Quick Answer: DeepSeek V4 released June 10, 2026. It is a 1.6 trillion parameter Mixture-of-Experts model with 256K context. The weights are free under DeepSeek Open License 2.0. It scores within 1 to 3 points of GPT-5.5 on MMLU-Pro, GPQA, and HumanEval. For self-hosted and low-cost API workloads, it is the better value. ...
Quick Answer: The best open-source LLM in 2026 depends on your task. DeepSeek V4 leads coding benchmarks, Llama 4 Maverick suits local agentic work, Mistral Large 3 balances multilingual tasks, and Qwen 3.5 Max offers permissive licensing. Open-source LLM releases accelerated in June 2026 when four major models landed on Hugging Face within six weeks. DeepSeek AI shipped V4 on June 9 with 1.6 trillion total parameters, 40 billion active parameters, a 256,000 token context window, and an MIT license. Meta released Llama 4 Maverick on May 28 with 780 billion total parameters, 52 billion active, a 1 million token context, and a Llama Community License. Mistral AI shipped Large 3 on June 2 with 540 billion total parameters, 32 billion active, a 512,000 token context, and Apache 2.0. Alibaba released Qwen 3.5 Max on May 15 with 420 billion dense parameters, a 1 million token context, and Apache 2.0. All models are open-weight and downloadable from their respective repositories. ...