Kimi announces K3.1 Pro with upgrades for coding, 3D design and finance

Kimi has announced K3.1 Pro, describing it as its most capable open-weight model. The company says the multimodal system can handle a million tokens of context and targets complex coding, design and financial tasks.

The model uses a mixture-of-experts architecture with 2.8 trillion parameters in total and 104 billion active parameters. Kimi highlighted its ability to work on complete game projects using Unreal, Unity and Godot, alongside parametric modeling in Blender and CAD software.

For financial work, Kimi claims improved modeling accuracy and a 65% reduction in hallucinations. The announcement excerpt does not identify the comparison baseline or testing conditions, so that figure does not establish how reliably the model will perform across different financial tasks.

The specifications retain the total parameter count and context capacity of the earlier K3, putting the emphasis on improvements in practical performance. Kimi previously positioned K3 for extended coding assignments, reasoning and knowledge work. Details of K3.1 Pro's downloadable weights, licensing and release schedule could not be verified from the accessible official material.