Jeff-1.0-Large
Data: JevBench v1.6.40, published 2026-10-22
Capability 81.5 · rank #5 of 139 on the open-weights board
Last measured: 2026-10-09 · measurement release: v1.6.2
Licence not stated
intelligence
71.9
calibration
91.1
speed
88.8
cost
49.2
Composite (secondary)
68.6 · Composite rank #14
Cost and measurement conditions
$0.049 per 1,000 decisions (estimated)
Public exact base-model OpenRouter reference for google/gemma-4-31b-it, 2026-10-09: cheapest paid DeepInfra Turbo $0.09/M input, $0.34/M output. Jeff uses native bf16 single forward-pass decision readout with zero generated output tokens. Reference tariff is not an actual Jeff hosting bill. Primary source https://openrouter.ai/api/v1/models/google/gemma-4-31b-it/endpoints; source receipt retained.
Measured p50 latency: 0.080 s (on-GPU, no network, loopback; not directly comparable with API latency, which we time end to end from our measuring host, network included)
Ranking and cap use: 0.31 s (est. incl. network (2x + 150 ms))
Self-hosted model: measured p50 0.080 s on-GPU, no network (timed on our GPU over loopback). Not directly comparable with API latency, which we time end to end from our measuring host, network included. The ranking and latency cap use the same estimate for every self-hosted row: 2 × measured + 150 ms = 0.31 s. Model authors can ask us to time a hosted endpoint instead (on request).
x2 + 0.15 s (assumption, not measured)
Setup not stated