---
license: apache-2.0
base_model: frontier-infra/jebadiah-27b
base_model_relation: quantized
library_name: gguf
language:
- en
tags:
- gguf
- llama.cpp
- decision-model
- system-one
- typed-decisions
- calibrated-probabilities
- ainode
---

# Jebadiah 27B GGUF

GGUF builds of [Jebadiah 27B](https://huggingface.co/frontier-infra/jebadiah-27b) for [llama.cpp](https://github.com/ggml-org/llama.cpp), which runs on NVIDIA, AMD and
Apple GPUs and on plain CPUs. Jebadiah answers a typed question (choice, noul or score) with a probability for
every option, read from one forward pass. Nothing is generated. Code, trainer and evals:
[getainode/jebadiah](https://github.com/getainode/jebadiah).

**Results and docs**

- Project site, with every result and how to run the models: [jebadiah.ai](https://jebadiah.ai).
- [Decision Index 0.2.1](https://huggingface.co/spaces/multimodalart/jev-decision-index): Jebadiah 27B scores 54.67, #5 of 67 open models (as of 2026-09-26). This is the board's own number; the maintainer validated my run and put it on the leaderboard. [Run record](https://huggingface.co/datasets/frontier-infra/jebadiah-decision-index-results/tree/main/runs/jebadiah-27b-1c0d794f).
- JevBench v1.4.2: on its 231 public items, run through its own harness, Jebadiah 27B scores 0.866, the same as Jev 1.13.0. This is my own run on the public items, not the official board, which also uses sealed items. [Details and caveats](https://github.com/getainode/jebadiah#where-we-stand-on-jevbench).
- All sizes: the [Hugging Face collection](https://huggingface.co/collections/frontier-infra/jebadiah-open-system-one-decision-models-6ab80765ddd3fa0b3eba5213), mirrored on [ModelScope](https://www.modelscope.ai/profile/JasonBrashear).

**Which one should I use?** For local use, start with [Jebadiah 9B v2 GGUF](https://huggingface.co/frontier-infra/jebadiah-9b-v2-GGUF). On Apple silicon, use an MLX build: [27B](https://huggingface.co/frontier-infra/jebadiah-27b-MLX), [9B v2](https://huggingface.co/frontier-infra/jebadiah-9b-v2-MLX) or [4B v2](https://huggingface.co/frontier-infra/jebadiah-4b-v2-MLX). For vLLM or fine-tuning, use the full weights: [27B](https://huggingface.co/frontier-infra/jebadiah-27b), [9B v2](https://huggingface.co/frontier-infra/jebadiah-9b-v2) or [4B v2](https://huggingface.co/frontier-infra/jebadiah-4b-v2). Setup for every runtime, and for JDE: [Run Jeb locally](https://github.com/getainode/jebadiah/blob/main/docs/run-locally.md).

## Files

Every file was checked on the 260 held-out questions the merged weights were checked on, and compared with
the merged bf16 weights and with the training run's own eval records.

| File | Size | Same answer as bf16 | Same as the run | choice + noul | score | Prob. diff median / max |
|---|---:|---:|---:|---:|---:|---:|
| `jebadiah-27b-Q8_0.gguf` | 29.0 GB | **260 / 260** | 259 / 260 | 173 / 173 | 86 / 87 | 0.002 / 0.025 |
| `jebadiah-27b-Q5_K_M.gguf` | 19.5 GB | **255 / 260** | 256 / 260 | 172 / 173 | 84 / 87 | 0.007 / 0.060 |
| `jebadiah-27b-Q4_K_M.gguf` | 16.8 GB | **258 / 260** | 259 / 260 | 172 / 173 | 87 / 87 | 0.013 / 0.127 |
| *bf16 weights* | 55.6 GB | | 259 / 260 | 173 / 173 | 86 / 87 | 0.002 / 0.019 |

Which one: `Q8_0` if it fits (it changed no answer here); `Q4_K_M` when memory is short. A file
needs about its own size in GPU or unified memory, plus about 1 GB for a 4k context.

## Run it

The answer is the log probability of each option label ("A", "B", ...) at the answer position, which
llama-server's `/completion` returns. The script renders the prompt exactly as AINode does, sends the raw
text (so the server's own chat template is never used), renormalises over the labels and applies
`temperatures.json` (choice 1.2321, noul 1.297, score 0.7558). You need a llama.cpp that knows the `qwen35` architecture: we checked
v0.5.0 (older builds refuse the file).

```bash
hf download frontier-infra/jebadiah-27b-GGUF --include "*Q8_0.gguf" --include "scripts/*" --include "*.json" --include "*.jinja" --include "*.txt" --local-dir jebadiah-27b-GGUF
cd jebadiah-27b-GGUF
llama-server -m jebadiah-27b-Q8_0.gguf -c 4096 -np 1 --port 8080
pip install transformers        # the tokenizer only, no torch
python scripts/decide_gguf.py --server http://127.0.0.1:8080 --request scripts/example-request.json
```

`--no-temperatures` returns the raw probabilities. For Ollama and LM Studio, see the next sections.

On `example-request.json` (jebadiah-27b-Q8_0.gguf):

```json
{
 "route": {"type": "choice", "choice": "billing", "confidence": 0.647004, "probabilities": {"billing": 0.764669, "support": 0.034001, "sales": 0.20133}},
 "urgent": {"type": "noul", "noul": 0.209376}
}
```

## Use it in Ollama

```bash
pip install jebadiah-decide
jeb doctor --size 27b         # pulls hf.co/frontier-infra/jebadiah-27b-GGUF:Q8_0 into Ollama the first time, checks it, answers the example
jeb serve --size 27b          # POST http://localhost:8100/v1/systemone
```

`jeb serve` renders the prompt, calls Ollama raw with thinking off, reads the label probabilities and applies
`temperatures.json`; it serves AINode's `/v1/systemone` and `/v1/decide` on localhost for JDE or your code.
Don't use `ollama run` or the chat window: Jeb isn't a chat model, and what it writes there is nonsense by
design. Tested with Ollama 0.34.4: 260 of 260 answers the same as bf16, and the same
answer as llama-server on all 260. At most 20 options per question. `scripts/decide_ollama.py` does the same
for one request file. Every runtime, step by step: [Run Jeb locally](https://github.com/getainode/jebadiah/blob/main/docs/run-locally.md).

## Use it in LM Studio

Jeb works in LM Studio through its local server, not the chat window: chat runs with thinking on and shows
text, while a decision needs the probability of every option label. `scripts/decide_lmstudio.py` takes the same
arguments and prints the same output as `decide_gguf.py`. It sends AINode's messages to LM Studio's
`/v1/chat/completions` with thinking off (`"reasoning_effort": "none"`), where LM Studio renders the same prompt
text the llama-server path sends, and reads the option labels from the top log probabilities that come back. It
stops with an error if LM Studio's prompt length differs from the local tokenizer's.

1. In LM Studio, search for `jebadiah-27b` and download `jebadiah-27b-Q8_0.gguf` from this repository.
2. Open the **Developer** tab, start the server and load the model. Note the identifier LM Studio shows for it
   (for example `jebadiah-27b`).
3. In a terminal:

```bash
hf download frontier-infra/jebadiah-27b-GGUF --include "scripts/*" --include "*.json" --include "*.jinja" --include "*.txt" --local-dir jebadiah-27b-GGUF
pip install transformers        # the tokenizer only, no torch
python jebadiah-27b-GGUF/scripts/decide_lmstudio.py --model jebadiah-27b --request jebadiah-27b-GGUF/scripts/example-request.json
```

If **Require Authentication** is on in LM Studio's server settings, create a token there and
`export LM_API_TOKEN=...` first.

Tested on the 9B only: LM Studio 0.4.21 with `jebadiah-9b-v2-Q8_0`, 257 of 260 answers the same as bf16, and the
same answer as llama-server on the same file on 260 of 260. This 27B build uses the same script and the same prompt, but it has not been run in LM Studio.

**At most 20 options per question.** LM Studio returns only the top 20 log probabilities, the same cap AINode's own
route has. On the 77-option Banking77 questions the pick was still right, but the probabilities moved by up to
0.16, so do not rely on them past 20 options.

**If LM Studio shows a "Vision" tag, ignore it.** Some GGUF repositories, including third-party quants of Jeb, ship a vision file (mmproj) from the Qwen base, and LM Studio labels the model Vision because of it. Jeb was not trained on images, and it does not make decisions in the chat window. It decides only through `decide_gguf.py` or `decide_lmstudio.py`, which send the typed question with thinking off and read the probabilities. The mmproj is not needed.

## Community quantizations

Thanks to mradermacher for building GGUF quantizations of this model:

- [mradermacher/jebadiah-27b-GGUF](https://huggingface.co/mradermacher/jebadiah-27b-GGUF)

These are independent builds. The agreement numbers on this card are for the files in this repository, not for these. Whichever GGUF you use, Jeb decides through `jeb serve` or the scripts above, with thinking off; it is not a chat model, so the chat window will give odd results.

## How it was measured

Jevals PubMedQA, Banking77 (77 options) and HelpSteer2, plus Nimble: the merge check's fixed sample (seed
20260925), the run's option order and the run's temperatures, so the probability differences compare like with like (the shipped temperatures.json since `1c0d794f` uses 0.7558 for score; top picks do not depend on it). "Same answer" is the top option; "prob. diff" is the
largest change on any option against the run's CUDA record. llama-server ran on Metal (M3 Ultra) with the same tokens as the Python renderer on every prompt. Records: `eval/agreement-*.json`.

## License

Apache-2.0, as the base model. Made in Texas.