GPT-OSS vs. Qwen vs. Deepseek: Comparing Open Source LLM Architectures

A technical breakdown and comparison of the architectures, training methodologies, and post-training techniques of three leading open-source models: OpenAI's GPT-OSS, Alibaba's Qwen-3, and DeepSeek V3. The summary explores their different approaches to Mixture-of-Experts, long-context, and attention mechanisms.