Definition
Plain language
Alibaba's family of open-weight large language models.
As stated in the literature
Alibaba's series of open-weight foundation models including Qwen2.5, Qwen3, and Qwen3-Coder, widely used in agent research.
Also called: Qwen2, Qwen2.5, Qwen3, Qwen-2, Qwen-3, Qwen-3-V-L, Qwen-3-Coder, Qwen3-Coder, Qwen3-VL, chwen, chwen-three, chwen-zero, chwen-two-point-five, chwen3, Qwen Math seven B
Why it matters: Open-weight families like Qwen are the substrate most independent agent research is actually built on, since closed-API models can't be fine-tuned or fully studied.
For example, a researcher fine-tuning an open agent will often start from Qwen3 because its weights are freely downloadable and its quality is competitive with closed models.
Heard on the show
“He also runs the analysis on an untuned base model — chwen-two-point-five at one-and-a-half billion, before any alignment training has happened.”Episode 004 — The Sycophancy Circuit That Survives Alignment Training