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Kimi K3.1 leak hints at million-token context and three reasoning modes

Kimi K3.1: What the Leak Reveals

Moonshot is reportedly preparing to launch Kimi K3.1, a new flagship model that could land as early as next month. The tip comes from a source on X known as @MaxForAI, who dug through internal JSON and API responses from Moonshot. Those snippets, including model names like "k3d1-agent," hint at a significant upgrade.

Three Levels of Reasoning Power

According to the leaked configuration files, K3.1 will offer three reasoning intensity levels: Low, High, and Max. That's a notable shift from the one-size-fits-all approach most models take today. Users could dial reasoning up or down depending on the task, balancing speed and depth.

A Million Tokens and Extended Context

The leak also mentions an "Extra Long" context option supporting up to 1 million tokens. That matches the context window of the current K3 flagship, but the new model may push efficiency further. For developers working with long documents, codebases, or multi-turn conversations, a million-token window is a big deal.

Agent Mode and Swarm Collaboration

Beyond raw context, K3.1 appears to support Agent mode and Swarm multi-agent collaboration. The configuration also references task modes like search and batch processing. If accurate, this would position K3.1 not just as a language model but as a platform for coordinating multiple AI agents on complex workflows.

What We Know About K3

To put the leak in perspective, Moonshot launched the original Kimi K3 in July 2026. That model packed 2.8 trillion parameters, native visual capabilities, and a 1 million token context window. It also introduced architectural tricks like Kimi Delta Attention, Attention Residuals, and sparse MoE.

K3.1 will need to build on that foundation. Will it offer better reasoning, faster inference, or tighter agent integration? The leak doesn't say. Moonshot hasn't confirmed any of this yet, so treat the details as unverified for now.

The Bigger Picture

The AI race is shifting from raw parameter counts to practical capabilities—reasoning control, context length, and multi-agent orchestration. K3.1's rumored features suggest Moonshot is betting on flexibility and agentic workflows rather than just scale. If the leak holds up, we'll know more in October.

Key Points

  • Kimi K3.1 may launch next month with three reasoning levels: Low, High, and Max.
  • Leaked configs point to 1 million token context, Agent mode, and Swarm multi-agent collaboration.
  • The current K3 flagship has 2.8 trillion parameters and a 1 million token window.
  • Moonshot has not officially confirmed any details yet.
  • The leak comes from @MaxForAI via internal API responses.