Laya

An open-weight, self-hostable typed-decision model positioned as the open-source alternative to TypeSafe AI's Jev.

Convai Innovations · Open-weight/community models · model

Published in Feed

Overview

Laya, released September 18, 2026 under Apache 2.0, is a 421-million-parameter decision model from Convai Innovations built on a ModernBERT-large backbone with a from-scratch decision head (2 transformer layers, an option-marker scorer, and an act/escalate head). It answers typed questions (choice, score, boolean) with calibrated probabilities instead of generating text, positioned as the open-weight, self-hostable counterpart to TypeSafe AI's managed Jev service, which launched three days earlier. On Convai's typed-decisions benchmark, Laya scores 0.766 accuracy and 0.081 ECE calibration error versus Jev's 0.727 accuracy and 0.246 ECE, and responds in 32.8ms on a T4 GPU versus Jev's 236-276ms, though it falls behind Jev on high-cardinality questions (50+ options): 0.425 versus Jev's 0.870 on a 72-label test.

This is a sourced directory entry. Features and capabilities are reported in the linked sources; this entry does not document independent Aymorphic testing.

Key features

  • 421M parameters, ModernBERT-large backbone plus a from-scratch decision head, Apache 2.0 licensed
  • 32.8ms response time on a T4 GPU, about 7.8x faster than Jev's 236-276ms
  • Higher accuracy (0.766 vs 0.727) and calibration (0.081 vs 0.246 ECE) than Jev on typed-decision benchmarks
  • Multilingual variant (laya-multilingual, mmBERT-base) covers 100+ languages; English checkpoint covers 23 with routing to 45+
  • Runs in-browser via Hugging Face Spaces demo, via `pip install laya`, or self-hosted with an HTTP server compatible with existing TypeSafe clients

Use cases

  • Self-hosted routing, classification, and scoring where data cannot leave the local environment
  • Fine-tuning or pinning a specific decision-model version for private data
  • Low-latency typed decisions in-browser with no server or API key
  • Drop-in replacement for TypeSafe Jev clients via a compatible HTTP server

Pricing

Free and open source (Apache 2.0); no API pricing, self-hosted deployment costs only your own compute.

Pricing reflects the source record and may change. Confirm current terms with the provider.

Dates and sources

Released
18 Sept 2026
Record updated
23 Sept 2026
Record last checked
23 Sept 2026

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