Kimi K2.5 is Kimi's most powerful open-source model to date, built as a native multimodal architecture that supports both visual and text input. The model delivers state-of-the-art coding and vision capabilities along with a self-directed agent swarm paradigm for complex task execution. It represents a significant advancement in AI capabilities for real-world knowledge work and complex problem-solving.

Key features include coding with vision capabilities that allow turning simple conversations into complete front-end interfaces with interactive layouts and rich animations. The model excels at visual debugging and can reconstruct websites from video inputs. Agent swarm functionality enables self-directed coordination of up to 100 sub-agents executing parallel workflows across up to 1,500 tool calls, reducing execution time by up to 4.5x compared to single-agent setups. Office productivity features include handling high-density, large-scale office work end-to-end, creating documents, spreadsheets, PDFs, and slide decks directly through conversation.

The agent swarm operates through Parallel-Agent Reinforcement Learning (PARL), where a trainable orchestrator agent decomposes tasks into parallelizable subtasks executed by dynamically instantiated frozen subagents. This approach uses staged reward shaping that encourages parallelism early in training and gradually shifts focus toward task success. The system employs Critical Steps as a latency-oriented metric inspired by critical path computation to evaluate performance effectively.

Benefits include significant time savings on complex tasks, with agent swarm reducing end-to-end runtime by 80% while enabling more complex long-horizon workloads. The model supports advanced office tasks such as adding annotations in Word, constructing financial models with Pivot Tables, writing LaTeX equations in PDFs, and scaling to long-form outputs like 10,000-word papers or 100-page documents. Tasks that once took hours or days now complete in minutes.

Kimi K2.5 targets developers, researchers, and professionals needing advanced AI capabilities for coding, office productivity, and complex task automation. It integrates with various platforms including Kimi.com, Kimi App, API, and Kimi Code, which works in terminals and integrates with IDEs like VSCode, Cursor, and Zed. The model supports images and videos as inputs and automatically discovers and migrates existing skills into working environments.