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Introducing Kimi K3 on Amazon Bedrock

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Introducing Kimi K3 on Amazon Bedrock

Open-weight models are changing the economics of building and deploying AI at scale. Rapid gains in intelligence and efficiency mean companies can match each workload with the right balance of capability, speed, and cost. AWS is building for a future in which organizations can adopt open-weight innovation with the reliability and security required for production.

Today, Kimi K3 from Moonshot AI is available on Amazon Bedrock, giving you a powerful new option for coding and knowledge work. According to Moonshot AI, Kimi K3 is its most capable model and the first open model to reach 2.8 trillion parameters. It combines native vision capabilities with a 1-million-token context window and delivers an approximate 2.5x improvement in scaling efficiency over Kimi K2. These advances make Kimi K3 well suited to long-running coding and knowledge workflows that require sustained context across large repositories, documents, and images. Kimi K3 is the first open-weight model on Amazon Bedrock to support explicit prompt caching, helping you reduce latency and input costs when reusing context across model calls.

The launch of Kimi K3 reflects the sustained investment by AWS in open-weight models on Amazon Bedrock. Since 2025, Bedrock has added dozens of open-weight models from providers including DeepSeek, Google, MiniMax, Mistral AI, Moonshot AI, NVIDIA, OpenAI, and Qwen. Supporting this expanding selection is continued advancement of the inference technology that serves these models at scale. In 2026, Bedrock added support for tool calling, structured output, reasoning, response streaming, and the Responses and Chat Completions APIs. Because these are platform capabilities rather than per-model integrations, new open-weight models can benefit from them as they become available on Amazon Bedrock.


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