Moonshot AI’s Kimi K3 Arrives on Amazon Bedrock With 1M-Token Context

The open-weight Kimi K3 model (2.8 trillion parameters) became available on Amazon Bedrock on September 18, 2026. It supports 1 million token context, native vision, and offers ~2.5x scaling efficiency gain over Kimi K2. According to the developer, the model trails Claude Fable 5 and GPT 5.6 Sol.

• 2.8 trillion parameters — first open model of this scale
• 1 million token context and native vision capabilities
• 16 of 896 experts activated in Stable LatentMoE scheme
• First open model in Bedrock with explicit prompt caching