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Physix Frontier · News Briefing Card (IT Home · Sep 28, 2026)

Moonshot Kimi K3.1 model ID leaks, supports million-token context

KEY FACTS

  • Multiple developers discovered the kimi-k3-1 model identifier in Moonshot's API backend and found it callable.
  • Moonshot's official open platform subsequently posted a preview of the K3.1 or K3 11111 model.
  • The model is expected to support a context window of up to 1 million tokens.
  • K3.1 offers three reasoning effort tiers: Low, High, and Max.
  • The open platform shows K3.1's API pricing is the same as the existing K3.

KEY DATA

1 million tokensContext window
3 tiers (Low/High/Max)Reasoning effort tiers

PHYSIX OBSERVATION

By pushing context to the million-token level and introducing multiple reasoning effort tiers, K3.1 shows Moonshot is shifting the competitive focus from parameters to inference cost and agent capabilities. If pricing holds level with K3, that's good news for developers, but the placeholder may mean final pricing is still subject to change. If multi-agent collaboration ships, it will deal a direct blow to existing agent toolchains.

Source: IT Home report