Question 1

What is Kimi K3?

Accepted Answer

Kimi K3 is a 2.8T parameter open-weight multimodal reasoning model from Moonshot AI. It is suited for complex coding, knowledge work, and long-horizon agentic workflows, and is particularly strong at navigating large repositories, using tools, debugging, and iterating against images, logs, tests, and runtime feedback. Its architecture uses KDA and Attention Residuals for computational efficiency.

Question 2

How much does Kimi K3 cost?

Accepted Answer

Kimi K3 costs $2.80/M input tokens and $14.00/M output tokens, with separate rates for Cache Read at $0.29/M tokens.

Question 3

What is the context length of Kimi K3?

Accepted Answer

Kimi K3 has a 1,048,576 token context window. It supports up to 1,048,576 completion tokens.

Question 4

Does Kimi K3 support tool calling and structured outputs?

Accepted Answer

Yes. Kimi K3 accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.

Question 5

What inputs and outputs does Kimi K3 support?

Accepted Answer

Kimi K3 accepts text and images as input and returns text.

Question 6

Which providers serve Kimi K3?

Accepted Answer

Kimi K3 is served by 10 providers on OpenRouter: Morph Fast, DigitalOcean, DeepInfra, Modal, Baseten, Fireworks Fast, Chutes, Together and 2 more. Requests are routed to the best available provider, with automatic failover to the others, and you can pin or exclude providers with provider routing.

Question 7

When was Kimi K3 released?

Accepted Answer

Kimi K3 was released on 2026-07-16.

MoonshotAI: Kimi K3

moonshotai/kimi-k3

MoonshotAI: Kimi K3

moonshotai/kimi-k3

Frequently asked questions

Frequently asked questions