Bespoke-Nimble-9B

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Bespoke-Nimble-9B

Update (September 24, 2026): Updated to our latest 9B checkpoint, with an 8,192-token context limit and up to 255 choices per field. This release uses T=1.0; the earlier checkpoint remains available at revision="original-2676", and v2 is unchanged.

A Qwen3.5-9B LoRA adapter for context-grounded choices, booleans, and rubric score levels. It scores the allowed answer tokens directly; the evaluated workflow does not generate reasoning or free-form answers.

This repository contains the adapter (about 165 MiB), tokenizer, exact prompt builder, reference inference code, and release metadata. It requires the Qwen3.5-9B base checkpoint. The full base weights are not duplicated here.

License: Apache 2.0.

More info: https://github.com/bespokelabsai/nimble

Loading and scoring

Use a CUDA GPU with BF16 support. The original run used PyTorch 2.8.0 with CUDA 12.8. Install an appropriate CUDA build of PyTorch, then the remaining pinned requirements. The helper processes fields individually and preserves the training prompt and probability calculation.

hf download bespokelabs/Bespoke-Nimble-9B --local-dir nimble-model
pip install -r nimble-model/requirements.txt

Authenticate with a Hugging Face token that can read this repository if it is private. Review the included helper before importing it; no trust_remote_code=True is required.

import sys
sys.path.insert(0, "nimble-model")
from inference import NimbleModel

model = NimbleModel("nimble-model")
result = model.score(
    context="The store accepts returns within 30 days. This item was bought 12 days ago.",
    schema={
        "eligible": {
            "type": "boolean",
            "description": "Is this item within the store return window?"
        }
    },
)
print(result["output"])
print(result["fields"]["eligible"]["probabilities"])

For choices, use type="enum", a choices list of strings, a description, and optional choice_descriptions. For rubric scores, use integer-valued enum strings such as ["0", "1", "2"], describe each level, and pass that field name in score_fields=["quality"]. This returns the selected integer and its probability-weighted expected score. Each field supports at most 255 choices. Prompts exceeding 8,192 tokens are rejected rather than truncated.

The included scorer applies softmax(candidate_logits / temperature) once, with a default of T=1.0. This checkpoint has not had a separate temperature fit; do not reuse the older model’s 2.179 calibration. For Mac/MLX and Linux loaders, use the current GitHub quickstart.