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Kimi

Moonshot AI · 3 tracked releases · July 11, 2025 – September 11, 2026

At a glance

Releases tracked3
First trackedJuly 11, 2025 — Kimi K2
LatestSeptember 11, 2026 — Kimi K2.8 Preview
Span427 days
Median gap370 days between releases
Weights2 of 3 open
Record quality3 of 3 verified · how this is judged

Release cadence

One tile per tracked release, placed in the month it shipped, so the pauses in this line are the pauses in the data. Years with nothing tracked keep their row.

  1. 2025
    1. Kimi K2, Moonshot AI, July 11, 2025
    1
  2. 2026
    1. Kimi K3, Moonshot AI, July 16, 2026
    2. Kimi K2.8 Preview, Moonshot AI, September 11, 2026
    2

Lineage

Ordered by announcement date, and spaced by the gap between releases, so a quiet year looks like one. Lineage is not inferred from version numbers — labs do not number consistently, so the dates decide the order.

  1. Kimi K2Text in and out

    agenticcodingreasoning

  2. +370 days

    Kimi K3Text in and out

    from Kimi K2 Context window 128K → 1.05MParameters 1T → 2.8TLicence Modified MIT License → Kimi K3 License

  3. +57 days

    Kimi K2.8 Preview

    from Kimi K2 Weights Open → Proprietary

Context window over time

Only releases with a disclosed context window appear — 1 of 3 are not shown.

Kimi K2 · 2025 128K tokens
Kimi K3 · 2026 1.05M tokens

What changed

Generation to generation, from evidenced values only. A field is compared only where both releases record it — otherwise it is called out as not comparable, so a research gap never reads as a change the lab made.

Kimi K2 → Kimi K3 370 days

Context window
128K → 1.05M
Parameters
1T → 2.8T
Licence
Modified MIT License → Kimi K3 License

Kimi K2 → Kimi K2.8 Preview 427 days

Weights
Open → Proprietary

Not comparable here: context window (not researched on both releases); parameters (not researched on both releases); capabilities and modalities (not researched on both releases).

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