Chinese AI startup Moonshot AI has launched Kimi K3, a new open-weight AI model with 2.8 trillion parameters, as competition in the global AI industry continues to grow. The company says the model is designed for advanced reasoning, coding and handling large amounts of information, positioning it as a competitor to leading AI systems from companies like OpenAI and Anthropic.
Kimi K3 comes with a 1 million-token context window, allowing the model to process large documents, research material and complex codebases in a single prompt. This makes it suitable for tasks that require deeper analysis and handling of long conversations or large datasets.
The model is available through Moonshot AI’s API platform and OpenRouter in two versions K3 Max and K3 Cluster Max. The company has introduced a new architecture called Kimi Delta Attention, which is designed to improve efficiency while processing long inputs. Moonshot has also added a feature called Attention Residuals, although the company has not shared detailed information about how it works.
Moonshot claims that Kimi K3 delivers strong performance in reasoning, coding and web development tasks and can compete with some of the latest AI models from leading US companies. However, these claims are yet to be independently verified, as the company has not released complete benchmark results or a detailed technical report.
The model is priced at $3 per million input tokens and $15 per million output tokens. While it is more expensive than Moonshot’s previous K2.6 model, the pricing remains lower than several premium AI models from major US AI companies.
The launch highlights the rapid growth of China’s AI sector, with companies such as DeepSeek, MiniMax and other AI startups also developing advanced models. Kimi K3’s release shows the increasing competition between Chinese and US AI companies as they race to build more powerful and efficient AI systems.
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