Kimi K3
Kimi K3 is Moonshot AI's open-source model with native visual understanding, always-on thinking, and a context window of 1.0M tokens, built for long-horizon software engineering and available through AI Gateway via Moonshot AI, Fireworks, Baseten, Morph, Nebius, Together AI, DigitalOcean. Your use is subject to Moonshot AI's Terms & Privacy Policies.
import { streamText } from 'ai'
const result = streamText({ model: 'moonshotai/kimi-k3', prompt: 'Why is the sky blue?'})About Kimi K3
Kimi K3, released July 16, 2026, is an open-source model from Moonshot AI with a context window of 1.0M tokens and native visual understanding. It accepts text, image, and video input. Thinking mode is always on, so every response includes a deliberation pass you can't switch off.
Kimi K3 handles software engineering that spans many turns, knowledge work across large document sets, and reasoning problems that need sustained attention. Moonshot AI points to tasks where code meets visual and spatial reasoning as the strongest fit, which covers frontend development, game development, and computer-aided design (CAD) workflows.
Native visual understanding changes how those pipelines compose. A coding agent reads a screenshot of a broken layout or a screen recording of a reproduction without a separate vision model in the pipeline. Design references and diagrams feed the same request as the prompt.
AI Gateway routes Kimi K3 across Moonshot AI, Fireworks, Baseten, Morph, Nebius, Together AI, DigitalOcean, including US-based providers for teams with data residency and compliance requirements. Provider selection and fallback sit behind one model ID, which gives you failover and more available throughput than a single provider offers. To keep inference in US data centers, set inferenceRegion with scope zone and geo region us. Regional inference lists above the standard rate, so check the pricing panel on this page.
For lower latency, set the speed option to fast and keep the model ID on moonshotai/kimi-k3. Requests route to the faster serving path and fall back to standard speed when the fast tier isn't available. You can also call kimi-k3-fast directly, which pins every request to that tier at a higher per-token rate. Zero Data Retention is configured per request with zeroDataRetention or turned on for every request from AI Gateway dashboard settings, and support varies by provider.
Use the identifier moonshotai/kimi-k3 with the AI SDK or any supported interface like Chat Completions, Responses, or Messages. Kimi K3 supports a context window of 1.0M tokens and completions up to 1M tokens per request, at $2.90 per million input tokens and $14 per million output tokens.