Kimi K2.5 is Moonshot AI's successor to the K2 family: multimodal inputs, upgraded frontend coding, and a context window of 262.1K tokens, available through AI Gateway via moonshotai, fireworks, novita, togetherai, bedrock.
import { streamText } from 'ai'
const result = streamText({ model: 'moonshotai/kimi-k2.5', prompt: 'Why is the sky blue?'})Kimi K2.5, released on January 26, 2026, is the generation after the K2 line. Moonshot AI describes K2.5 across agent tasks, coding, visual understanding, and general intelligence benchmarks in its release materials. K2.5 extends both text-based and visual tasks.
Frontend code generation is a highlighted change. Moonshot AI documents more capable frontend coding, including interactive UI with dynamic layouts and animations, beyond bare syntax-level output.
Access K2.5 through AI Gateway by setting the model string to moonshotai/kimi-k2.5. No extra provider accounts are required for gateway-managed access. AI Gateway's observability layer tracks token usage and costs across requests, which helps when usage patterns vary.
Kimi K2.5 is available through AI Gateway at $0.5 per million input tokens and $2.8 per million output tokens.