Bespoke Labs launches Nimble-v4 decision models, topping the Decision Index
gregd_nlp · x · 2026-10-14
Bespoke Labs announced Nimble-v4 (9B) and Nimble-v4-max (27B), "decision models" that convert text into calibrated probability outputs for routing, tagging, fact-checking, and coding decisions.
- Nimble-v4-max scores 68.46 on the Decision Index public suite (+10.50 over Jev 1.13 at 57.96); Nimble-v4 scores 63.70, #1 among models under 25B
- Internal evals: 43% fewer mistakes than Jev, +50pp on model routing decisions
- API returns a probability for every allowed answer so code can auto-act on confident calls and escalate close ones
- Both models share one API and request format, available via Bespoke's hosted API
It's another sign of model specialization: small models built purely for structured decisions rather than general generation.
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