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Kimi K2.5

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.

ReasoningVision (Image)Tool UseImplicit Caching
index.ts
import { streamText } from 'ai'


const result = streamText({
  model: 'moonshotai/kimi-k2.5',
  prompt: 'Why is the sky blue?'
})
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Frequently Asked Questions

  • What makes Kimi K2.5 different from earlier K2 models?

    It's the successor generation after K2. It adds frontend coding and visual inputs in Moonshot AI's documentation, which earlier K2-focused releases did not emphasize.

  • Does Kimi K2.5 support visual or image inputs?

    Yes for vision-style tasks in Moonshot AI's materials. Confirm input modalities and limits on https://platform.moonshot.ai/docs/pricing/chat#product-pricing before you build a vision pipeline.

  • What kind of frontend code can Kimi K2.5 generate?

    Moonshot AI documents interactive user interfaces with dynamic layouts and animations, not only static markup.

  • Is Kimi K2.5 open source?

    Yes. Moonshot AI ships K2.5 as open source in the same lineage as other open-weight Kimi models.

  • When was Kimi K2.5 released on AI Gateway?

    Kimi K2.5 became available through AI Gateway on January 26, 2026. Timing and scope are documented in the K2.5 on AI Gateway changelog post and on https://platform.moonshot.ai/docs/pricing/chat#product-pricing.

  • Should I use K2.5 or K2 Thinking for complex reasoning tasks?

    Use K2 Thinking when you need extended chain-of-thought traces (math proofs, step-by-step algorithm design). K2.5 covers broad tasks including reasoning, but K2 Thinking is the match when explicit deliberation is the main requirement.

  • How do I use Kimi K2.5 with the AI SDK?

    Set the model to moonshotai/kimi-k2.5 in your AI SDK call. No other configuration changes are required.