Is Moonshot AI preparing Kimi K3.1?

UnconfirmedLast checked
Moonshot AIFirst seen

Verdict

Unconfirmed. Leaked test data in a since-deleted SGLang pull request references 'moonshotai/Kimi-K3.1', describing it as using Kimi K3's tokenizer and chat format with a new 'medium' thinking effort. Moonshot AI has not announced the model.

Evidence timeline · 1 source · newest first
  1. Unconfirmed

    Leaked code, not an official source. A commit titled 'feat(sgl-router): Kimi-K3.1 support for the K3 chat encoder', from a since-deleted SGLang pull request, adds test data for 'moonshotai/Kimi-K3.1'. Its message says Kimi-K3.1 'ships K3's tiktoken.model byte for byte' with 'the same 16 special tokens', and that the encoder's 'only semantic change is _VALID_THINKING_EFFORTS gaining "medium"' (low, medium, high, max). The K3.1 test fixtures include image-input cases. GitHub's event log shows the pull request was closed on Oct 20 about a minute after being renamed from 'Kimi-K3.1 support' to 'Kimi-K3 support'.

Quick answers
Is Kimi K3.1 out yet?
No. Moonshot AI has not announced it as of Oct 20.
When is Kimi K3.1 expected?
No official release date as of Oct 20.
How we label rumors
Unconfirmed
Circulating with at least one public source we can link to; no official confirmation.
Reported
Reported by a news outlet; not confirmed by the company.
Confirmed
Confirmed by the company or another official source.
Debunked
Denied by the company, retracted by the original source, or shown to be false by the evidence.

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