Key LLM releases include: 1. GPT-4 (OpenAI): March launch, a trillion parameters, excels in quality and creativity. GPT-Turbo, an upgraded version, followed. 2. Google Gemini: A multimodal LLM processing text, images, audio, and video. Gemini Ultra surpasses GPT-4 in benchmarks, with rigorous safety checks. 3.GPT-3.5 (OpenAI): "10 times more powerful than GPT-3.5," handles text and less complex tasks, Plus version uses GPT-4. 4. Llama 2 (Meta AI): March release, open source LLM package with varying parameters, gained popularity for its open nature. 5.PaLM 2 (Google): Google's most powerful LLM before Gemini, improved reasoning capabilities, multilingual training. 6. Claude 2 (Anthropic AI): July release with significant context length. Claude 2.1 surpasses GPT-4 in context length. 7. Mistral 7B (Mistral AI): Paris-based startup offering scaled-down LLMs. Mistral-7B was released in September, and Mistral 8x7B was introduced recently.