Kimi K3.

Kimi K3

Kimi K3 is the world's first open 3T-class AI model, featuring 2.8 trillion parameters and a 1-million-token context window. Built on revolutionary Kimi Delta Attention and Attention Residuals architecture, it delivers frontier-level performance in long-horizon coding, knowledge work, and multimodal reasoning. As an openly available model with full weights releasing by July 27, 2026, Kimi K3 democratizes access to cutting-edge intelligence previously locked behind proprietary APIs.

Product Highlights

• 2.8 Trillion Parameters: The first open model to reach 3T-class scale, with 16 active experts out of 896 through Stable LatentMoE for efficient inference.
• 1-Million-Token Context Window: Process entire codebases, research libraries, and long-form content in a single session without fragmentation.
• Native Multimodal Architecture: Seamlessly integrate text, images, and video understanding for vision-in-the-loop coding, video editing, and interactive visualization.
• Kimi Delta Attention (KDA): A novel attention mechanism enabling efficient scaling beyond trillion-parameter regimes with optimized information flow.
• Attention Residuals (AttnRes): Selectively retrieves representations across model depth rather than uniform accumulation, improving reasoning quality.
• Long-Horizon Coding Agent: Sustains extended engineering sessions with minimal supervision, navigates massive repositories, and orchestrates terminal tools autonomously.
• GPU Kernel Optimization: Demonstrated capability to design novel kernel algorithms from scratch, achieving 2.6× speedups on production attention operations.
• Compiler Development: Built MiniTriton, a full GPU compiler with tile-level IR and PTX codegen rivaling industry-standard Triton performance.
• Chip Design Automation: Autonomously designed, optimized, and verified a 1.46M-cell ASIC in 48 hours using open-source EDA tools.
• Competitive Token Pricing: API pricing at $0.30/MTok cache-hit input, $3.00/MTok cache-miss input, and $15.00/MTok output with 90%+ cache hit rates on coding workloads.

Use Cases

• Autonomous Software Engineering: Deploy Kimi K3 for end-to-end application development, from architecture design through deployment, with sustained multi-hour coding sessions and automated debugging.
• Scientific Research Acceleration: Bridge literature review and executable code by autonomously implementing complex numerical pipelines, cross-validating papers, and generating interactive research dashboards.
• Multimodal Content Creation: Transform concepts, images, and video into playable interactive experiences, motion graphics explainers, and professionally edited videos with frame-accurate synchronization.
• Enterprise Knowledge Work: Generate interactive industry research reports with recursive self-improvement, pulling data from thousands of sources and producing publication-quality visualizations and presentations.
• GPU and Hardware Optimization: Optimize kernels for novel architectures, develop compilers from scratch, and automate chip design for AI acceleration—tasks requiring deep systems expertise.
• Intelligent Agent Infrastructure: Build persistent, visual workflows using Widgets and Dashboard features for continuous data monitoring, automated updates, and collaborative project management.

Target Audience

Kimi K3 serves AI researchers and engineers pushing the boundaries of open-source model capabilities, software developers requiring autonomous coding agents for complex, long-duration tasks, and enterprise teams seeking to deploy frontier intelligence with full model ownership and customizable infrastructure. It particularly benefits organizations in scientific computing, semiconductor design, and multimedia production where multimodal reasoning combined with extended context processing delivers transformative productivity gains.