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

Date	Type	Link
2026/04/13	Model	LiteCoder-Terminal-30b-a3b-sft
2026/04/13	Model	LiteCoder-Terminal-4b-sft
2026/04/13	Dataset	LiteCoder-Terminal-SFT
2026/04/13	Dataset	LiteCoder-Terminal-World-Model-SFT
2026/04/13	Dataset	LiteCoder-Terminal-RL-preview
2026/04/13	Code	icip-cas/LiteCoder

Results

Terminal Bench 1.0 Performance

Model	Agent	pass@1	pass@4
LiteCoder-Terminal-30b-a3b-sft	Terminus 2	24.38%	40%
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	14.69%	28.75%
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%
Qwen3-30B-A3B-Instruct	Terminus 2	5.34%	11.24%
LiteCoder-Terminal-4b-sft	Terminus 2	4.78%	10.11%
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%
LiteCoder-Terminal-4b-sft	Terminus 2	21.5%
Qwen3-30B-A3B-Nex-N1	Openhands	21.0%
Qwen3-30B-A3B-Instruct	Terminus 2	20.5%
OpenThinker-Agent-v1	Terminus 2	19.5%
LiteCoder-4b-Terminal-preview	Terminus 2	15.0%
Qwen3-4B-Instruct	Terminus 2	3.5%

Citation

bibtex

@article{peng2026litecoderterminal,
  title={LiteCoder-Terminal: Scaling Long-Horizon Terminal Environments for Learning Language Agents},
  author={Peng, Xiaoxuan and Zhang, Kaiqi and Lu, Xinyu and Cao, Boxi and Lu, Yaojie and Lin, Hongyu and Han, Xianpei and Sun, Le},
  journal={arXiv preprint arXiv:2605.29559},
  year={2026}
}

Lite-Coder/LiteCoder-Terminal-4b-sft

LiteCoder-Terminal-4b-sft