qwen-max-0919 is a proprietary large language model developed by Alibaba's Qwen team and released in September 2024. It serves as the flagship, closed-source offering within the Qwen 2.5 ecosystem, specifically optimized for high-complexity tasks such as mathematical reasoning, advanced programming, and multi-step logical deduction.
The model is built using a large-scale Mixture-of-Experts (MoE) architecture and was pretrained on a massive dataset of over 20 trillion tokens. This version, identified by the 0919 timestamp, introduced significant improvements in instruction following and alignment compared to previous iterations. It supports over 29 languages and is designed to compete with top-tier industry foundation models in both general and technical benchmarks.
While part of the Qwen 2.5 family—which includes several open-weight models—the Max tier remains closed-source. Alibaba has not publicly disclosed the specific parameter count for the 0919 version, focusing instead on its performance metrics in reasoning-heavy applications and its capability as a primary engine for sophisticated AI agents.