Kimi K3.1 Pro launch: official benchmarks claim parity with GPT-6 Astra
Moonshot releases Kimi K3.1 Pro and a Highspeed variant with 2.8T total params and 1M context, claiming official benchmark parity with GPT-6 Astra, Claude Fable 5.1 and Opus 5.5; open weights arrive Nov 4.
𝑾𝒆𝒍𝒄𝒐𝒎𝒆, 𝑲𝒊𝒎𝒊 𝑲𝟑.𝟏 𝑷𝒓𝒐! 𝑰𝒕’𝒔 𝒃𝒆𝒆𝒏 𝒂 𝒍𝒐𝒏𝒈 𝒕𝒊𝒎𝒆! According to official benchmark comparisons, this is the most powerful open-source model ever, and the first to truly match Fable 5-level performance, and even on par with GPT-6 Astra, Claude Fable 5.1, and Opus 5.5! 2.8T total params, 104B active params Multimodal, 1M context Kimi K3.1 Pro and K3.1 Pro Highspeed (2–3× faster) are now live on http://Kimi.ai, Kimi Work, Kimi Code, and the Kimi API. Open weights will be released on November 4, 2026! 𝑯𝒂𝒑𝒑𝒚 𝑲𝟑.𝟏 𝑫𝒂𝒚! 🥳🎈
This post quotes another post: x.com/kimi_moonshot/status/2113680701770068067