FW-Kimi-K2.5

Models available for use with Fireworks on Foundry deliver optimized, best-in-class performance on the Fireworks Inference Cloud. Fireworks on Foundry is a Non-Microsoft Product. The following terms apply to a Customer's use of Fireworks on Foundry: When you use Fireworks on Foundry, data is shared between Microsoft and Fireworks AI, Customer Data will be sent outside of Microsoft systems, Customer Data will not be processed pursuant to any Foundry data residency documentation, and different compliance and data handling rules will apply. See Trust Center - Fireworks AI for details. Customers are responsible for evaluating whether data sharing between Microsoft and Fireworks is appropriate for their organization's compliance requirements.

About this model

Kimi K2.5 is Moonshot AI's flagship agentic model and a new SOTA open model. It is an open-source, native multimodal agentic model built through continual pretraining on approximately 15 trillion mixed visual and text tokens atop Kimi-K2-Base. It unifies vision and text, thinking and non-thinking modes, and single-agent and multi-agent execution into one model. Users can control the reasoning behavior of the Kimi K2.5 model and inspect its reasoning history for greater transparency.

Key model capabilities

• Native multimodal: unifies vision and text understanding
• Dual reasoning modes: instant (non-thinking) and thinking
• Agent swarm: supports single-agent and multi-agent execution
• 256K token context window
• Function calling and tool use