Recent advancements in open-weight chat models have been announced, showcasing significant improvements in performance and capabilities. DeepSeek-V2-Chat-0628 has achieved Rank 1 in the Open Weight Model category in Chatbot Arena and is ranked #11 overall, outperforming other open-source models. It also holds the #3 position in both the Coding Arena and Hard Prompts Arena. Additionally, Athene-Llama3-70B, a fine-tuned version of Llama-3-70B from Meta AI, has been released by NexusflowX. This model has set a new record on Arena-Hard with a score of 77.8%, approaching the performance of top proprietary models like Claude-3.5 and GPT-4o. ELO ratings for these models are expected soon. These developments highlight the potential of post-training in enhancing the capabilities of open-source models, making them competitive with leading proprietary solutions. API Access and Model Card for DeepSeek-V2-Chat-0628 are also available.