Laya

Convai Innovations published three open-weight "System 1" decision models, grouped as Laya, on 18 and 19 September 2026 under Apache 2.0. None writes text. The input is a state, such as an email, a ticket or a block of JSON, together with typed questions, and the output for each question is a choice, a score or a probability, produced in one forward pass. That puts it alongside other small decision models here as other small decision models in this directory, including Jev from TypeSafe and CUA-S1-FORMS from Cua.

The three checkpoints

In the English checkpoint, a ModernBERT-large encoder feeds a compact decision head that was trained from scratch; the total is 421 million parameters, with 512 tokens available for each question. The multilingual checkpoint swaps in an mmBERT-base encoder, giving 322 million parameters and 1,024 tokens. A third checkpoint is tuned for four typed-decision workflows. The authors train with a method they name RLCD, reinforcement learning against strictly proper scoring rules, designed so that stating honest probabilities is the only way to earn reward.

Speed, as the authors measured it

On a Tesla T4 the authors measure around 39.5 milliseconds per question for the English checkpoint and 32.8 for the multilingual one, dropping to 7.2 milliseconds per question when ten are batched. No benchmark score is stored for them, and the headline comparison with Jev blends the authors' own measurements with third-party Jev figures taken on different prompts and sample sizes, which the model card itself says.

Where the model card shows it fails

The release earns attention for something most vendors omit. By the card's own account, the English checkpoint breaks down on non-Latin scripts and yet stays sure of itself, scoring zero accuracy with very high confidence on Khmer, which means a confidence gate will not catch the failure. The multilingual checkpoint is shipped uncalibrated and is consistently over-confident, so a buyer should refit its temperature on their own data before trusting the probabilities. For this reason a router selects the checkpoint from the script of the input ahead of the forward pass.

Running it

There is no hosted API and no price: Laya runs on the buyer's own hardware. The company says the underlying research goes back to March 2025; the date used in this entry is the one on which the downloadable checkpoints first appeared.