# GS1 decision model by BIGAI

> GS1 returns typed decisions in four open model sizes. Read its text-only results, request limits, precision policy and local inference routes.

Updated 2026-11-12 (Australia/Adelaide)

## Quick answers

### What is GS1 by BIGAI?

[GS1](<https://decisionmodels.ai/models/gs1>): A four-size family with Qwen3.5 hybrid backbones and native decision heads.

[GS1 facts](<https://decisionmodels.ai/models/gs1>)

[Source](<https://huggingface.co/bigai/GS1-2B>)

### Who makes GS1?

[GS1](<https://decisionmodels.ai/models/gs1>): BIGAI

[GS1 facts](<https://decisionmodels.ai/models/gs1>)

[Source](<https://huggingface.co/bigai/GS1-2B>)

By BIGAI · Hugging Face weight release: 2026-11-10 · OPEN

A four-size family with Qwen3.5 hybrid backbones and native decision heads. It scores supplied candidate meanings for Choice, Noul and Score questions without generating text. Published decision results are text-only; retained vision components do not establish image accuracy.

## Facts

- Sizes: 0.8B, 2B, 4B and 9B releases; the 2B card lists 2,319,227,200 stored parameters
- Runtime: Custom Transformers code with AutoModel and trust\_remote\_code, or the [GS1](<https://decisionmodels.ai/models/gs1>) HTTP server
- Context: Configured branch limits: 65,536 tokens for 0.8B/2B/4B and 32,768 for 9B; default HTTP service limit is 4,096
- Calibration: Released configurations use identity calibration; task-specific confidence still needs validation
- Licence: Apache-2.0 code and weights; LICENSE and NOTICE included

## Claims and sources

- **VENDOR-REPORTED**: The maker reports GS1-2B scoring 62.22 on public Decision Index 0.3 across 37 benchmarks, and 80.09% on 231 public [JevBench](<https://decisionmodels.ai/jevbench>) decisions. Public task accuracy is separate from the sealed composite. [source](<https://huggingface.co/bigai/GS1-2B>)
- **VENDOR-REPORTED**: The maker reports GS1-2B warm in-process CUDA Graph p50 18.64 ms on an RTX 4090 reporting 48 GiB, using one question and a 256-token longest branch. Loading, graph capture, HTTP and SDK transport are excluded. [source](<https://huggingface.co/bigai/GS1-2B>)

## Links

- [Source: 2B card and code](<https://huggingface.co/bigai/GS1-2B>)
- [Source: 0.8B package](<https://huggingface.co/bigai/GS1-0.8B>)
- [Source: 4B package](<https://huggingface.co/bigai/GS1-4B>)
- [Source: 9B package](<https://huggingface.co/bigai/GS1-9B>)
- [Source: 9B request limits](<https://huggingface.co/bigai/GS1-9B/blob/main/config.json>)
- [Source: Licence](<https://huggingface.co/bigai/GS1-2B/blob/main/LICENSE>)

## Related projects

No related projects are listed in the registry.