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Step 5 Preview: Advancing the Pareto Frontier

141 points · 33 comments · nateb2022

nh43215rgb · 1789885567 · focus · HN ↗
```
  &gt; Built on a sparse Mixture-of-Experts architecture, Step 5 Preview has 600B total parameters, with 27B active per token, and supports a 1M-token context window and vision input.

  &gt; Step 5 Preview scores 44 on the Artificial Analysis Intelligence Index.

  &gt; The model will be released with open weights on October 15.
```
I guess being Chinese company they decided to skip version 4, while also giving impression to be on the similar iteration with leading companies (claude opus 5). I wonder if other Chinese labs like Kimi/Moonshot will follow suit.
1. Bolwin · 1789890612 · focus · HN ↗
  Moonshot has already teased K3.1 so not likely
  1. dannyw · 1789890970 · focus · HN ↗
    K3.1 would likely be a deeper/longer post-train from K3, so that’d make sense.
    It’s all marketing anyways, but that’s at least how a lot of labs have been naming things (sometimes).
2. JohnsonZou · 1789893550 · focus · HN ↗
  Another possible reason is that the number 4 is considered unlucky in traditional Chinese culture.
  1. zozbot234 · 1789901964 · focus · HN ↗
    Parent commenter hinted at that. Yet DeepSeek has released their V4 which was hugely successful, and even their new architecture is marked V4.1. Qwen internals mark their Flash-Next model, also very compelling, as "qwen4exp". So both of them are bucking the negative stereotype.
3. torginus · 1789905350 · focus · HN ↗
  Dunno, if US labs would embrace this silly logic, then Anthropic would be compelled to release Fable/Opus 6 instead of a .1 release
4. Tepix · 1789908087 · focus · HN ↗
  600b-a27b doesn’t sound enticing. Also with the higher number of active parameters compared to GLM 5.3 flash and DeepSeek V4/4.1 flash, I don’t see how they want to be more efficient at inference.
5. NooneAtAll3 · 1789909195 · focus · HN ↗
  I kinda wish everyone just used dates instead...
  1. NetOpWibby · 1789918482 · focus · HN ↗
    Using dates immediately makes you look dated and everyone is in this constant race to be first!!1!!1!
    I agree with you though, ChronVer all the way.

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