qwen3-5-4bQwen3.5-4B is Alibaba’s open-weights AI model, released Feb 24, 2026. Its strongest use case is agentic & tools, where it ranks in the 63rd percentile of the models Model Beat tracks.
Scores on standardized evaluations. Higher is better — and rank shows where Qwen3.5-4B lands among all models tracked on Model Beat.
Graduate-level scientific reasoning
Frontier of human expert knowledge
Scientific research coding
Olympiad-qualifier math
Tool-agent-user reliability
Qwen3.5-4B is a Qwen-family AI model, from Alibaba, released Feb 24, 2026.
Qwen3.5-4B is an AI model developed by Alibaba, part of the Qwen family, released Feb 24, 2026.
On standardized evaluations tracked by Epoch AI, Qwen3.5-4B scores 92.1% on τ²-bench, 77.1% on GPQA Diamond, 9.9% on Humanity's Last Exam.
Qwen3.5-4B is released with open weights (Open weights (restricted use)), so the model can be downloaded and self-hosted.
Benchmark data from Epoch AI (CC BY) and Artificial Analysis; pricing, specs & descriptions from OpenRouter. Data updated Sep 4, 2026.