8B v1.2 with 9 LoRA adapters, positioning the 0.8B decision model in front of larger models like Qwen3.8-27B — the post claims 38x faster decisions with 8.7 points more accuracy for under 2 GB of extra memory. Third-party indexes corroborate the model's existence: the Jevland ecosystem index lists it as a local Jev alternative, and the HostYourAI catalog carries a Jeff/GLiFormer 400M variant used as an EU-hosted router.
The open-source vllm-jev engine cut System One decision inference from roughly 600ms to about 50ms, with official benchmarks commonly showing 5x or better.
MarkTechPost reports Jev, which skips text generation and returns typed decisions with calibrated probabilities, costs $0.042 per million input tokens with free output, and it verified 20 agentic use cases from model routing to tool-call gating.