Eikos-27B

caiovicentino1Decision modelOpen weights

Eikos-27B by caiovicentino1 is a decision model: it answers typed questions with a probability for each allowed answer instead of generating text. It scores 55.3 on the Jev Decision Index (rank 34).

Pricing

No hosted price is listed. The weights are open: the cost is your own compute.

Specifications

Provider: caiovicentino1
Parameters: 28B
Released: Sep 2026
Open weights: Yes
Question types: Choice (one of N options), Score (ordered rubric), Yes / no
Mechanism: Decoder LM with a decision readout
Backbone: Qwen/Qwen3.8-27B
Jev-compatible request: Yes
Runs on CPU: No
License: mit
Hugging Face: caiovicentino1/Eikos-27B

Benchmarks

Jev Decision IndexECE 0.057: 55.3
Benchmark Heaven JevBench (Capability): 77.2
Enterprise Decision Arena (provisional): 82.5

Jev Decision Index: public 52.9, ECE 0.057, Brier 0.401. Lower ECE means its probabilities can be taken at face value.

Self-reported by the publisher

The model's own claims, often on its own sets or a self-run copy of a public suite. Not independently verified and never ranked alongside measured results.

Jev Decision Index public suite (self-run)Self-reportedDecision Index public balanced skill, edition 0.2.1 kit (release-v2.1), self-run: 55.5

Speed & latency

Median latency per call (Decision Index)

130 ms

Compare Eikos-27B with…

Eikos-27B vs amos-1-large—/1M in Eikos-27B vs amos-1-medium—/1M in Eikos-27B vs Celeris-1 Decision$0.04/1M in Eikos-27B vs ScaleDown Classify-1$0.04/1M in Eikos-27B vs Cloudflare clef—/1M in Eikos-27B vs Cloudflare clef-flash—/1M in

FAQ

How much does Eikos-27B cost?

Eikos-27B has no hosted price listed; its weights are open, so the cost is the compute you run it on.

What questions can Eikos-27B answer?

Eikos-27B answers choice (one of n options), score (ordered rubric), yes / no questions, returning a probability for each allowed answer.

Is Eikos-27B well calibrated?

On the Jev Decision Index its expected calibration error (ECE) is 0.057; below about 0.05, a stated 80% confidence is right roughly 80% of the time.

Is Eikos-27B open weight, and can it run on a CPU?

Yes, Eikos-27B has open weights. It needs a GPU to run at useful speed.

Data as of 2026-10-14. Source: Metatext decision-model catalogue, 2026-10-14 (Jev Decision Index, Enterprise Decision Arena, Benchmark Heaven JevBench, Hugging Face). Pricing is per 1M tokens (USD); confirm with the provider before production use.