Qwen: Qwen3 235B A22B Thinking 2507 (retires Oct 9)

Qwen3-235B-A22B-Thinking-2507 is a causal language model built on a Mixture-of-Experts architecture, utilizing 235 billion total parameters with 22 billion active parameters per forward pass. Designed specifically for deep reasoning, the model employs a specialized thinking-only mode that forces structured, step-by-step analysis before generating a final response. By leveraging 128 experts—with 8 active at any given time—it achieves high efficiency while maintaining the capacity to handle intricate tasks in mathematics, coding, and scientific research. Its native support for a 262,144-token context window allows it to process and synthesize vast amounts of information, making it a robust choice for users requiring high-fidelity logical output.

The model represents a significant evolution in the Qwen3 series, benefiting from extensive pre-training and post-training stages that refine its instruction-following and alignment capabilities. Through iterative scaling of its reasoning depth, the model has reached state-of-the-art performance among open-source alternatives, excelling in academic benchmarks that demand human-level expertise. Its design is optimized for complex agentic workflows and tool usage, where the model must navigate multi-step problems. With its ability to handle long-form generation and nuanced technical queries, it serves as a powerful foundation for developers looking to deploy sophisticated reasoning agents that require both reliability and deep analytical precision.