Language model

Kimi K2

Moonshot AI

Released: July 2025

Kimi K2 is Moonshot’s open K2 Instruct release. The repository describes 1 trillion total parameters, 32 billion active parameters, and about 131,000 tokens of context. This entry represents the foundational K2 Instruct release.

The dated checkpoints Kimi K2 0711 and Kimi K2 0905 remain separate model identities. Moonshot has discontinued the K2 API series; the open weights and external deployments are separate from that service.

Specifications and access

Specification	Value and source
Weights	Open weightsSource
Access	APISource
Parameters	1,000 billionSource
Active parameters	32 billionSource
Context window	131,072 tokensSource
License	Modified MITSource
Inputs	TextSource
Outputs	TextSource
Tool calling	YesSource

Sources and data date

Type	Evidence and data date
Additional source	GitHub · Kimi K2 repository · Editorial description reviewed October 2, 2026
Additional source	Kimi API model list · Editorial description reviewed October 2, 2026
Additional source	OpenRouter: Popularity index (derived), CC BY 4.0
Additional source	Vercel AI Gateway: Popularity index (derived), CC BY 4.0
Additional source	Creative Commons Attribution 4.0

Specifications and access

Popularity

Sources and data date