Kimi K2 API Shut Down for Users on May 27, 2026

The Kimi K2 API has been shut down today, May 27, 2026. This means users can no longer access Kimi AI models through this specific service, marking a big change for the project.
By Newsroom | Technology, Artificial Intelligence |

The Kimi K2 series API has been officially retired and will no longer be maintained or supported. This marks a definitive pivot for the Kimi AI project, moving away from broad API accessibility for this specific model family. The closure affects users who relied on programmatic access to the K2 series, signaling a transition to potentially different delivery mechanisms or a more focused development path.

The decision to decommission the Kimi K2 series API suggests a strategic recalibration, with implications for how users will interact with future Kimi models.

Details surrounding the exact reasons for the API's discontinuation remain sparse. However, previous iterations of the K2 series, such as Kimi K2.6, were noted for their advanced capabilities, particularly in coding and agentic tasks. These models boasted features like a 128K token context window, sophisticated "mixture-of-experts" architecture, and the ability to handle complex, long-form content and dialogue.

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Earlier models in the K2 lineage, including Kimi K2.5, were promoted for their visual agent capabilities and the development of "Agent Swarms" designed for coordinated, multi-agent collaboration on large-scale parallel tasks. The K2.6 release, which occurred on April 21, 2026, was characterized as a rapid transition from preview to general availability, indicating a strong internal validation and successful partner evaluations. This version also incorporated mechanisms to manage context window limitations by summarizing and pruning its own history.

The availability of Kimi K2 models was typically through the Kimi website, app, API, and Kimi Code. While the K2.6 release stated API compatibility with Anthropic's Claude Code, the current announcement of the K2 series API's offline status renders this compatibility moot for that specific model line. The underlying commitment to open-source and free usage for certain Kimi K2 models, as highlighted for K2.6, may or may not extend to future offerings. The Kimi project has emphasized that K2.6 was not intended as a final point, hinting at ongoing development and potential evolution of their model architectures and access methods.

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Frequently Asked Questions

Q: Why has the Kimi K2 API been shut down?
The Kimi K2 series API has been officially retired. This means it will no longer be maintained or supported by the Kimi AI project. The project is shifting its focus away from this specific API.
Q: Who is affected by the Kimi K2 API shutdown?
Users who relied on the Kimi K2 series API for programmatic access to Kimi AI models are affected. This change signals a transition to different ways of accessing Kimi's services.
Q: What were the features of the Kimi K2 models?
Previous Kimi K2 models, like K2.6, had advanced features such as a large 128K token context window, a 'mixture-of-experts' design, and abilities for coding and complex tasks. They could also handle long texts and dialogues.
Q: What happens next for Kimi AI users?
The exact reasons for the shutdown are not fully clear, but Kimi AI is likely moving towards new delivery methods or a more focused development path. Users may need to look for updates on how to access future Kimi models.