How to use from
llama.cpp
Install (macOS, Linux)
curl -LsSf https://llama.app/install.sh | sh
# Start a local OpenAI-compatible server with a web UI:
llama serve -hf locailabs/Jupiter-G-8B-GGUF:Q4_K_M
# Run inference directly in the terminal:
llama cli -hf locailabs/Jupiter-G-8B-GGUF:Q4_K_M
Install from WinGet (Windows)
winget install llama.cpp
# Start a local OpenAI-compatible server with a web UI:
llama serve -hf locailabs/Jupiter-G-8B-GGUF:Q4_K_M
# Run inference directly in the terminal:
llama cli -hf locailabs/Jupiter-G-8B-GGUF:Q4_K_M
Use pre-built binary
# Download pre-built binary from:
# https://github.com/ggerganov/llama.cpp/releases
# Start a local OpenAI-compatible server with a web UI:
./llama-server -hf locailabs/Jupiter-G-8B-GGUF:Q4_K_M
# Run inference directly in the terminal:
./llama-cli -hf locailabs/Jupiter-G-8B-GGUF:Q4_K_M
Build from source code
git clone https://github.com/ggerganov/llama.cpp.git
cd llama.cpp
cmake -B build
cmake --build build -j --target llama-server llama-cli
# Start a local OpenAI-compatible server with a web UI:
./build/bin/llama-server -hf locailabs/Jupiter-G-8B-GGUF:Q4_K_M
# Run inference directly in the terminal:
./build/bin/llama-cli -hf locailabs/Jupiter-G-8B-GGUF:Q4_K_M
Use Docker
docker model run hf.co/locailabs/Jupiter-G-8B-GGUF:Q4_K_M
Quick Links

Jupiter

Jupiter-G-8B

Jupiter-G-8B is a post-trained variant of Google Gemma 4 E4B IT, developed by Locai Labs. The G denotes the Gemma base. Jupiter-G-8B improves instruction following (+1.7 IFEval, +1.0 IFBench) and coding/agentic capability (+3.2 LCB pass@1) while preserving the base model's reasoning and knowledge through our Forget-Me-Not™ framework. This model was trained on 1 H200 GPU using 100% renewable energy.

Benchmarks

We evaluate Jupiter-G-8B against gemma-4-E4B-it.

Benchmark Jupiter-G-8B gemma-4-E4B-it
IFEval (prompt strict) 89.3 87.6
IFBench (prompt strict) 35.4 34.4
AgentHarm harm rate 12.0 22.3
MMLU Redux 82.0 83.4
LiveCodeBench v6 55.2 52.0

IFEval and IFBench both reported with prompt strict accuracy. LiveCodeBench v6 reported with pass@1.

Training

Post-Training Data

Jupiter-G-8B is fine-tuned on a curated mixture of five datasets:

Dataset Domain N
Self-cognition (non-reasoning) Identity ~full
UltraChat (reasoning + non-reasoning) Reasoning / Replay 12,500
Nemotron terminal trajectories (reasoning) Terminal / Agentic 20,000
Nemotron competitive programming (non-reasoning) Coding 20,000

Training Configuration

Method LoRA (rank 16, alpha 32)
Target Modules All linear layers
Epochs 2
Optimiser AdamW (fused)
Learning rate 2e-4 (cosine decay, 5% warmup)
Weight decay 0.001
Max grad norm 1.0
Batch size 64 (global: 8 local x 8 accumulation)
Sequence length 2,048
Precision BF16
Gradient checkpointing Enabled
Loss Assistant-only
Kernel Liger
Attention Eager

Key Techniques

  • Forget-Me-Not: Synthetic replay data generated by the unmodified base model on UltraChat prompts, preserving existing capabilities during domain-specific fine-tuning.
  • Agentic/terminal training: Curated terminal trajectories from NVIDIA's Nemotron-Terminal-Corpus.
  • Competitive programming: Exercism-derived programming problems from Nemotron corpora to strengthen code generation.

Citation

@misc{locailabs2026jupiterg,
  title   = {Jupiter-G-8B},
  author  = {George Drayson},
  year    = {2026},
  url     = {https://huggingface.co/locailabs/Jupiter-G-8B}
}

Acknowledgements

Jupiter-G-8B builds on Google Gemma 4. Terminal and programming data are sourced from NVIDIA's Nemotron corpora.

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