LiteCoder-Terminal-4b-sft

LiteCoder-Terminal-4b-sft is part of our latest release on lightweight code agents. The model is fine-tuned from Qwen3-4B-Instruct-2507 on the LiteCoder-Terminal-SFT dataset.

Compared to our previous preview version, we scaled up the training data from under 1,000 samples to 11,255 trajectories, incorporating a broader task taxonomy and diverse agent scaffolds. With these updates, the model shows consistent improvements across Terminal Bench evaluations.

Released Artifacts

2026/04/13
LiteCoder-Terminal-30b-a3b-sft	Model	https://huggingface.co/Lite-Coder/LiteCoder-Terminal-30b-a3b-sft
LiteCoder-Terminal-4b-sft	Model	https://huggingface.co/Lite-Coder/LiteCoder-Terminal-4b-sft
LiteCoder-Terminal-SFT	Dataset	https://huggingface.co/datasets/Lite-Coder/LiteCoder-Terminal-SFT
LiteCoder-Terminal-World-Model-SFT	Dataset	https://huggingface.co/datasets/Lite-Coder/LiteCoder-Terminal-World-Model-SFT
LiteCoder-Terminal-RL-preview	Dataset	https://huggingface.co/datasets/Lite-Coder/LiteCoder-Terminal-RL-preview

Results

Terminal Bench 1.0 Performance

Model	Agent	pass@1	pass@4
LiteCoder-Terminal-30b-a3b-sft	Terminus 2	24.38%	30%
Qwen3-30B-A3B-Nex-N1	Openhands	18.44%	32.5%
LiteCoder-30a3b-Terminal-preview	Terminus 2	16.56%	27.5%
Qwen3-30B-A3B-Instruct	Terminus 2	16.56%	28.75%
LiteCoder-Terminal-4b-sft	Terminus 2	13.44%	30%
OpenThinker-Agent-v1	Terminus 2	11.25%	25%
LiteCoder-4b-Terminal-preview	Terminus 2	9.38%	20%
Qwen3-4B-Instruct	Terminus 2	6.25%	15%

Terminal Bench 2.0 Performance

Model	Agent	pass@1	pass@4
LiteCoder-Terminal-30b-a3b-sft	Terminus 2	12.36%	23.60%
Qwen3-30B-A3B-Nex-N1	Openhands	12.36%	23.60%
LiteCoder-30a3b-Terminal-preview	Terminus 2	6.18%	13.75%
LiteCoder-Terminal-4b-sft	Terminus 2	5.62%	12.36%
Qwen3-30B-A3B-Instruct	Terminus 2	5.34%	11.24%
OpenThinker-Agent-v1	Terminus 2	4.49%	10.1%
LiteCoder-4b-Terminal-preview	Terminus 2	4.78%	12.36%
Qwen3-4B-Instruct	Terminus 2	1.12%	3.37%

Terminal Bench Pro Performance

Model	Agent	pass@1
LiteCoder-Terminal-30b-a3b-sft	Terminus 2	31.5%
LiteCoder-30a3b-Terminal-preview	Terminus 2	22.0%
Qwen3-30B-A3B-Nex-N1	Openhands	21.0%
Qwen3-30B-A3B-Instruct	Terminus 2	20.5%
OpenThinker-Agent-v1	Terminus 2	19.5%
LiteCoder-Terminal-4b-sft	Terminus 2	15.5%
LiteCoder-4b-Terminal-preview	Terminus 2	15.0%
Qwen3-4B-Instruct	Terminus 2	3.5%

Citation

@misc{litecoder2026,
  title={LiteCoder: Advancing Small and Medium-sized Code Agents},
  author={Xiaoxuan Peng and Xinyu Lu and Kaiqi Zhang and Taosong Fang and Boxi Cao and Yaojie Lu},
  year={2026},
}